WO2008074946A1 - Device for determining the output power of a radiofrequency power amplifier by the contactless detection of its power supply current - Google Patents

Device for determining the output power of a radiofrequency power amplifier by the contactless detection of its power supply current Download PDF

Info

Publication number
WO2008074946A1
WO2008074946A1 PCT/FR2007/001984 FR2007001984W WO2008074946A1 WO 2008074946 A1 WO2008074946 A1 WO 2008074946A1 FR 2007001984 W FR2007001984 W FR 2007001984W WO 2008074946 A1 WO2008074946 A1 WO 2008074946A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
circuit
amplifier
supply current
power amplifier
Prior art date
Application number
PCT/FR2007/001984
Other languages
French (fr)
Inventor
Youcef Haddab
Yves Mene
Original Assignee
Youcef Haddab
Yves Mene
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Youcef Haddab, Yves Mene filed Critical Youcef Haddab
Publication of WO2008074946A1 publication Critical patent/WO2008074946A1/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0416—Circuits with power amplifiers having gain or transmission power control

Definitions

  • the present invention relates to a device for determining the output power of a radiofrequency power amplifier by non-contact detection of its supply current.
  • the closed-loop method is simple but lacks the need for additional components: RF magnetic coupler and rectification circuit. It is therefore relatively more expensive in energy.
  • the open-loop method does not require any additional components, but it is based on a very good control of the reproducibility of the power amplifier: In case of drift of its characteristics, the control becomes defective.
  • the current control method which is easy to implement, is widely used in control systems of power amplifiers. Its defect is the additional consumption of a significant part of the electrical power by the series resistance (of the order of 20%).
  • the object of the invention is therefore more particularly to eliminate these disadvantages.
  • a device for detecting the instantaneous power of a radiofrequency power amplification circuit comprising a power amplifier which receives on its inputs a radio signal to be amplified as well as possibly a power reference signal, this amplifier being powered by a power supply circuit.
  • this detection device consists of a non-contact measurement device of a parameter representative of the supply current of the amplifier, this detection circuit being galvanically isolated from the supply circuit, and an amplification circuit that provides the measured power signal.
  • This device for determining the instantaneous power of a radio frequency amplifier may be integrated into the device for regulating the output power of said amplifier. This determination may consist in the measurement without contact, and maintaining the galvanic isolation, of a parameter representative of the supply current of the amplifier.
  • the device may consist of a sensor and its power supply and amplification circuit. At the output of the amplification circuit, a signal representative of the power absorbed by the amplifier, ready to be processed by the other constituents of the regulation circuit will then be provided.
  • the non-contact measuring device may comprise a magnetic detection device such as a magnetic loop, a Hall effect sensor, a magnetoresistance, a "flux gate” component, etc.).
  • a magnetic detection device such as a magnetic loop, a Hall effect sensor, a magnetoresistance, a "flux gate” component, etc.
  • An important advantage of the solution according to the invention is that it avoids the significant loss of power supply induced by the resistance. - A - in series used in the current control method. This significantly improves the performance of the power amplifier / power meter assembly.
  • the measurement is made by preserving a galvanic isolation between the measuring circuit and the supply circuit: they are not directly connected.
  • the galvanic isolation from the power source eliminates the risk of deterioration of the amplification circuit of the electrostatic discharge measurement (the energy source is accessible from outside the system, hence the risk of propagation of electrostatic discharge).
  • the galvanic isolation from the power source eliminates the common mode at the input of the amplification circuit, which simplifies the amplification.
  • the single figure is a block diagram of a power control device delivered by a radio frequency power amplifier using a Hall effect measurement circuit of the low frequency consumption of the amplifier.
  • the power amplifier 1 of conventional type, delivers in an antenna 2 and is intended to emit a radio signal whose power is exactly that required by the specific transmission conditions.
  • This amplifier 1 receives on one of its inputs 3 a radio signal and on another input 4 a power reference signal delivered by a processing circuit 5, for example a processor. It is powered by an electric power source 6.
  • the power supply current of the power amplifier 1 is measured by a Hall effect sensor 7 powered by a low power polarization circuit 8 independent of the supply circuit of the amplifier 1.
  • Hall effect sensor 7 comprises, in a conventional manner, a four-contact semiconductor plate whose two opposite contacts 9, 10 are connected to the bias circuit 8 so as to generate between these two contacts an electric current.
  • V H V off + K H I b i as B (1)
  • V off is the offset voltage of the sensor 7
  • K H is a constant depending on the sensor type, I ⁇ i as the feed stream of the sensor 7.
  • the magnetic field B is itself generated by the power supply current I of the power amplifier 1 according to the well-known relation:
  • V H V off + K H Ibia S (3)
  • the voltage V H amplified in the amplification circuit 11, is transmitted to the processing circuit 5.
  • This processing circuit 5 comprises means 12 for measuring this voltage and means 13 for generating a power reference signal. suitable for performing a calibration between the supply current of the power amplifier and its power output. Such a calibration is carried out in a manner similar to that performed in the current-control method previously mentioned.
  • the Hall effect sensor circuit 7 may be fed discontinuously, it being understood that in order to produce a signal directly proportional to the supply current of the power amplifier, the Hall effect sensor will have to be supplied with constant current during the measurement period.
  • the Hall effect sensor 7 may be integrated in the chip (silicon or gallium arsenide for example) of one of the components of the transmission assembly (for example the power controller or the amplifier of power).
  • the measurement of the current can be performed on the power supply circuit of a component incorporating among other functions the power amplifier 1.
  • the device for measuring the power supply current of the power amplifier 1 may comprise any type of magnetic sensor other than a Hall effect sensor, delivering an electric quantity proportional to the magnetic field generated by the supply current I.
  • a Hall effect sensor delivering an electric quantity proportional to the magnetic field generated by the supply current I.

Abstract

The device of the invention can be used for determining the output power of a radiofrequency power amplifier (1) receiving on the inputs (3, 4) thereof a radio signal to be amplified and potentially a power set signal, the amplifier being powered by a power supply circuit (6). It comprises a contactless measuring device (7) for measuring a parameter representative of the power supply current (I) of the amplifier (1), the detection circuit being galvanically insulated from the power supply circuit (6), as well as an amplification circuit (11) that provides a measured power signal.

Description

DISPOSITIF DE DETERMINATION DE LA PUISSANCE DE SORTIE D'UN AMPLIFICATEUR DE PUISSANCE RADIOFREOUENCES PAR DETECTION SANS CONTACT DE SON COURANT D'ALIMENTATION. DEVICE FOR DETERMINING THE OUTPUT POWER OF A RADIOFREQUENCY POWER AMPLIFIER BY CONTACTLESS DETECTION OF ITS POWER CURRENT.
La présente invention concerne un dispositif de détermination de la puissance de sortie d'un amplificateur de puissance radiofréquences par détection sans contact de son courant d'alimentation.The present invention relates to a device for determining the output power of a radiofrequency power amplifier by non-contact detection of its supply current.
Elle s'applique notamment, mais non exclusivement, à la détection de puissance émise en sortie de systèmes de communication sans fils tels des téléphones portables, en norme GSM, GPRS, CDMA, UMTS ou tout autre système de transmission portable. Cette détection est utilisable dans un circuit de régulation pour émettre un signal dont la puissance est exactement celle requise par les conditions spécifiques de transmission.It applies in particular, but not exclusively, to the detection of power emitted at the output of wireless communication systems such as mobile phones, in GSM, GPRS, CDMA, UMTS or any other portable transmission system. This detection can be used in a control circuit to emit a signal whose power is exactly that required by the specific conditions of transmission.
D'une manière générale, on sait qu'il a déjà été proposé des dispositifs permettant de limiter au strict nécessaire la puissance d'émission du système de transmission. La réglementation en vigueur impose un tel contrôle pour assurer un fonctionnement optimal du système de transmissions et une influence minimale sur son environnement.In general, it is known that devices have already been proposed which make it possible to limit the transmission power of the transmission system to the strict minimum. The regulations in force impose such a control to ensure optimal operation of the transmission system and minimal influence on its environment.
A l'heure actuelle, il existe trois méthodes principales pour le contrôle de la puissance de sortie de l'amplificateur de puissance : 1. Mesure de la puissance par coupleur magnétique sur la ligne de sortie, et boucle de contre-réaction sur l'alimentation (méthode dite "en boucle fermée").At present, there are three main methods for controlling the power output of the power amplifier: 1. Measurement of the power by magnetic coupler on the output line, and feedback loop on the power supply (so-called "closed loop" method).
2. Calibration de la puissance de sortie et établissement d'une table de calibration introduite dans une mémoire (méthode dite "en boucle ouverte").2. Calibration of the output power and establishment of a calibration table introduced into a memory (so-called "open loop" method).
3. Contrôle du courant consommé par l'amplificateur de puissance grâce à une résistance série de faible valeur sur le courant d'alimentation de l'amplificateur de puissance et utilisation d'une table de calibration (méthode dite "contrôle de courant").3. Control of the current consumed by the power amplifier by means of a series resistance of low value on the supply current of the power amplifier and use of a calibration table (method called "current control").
La méthode en boucle fermée est simple mais a le défaut de nécessiter des composants supplémentaires : coupleur magnétique RF et circuit de redressement. Elle est donc relativement plus coûteuse en énergie.The closed-loop method is simple but lacks the need for additional components: RF magnetic coupler and rectification circuit. It is therefore relatively more expensive in energy.
La méthode en boucle ouverte ne nécessite aucun composant supplémentaire, mais elle est fondée sur un très bon contrôle de la reproductibilité de l'amplificateur de puissance : En cas de dérive de ses caractéristiques, le contrôle devient défectueux.The open-loop method does not require any additional components, but it is based on a very good control of the reproducibility of the power amplifier: In case of drift of its characteristics, the control becomes defective.
La méthode à contrôle de courant, facile à implémenter, se répand beaucoup dans les systèmes de contrôle des amplificateurs de puissance. Son défaut est la consommation supplémentaire d'une part non négligeable de la puissance électrique par la résistance série (de l'ordre de 20 %).The current control method, which is easy to implement, is widely used in control systems of power amplifiers. Its defect is the additional consumption of a significant part of the electrical power by the series resistance (of the order of 20%).
II s'avère que toutes ces méthodes sont soit imprécises et instables dans le temps, soit invasives. L'imprécision rend aléatoire l'efficacité du dispositif ; la mesure invasive est consommatrice d'énergie et perturbatrice.It turns out that all these methods are either imprecise and unstable over time, or invasive. The imprecision makes the efficiency of the device random; the invasive measurement is energy consuming and disruptive.
L'invention a donc plus particulièrement pour but de supprimer ces inconvénients. A cet effet, elle propose un dispositif de détection de la puissance instantanée d'un circuit d'amplification de puissance radiofréquences comportant un amplificateur de puissance qui reçoit sur ses entrées un signal radio à amplifier ainsi qu'éventuellement un signal de consigne de puissance, cet amplificateur étant alimenté par un circuit d'alimentation en énergie électrique.The object of the invention is therefore more particularly to eliminate these disadvantages. For this purpose, it proposes a device for detecting the instantaneous power of a radiofrequency power amplification circuit comprising a power amplifier which receives on its inputs a radio signal to be amplified as well as possibly a power reference signal, this amplifier being powered by a power supply circuit.
Selon l'invention, ce dispositif de détection consiste en un dispositif de mesure sans contact d'un paramètre représentatif du courant d'alimentation de l'amplificateur, ce circuit de détection étant isolé galvaniquement vis-à-vis du circuit d'alimentation, et en un circuit d'amplification qui fournit le signal de puissance mesuré.According to the invention, this detection device consists of a non-contact measurement device of a parameter representative of the supply current of the amplifier, this detection circuit being galvanically isolated from the supply circuit, and an amplification circuit that provides the measured power signal.
Ce dispositif de détermination de la puissance instantanée d'un amplificateur radiofréquence pourra être intégré dans le dispositif de régulation de la puissance de sortie dudit amplificateur. Cette détermination pourra consister en la mesure sans contact, et en maintenant l'isolation galvanique, d'un paramètre représentatif du courant d'alimentation de l'amplificateur. Le dispositif pourra être constitué d'un capteur et de son circuit d'alimentation et d'amplification. En sortie du circuit d'amplification, un signal représentatif de la puissance absorbée par l'amplificateur, prêt à être traité par les autres constituants du circuit de régulation sera alors fourni.This device for determining the instantaneous power of a radio frequency amplifier may be integrated into the device for regulating the output power of said amplifier. This determination may consist in the measurement without contact, and maintaining the galvanic isolation, of a parameter representative of the supply current of the amplifier. The device may consist of a sensor and its power supply and amplification circuit. At the output of the amplification circuit, a signal representative of the power absorbed by the amplifier, ready to be processed by the other constituents of the regulation circuit will then be provided.
Grâce à ces dispositions, il est possible d'effectuer une calibration de la puissance de sortie de l'amplificateur de puissance.Thanks to these arrangements, it is possible to perform a calibration of the power output of the power amplifier.
Avantageusement, le dispositif de mesure sans contact pourra comprendre un dispositif de détection magnétique tel qu'une boucle magnétique, un capteur à effet Hall, une magnétorésistance, un composant "Flux Gâte" ..).Advantageously, the non-contact measuring device may comprise a magnetic detection device such as a magnetic loop, a Hall effect sensor, a magnetoresistance, a "flux gate" component, etc.).
Un avantage important de la solution selon l'invention consiste en ce qu'elle évite la perte significative de puissance d'alimentation induite par la résistance - A - en série utilisée dans la méthode à contrôle de courant. Cela améliore nettement le rendement de l'ensemble amplificateur de puissance/mesure de puissance.An important advantage of the solution according to the invention is that it avoids the significant loss of power supply induced by the resistance. - A - in series used in the current control method. This significantly improves the performance of the power amplifier / power meter assembly.
La mesure est effectuée en préservant un isolement galvanique entre le circuit de mesure et le circuit d'alimentation : ils ne sont pas directement reliés.The measurement is made by preserving a galvanic isolation between the measuring circuit and the supply circuit: they are not directly connected.
L'isolement galvanique vis-à-vis de la source d'énergie fait disparaître le risque de détérioration du circuit d'amplification de la mesure par décharge électrostatique (la source d'énergie est accessible depuis l'extérieur du système, d'où le risque de propagation de décharge électrostatique).The galvanic isolation from the power source eliminates the risk of deterioration of the amplification circuit of the electrostatic discharge measurement (the energy source is accessible from outside the system, hence the risk of propagation of electrostatic discharge).
L'isolement galvanique vis-à-vis de la source d'énergie élimine le mode commun en entrée du circuit d'amplification, ce qui simplifie l'amplification.The galvanic isolation from the power source eliminates the common mode at the input of the amplification circuit, which simplifies the amplification.
Un mode d'exécution d'un dispositif selon l'invention sera décrit ci-après, à titre d'exemple non limitatif, avec référence au dessin annexé dans lequel :One embodiment of a device according to the invention will be described below, by way of non-limiting example, with reference to the accompanying drawing in which:
La figure unique est un schéma de principe d'un dispositif de régulation de la puissance délivrée par un amplificateur de puissance radiofréquences utilisant un circuit de mesure par effet Hall de la consommation basses fréquences de l'amplificateur.The single figure is a block diagram of a power control device delivered by a radio frequency power amplifier using a Hall effect measurement circuit of the low frequency consumption of the amplifier.
Dans cet exemple, l'amplificateur de puissance 1, de type classique, débite dans une antenne 2 et est destiné à émettre un signal radioélectrique dont la puissance est exactement celle requise par les conditions spécifiques de transmission.In this example, the power amplifier 1, of conventional type, delivers in an antenna 2 and is intended to emit a radio signal whose power is exactly that required by the specific transmission conditions.
Cet amplificateur 1 reçoit sur l'une de ses entrées 3 un signal radio et sur une autre entrée 4 un signal de consigne de puissance délivré par un circuit de traitement 5, par exemple un processeur. Il est alimenté par une source d'énergie électrique 6.This amplifier 1 receives on one of its inputs 3 a radio signal and on another input 4 a power reference signal delivered by a processing circuit 5, for example a processor. It is powered by an electric power source 6.
Conformément à l'invention, le courant d'alimentation de l'amplificateur de puissance 1 est mesuré par un capteur à effet Hall 7 alimenté par un circuit de polarisation à faible puissance 8 indépendant du circuit d'alimentation de l'amplificateur 1. Ce capteur à effet Hall 7 comprend, de façon classique, une plaque semi-conductrice à quatre contacts dont deux contacts opposés 9, 10 sont connectés au circuit de polarisation 8 de manière à engendrer entre ces deux contacts un courant électrique.According to the invention, the power supply current of the power amplifier 1 is measured by a Hall effect sensor 7 powered by a low power polarization circuit 8 independent of the supply circuit of the amplifier 1. Hall effect sensor 7 comprises, in a conventional manner, a four-contact semiconductor plate whose two opposite contacts 9, 10 are connected to the bias circuit 8 so as to generate between these two contacts an electric current.
La tension électrique Vn qui s'établit entre les deux autres contacts notamment sous l'effet du champ magnétique B engendré par le courant d'alimentation I de l'amplificateur 1 est appliquée à un circuit d'amplification 11.The electrical voltage V n which is established between the two other contacts in particular under the effect of the magnetic field B generated by the supply current I of the amplifier 1 is applied to an amplification circuit 11.
Cette tension Vn s'exprime simplement par la relation :This voltage V n is expressed simply by the relation:
VH = Voff + KHIbiasB (1)V H = V off + K H I b i as B (1)
Voff est la tension d'offset du capteur 7, KH est une constante dépendant du type de capteur, I^ias le courant d'alimentation du capteur 7.V off is the offset voltage of the sensor 7, K H is a constant depending on the sensor type, I ^ i as the feed stream of the sensor 7.
Le champ magnétique B est lui-même généré par le courant d'alimentation I de l'amplificateur de puissance 1 selon la relation bien connue :The magnetic field B is itself generated by the power supply current I of the power amplifier 1 according to the well-known relation:
B = ϋs* (2)B = ϋs * (2)
2πr2πr
I étant le courant d'alimentation de l'amplificateur de puissance, r la distance entre le fil d'alimentation et le point considéré (loi de Biot et Savart). La tension VH est donc reliée au courant d'alimentation de l'amplificateur de puissance 1 par la relation :I being the supply current of the power amplifier, r the distance between the supply wire and the point considered (Biot and Savart law). The voltage V H is thus connected to the supply current of the power amplifier 1 by the relation:
μoiμ o i
VH = Voff+ KHIbiaS (3)V H = V off + K H Ibia S (3)
2πr2πr
La tension VH, amplifié dans le circuit d'amplification 11, est transmise au circuit de traitement 5. Ce circuit de traitement 5 comprend des moyens 12 de mesure de cette tension et des moyens 13 permettant d'engendrer un signal de consigne de puissance approprié pour effectuer une calibration entre le courant d'alimentation de l'amplificateur de puissance et sa puissance de sortie. Une telle calibration s'effectue d'une façon similaire à celle qui est effectuée dans la méthode à contrôle de courant précédemment évoquée.The voltage V H , amplified in the amplification circuit 11, is transmitted to the processing circuit 5. This processing circuit 5 comprises means 12 for measuring this voltage and means 13 for generating a power reference signal. suitable for performing a calibration between the supply current of the power amplifier and its power output. Such a calibration is carried out in a manner similar to that performed in the current-control method previously mentioned.
Avantageusement, le circuit du capteur à effet Hall 7 pourra être alimenté de façon discontinue, étant entendu que pour produire un signal directement proportionnel au courant d'alimentation de l'amplificateur de puissance, le capteur à effet Hall devra être alimenté en courant constant pendant la période de mesure.Advantageously, the Hall effect sensor circuit 7 may be fed discontinuously, it being understood that in order to produce a signal directly proportional to the supply current of the power amplifier, the Hall effect sensor will have to be supplied with constant current during the measurement period.
Cette solution permet de réduire encore plus la consommation d'énergie électrique sans affecter l'isolation galvanique vis-à-vis du circuit d'amplification de puissance.This solution makes it possible to further reduce the consumption of electrical energy without affecting the galvanic isolation with respect to the power amplification circuit.
Par ailleurs, le capteur à effet Hall 7 pourra être intégré dans la puce (en silicium ou arséniure de gallium par exemple) de l'un des composants de l'ensemble d'émission (par exemple le contrôleur de puissance ou l'amplificateur de puissance).Furthermore, the Hall effect sensor 7 may be integrated in the chip (silicon or gallium arsenide for example) of one of the components of the transmission assembly (for example the power controller or the amplifier of power).
Bien entendu, l'invention ne se limite pas au mode d'exécution précédemment décrit. Ainsi, notamment :Of course, the invention is not limited to the embodiment described above. Thus, in particular:
• La mesure du courant pourra être effectuée sur le circuit d'alimentation d'un composant intégrant entre autres fonctions l'amplificateur de puissance 1.• The measurement of the current can be performed on the power supply circuit of a component incorporating among other functions the power amplifier 1.
• Le dispositif de mesure de courant d'alimentation de l'amplificateur de puissance 1 pourra comprendre tout type de capteur magnétique autre qu'un capteur à effet Hall, délivrant une quantité électrique proportionnelle au champ magnétique généré par le courant d'alimentation I. Ainsi, on pourra par exemple utiliser un capteur à magnétorésistance géante pour effectuer la mesure du courant d'alimentation. The device for measuring the power supply current of the power amplifier 1 may comprise any type of magnetic sensor other than a Hall effect sensor, delivering an electric quantity proportional to the magnetic field generated by the supply current I. Thus, for example, it is possible to use a giant magnetoresistance sensor to measure the supply current.

Claims

Revendications claims
1. Dispositif de détermination de la puissance de sortie d'un amplificateur de puissance radiofréquences (1) d'un circuit d'émission, ledit amplificateur de puissance (1) recevant sur ses entrées (3, 4) un signal radio à amplifier ainsi qu'éventuellement un signal de consigne de puissance, et étant alimenté par un circuit d'alimentation en énergie électrique (6), caractérisé en ce que la détermination de puissance de sortie de l'amplificateur est effectuée grâce à des moyens de mesure non invasive de la consommation basse fréquence et en ce qu'il comprend un circuit de détection comportant un dispositif de mesure sans contact (7) d'un paramètre représentatif du courant d'alimentation (I) de l'amplificateur (1), ce circuit de détection étant isolé galvaniquement vis-à-vis du circuit d'alimentation (6), un circuit d'amplification (11) qui fournit un signal de puissance mesuré.Device for determining the output power of a radio frequency power amplifier (1) of a transmission circuit, said power amplifier (1) receiving at its inputs (3, 4) a radio signal to be amplified and only optionally a power reference signal, and being powered by an electric power supply circuit (6), characterized in that the output power determination of the amplifier is carried out by means of non-invasive measuring means of the low frequency consumption and in that it comprises a detection circuit comprising a non-contact measuring device (7) of a parameter representative of the supply current (I) of the amplifier (1), this circuit of detection being galvanically isolated from the supply circuit (6), an amplification circuit (11) which provides a measured power signal.
2. Dispositif selon la revendication 1, caractérisé en ce que le signal de consigne de puissance est obtenu à partir du signal de puissance mesuré.2. Device according to claim 1, characterized in that the power reference signal is obtained from the measured power signal.
3. Dispositif selon la revendication 1, caractérisé en ce que le susdit dispositif de mesure (7) comprend un dispositif de détection magnétique délivrant une quantité électrique proportionnelle au champ magnétique généré par le courant d'alimentation (I) de l'amplificateur de puissance (1).3. Device according to claim 1, characterized in that the aforesaid measuring device (7) comprises a magnetic detection device delivering an electrical quantity proportional to the magnetic field generated by the supply current (I) of the power amplifier (1).
4. Dispositif selon la revendication 3, caractérisé en ce que le dispositif de détection magnétique comprend un capteur à effet Hall.4. Device according to claim 3, characterized in that the magnetic detection device comprises a Hall effect sensor.
5. Dispositif selon la revendication 1 , caractérisé en ce que le dispositif de détection magnétique comprend une boucle magnétique.5. Device according to claim 1, characterized in that the magnetic detection device comprises a magnetic loop.
6. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de détection magnétique comprend une magnétorésistance.6. Device according to claim 1, characterized in that the magnetic detection device comprises a magnetoresistance.
7. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de détection magnétique comprend un composant "Flux Gâte".7. Device according to claim 1, characterized in that the magnetic detection device comprises a component "flux gate".
8. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de détection magnétique comprend un capteur à magnétorésistance géante.8. Device according to claim 1, characterized in that the magnetic detection device comprises a giant magnetoresistance sensor.
9. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le susdit dispositif de mesure (7) est alimenté de façon discontinue.9. Device according to one of the preceding claims, characterized in that the aforesaid measuring device (7) is fed discontinuously.
10. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la mesure réalisée par le dispositif de mesure (7) est effectuée sur le circuit d'alimentation d'un composant intégrant entre autres fonctions l'amplificateur de puissance.10. Device according to one of the preceding claims, characterized in that the measurement made by the measuring device (7) is performed on the supply circuit of a component integrating among other functions the power amplifier.
11. Dispositif selon la revendication 4, caractérisé en ce que le capteur à effet Hall est intégré dans la puce de l'un des composants du circuit d'émission.11. Device according to claim 4, characterized in that the Hall effect sensor is integrated in the chip of one of the components of the transmission circuit.
12. Dispositif selon la revendication 4, caractérisé en ce que la tension engendrée par le capteur à effet Hall est amplifiée dans le circuit d'amplification (11) et est transmise à un circuit de traitement (5) comportant des moyens (12) de mesure de cette tension et des moyens (13) permettant d'engendrer un signal de consigne de puissance approprié pour effectuer une calibration entre le courant d'alimentation de l'amplificateur de puissance (1) et sa puissance de sortie. Device according to Claim 4, characterized in that the voltage generated by the Hall effect sensor is amplified in the amplification circuit (11) and is transmitted to a circuit of process (5) comprising means (12) for measuring this voltage and means (13) for generating a power reference signal suitable for calibrating between the supply current of the power amplifier (1 ) and its output power.
PCT/FR2007/001984 2006-12-06 2007-12-04 Device for determining the output power of a radiofrequency power amplifier by the contactless detection of its power supply current WO2008074946A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0610661 2006-12-06
FR0610661A FR2909784B1 (en) 2006-12-06 2006-12-06 DEVICE FOR CONTROLLING THE OUTPUT POWER OF A RADIO FREQUENCY POWER AMPLIFIER.

Publications (1)

Publication Number Publication Date
WO2008074946A1 true WO2008074946A1 (en) 2008-06-26

Family

ID=38180436

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2007/001984 WO2008074946A1 (en) 2006-12-06 2007-12-04 Device for determining the output power of a radiofrequency power amplifier by the contactless detection of its power supply current

Country Status (2)

Country Link
FR (1) FR2909784B1 (en)
WO (1) WO2008074946A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114019226A (en) * 2021-10-27 2022-02-08 北京大学 Non-contact electric quantity measuring and recording device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2820211A1 (en) * 2001-02-01 2002-08-02 Schlumberger Ind Sa Hall effect cell for use as a current measurement device or current transducer in which the effective current is measured by subtraction of a value representative of noise input
US6430402B1 (en) * 1998-09-14 2002-08-06 Conexant Systems, Inc. Power amplifier saturation prevention method, apparatus, and communication system incorporating the same
US20050261036A1 (en) * 2001-09-27 2005-11-24 Sekine Shu-Ichi Portable type radio equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6430402B1 (en) * 1998-09-14 2002-08-06 Conexant Systems, Inc. Power amplifier saturation prevention method, apparatus, and communication system incorporating the same
FR2820211A1 (en) * 2001-02-01 2002-08-02 Schlumberger Ind Sa Hall effect cell for use as a current measurement device or current transducer in which the effective current is measured by subtraction of a value representative of noise input
US20050261036A1 (en) * 2001-09-27 2005-11-24 Sekine Shu-Ichi Portable type radio equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114019226A (en) * 2021-10-27 2022-02-08 北京大学 Non-contact electric quantity measuring and recording device

Also Published As

Publication number Publication date
FR2909784B1 (en) 2009-02-27
FR2909784A1 (en) 2008-06-13

Similar Documents

Publication Publication Date Title
WO2008074946A1 (en) Device for determining the output power of a radiofrequency power amplifier by the contactless detection of its power supply current
FR2561769A1 (en) IMPEDANCE ADAPTATION CONTROL METHOD IN LOW NOISE RECEPTION CHAINS AND MINIATURE MICROWAVE THERMOMETER FOR IMPLEMENTING THE METHOD
EP2543142A1 (en) Very high fidelity audio amplifier
FR2465373A1 (en) CIRCUIT FOR DETECTING THE STATUS OF AN ISOLATED SWITCH CONTACT AND A TIRE PRESSURE ADJUSTING INSTALLATION HAVING SUCH A DEVICE
EP0308293B1 (en) Controlled output power device for a class-c amplifier
EP1041711A1 (en) Electronic device with a power amplifier
EP2830215B1 (en) Load preamplifier
FR2560468A1 (en) TRANSISTOR AMPLIFIER STAGE POLARIZATION DEVICE AND ITS USE IN SUCH A FLOOR
FR2947119A1 (en) METHOD AND SYSTEM FOR OPTIMALLY ADAPTING SOURCE IMPEDANCE INTO ENTRY OF ELECTRONIC COMPONENTS, PARTICULARLY TRANSISTORS
FR2677823A1 (en) AMPLIFIER DEVICE.
EP3186894B1 (en) Device comprising a radio communication terminal
EP0356273B1 (en) Main and secondary optical sensor device
EP1187316B1 (en) Method and Control Circuit for Use of a HBT Transistor Power Amplifier in a Transmitter Using Zero IF Architecture
FR3127857A1 (en) Radio frequency receiver
EP3235124B1 (en) Receiver chain for electromagnetic pulse signals
US20240111003A1 (en) Magnetic field measuring apparatus
EP0050583A1 (en) Alternating voltage to direct current converter and oscillator circuit comprising said converter
FR2715869A1 (en) High frequency industrial treatment installation using two signals
FR3121755A1 (en) Device for detecting user equipment for a motor vehicle
WO2018202958A1 (en) Method for controlling the matching of an antenna to a transmission path, and corresponding device
WO2018020102A1 (en) Magnetic field sensor
FR3119250A1 (en) LOW SIDE DRIVER FOR LASER DIODE
FR3066858B1 (en) METHOD FOR MINIMIZING DISTORTION OF A SIGNAL IN A RADIO FREQUENCY CIRCUIT
EP1017165A1 (en) Method to control the output power of a power amplifier
EP2032974A1 (en) Method and apparatus for optically characterizing the doping of a substrate

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07870374

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07870374

Country of ref document: EP

Kind code of ref document: A1