CN102739278A - 2.4G wireless transceiver chip with an intermediate frequency of 1MHz - Google Patents
2.4G wireless transceiver chip with an intermediate frequency of 1MHz Download PDFInfo
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Abstract
The invention discloses a 2.4G wireless transceiver chip with an intermediate frequency of 1MHz. The 2.4G wireless transceiver chip comprises a radio frequency (RF) front-end integrated circuit and a RF periphery matching integrated circuit. The RF front-end integrated circuit comprises a 2.4GHz GFSK transmitting module, a 2.4GHz GFSK receiving module, a RF frequency synthesizer, an analog phase-lock loop module, and a radio frequency switch, wherein the RF frequency synthesizer is connected to the 2.4GHz GFSK transmitting module and the 2.4GHz GFSK receiving module, and the analog phase-lock loop module is connected to the 2.4GHz GFSK transmitting module, the 2.4GHz GFSK receiving module, and the RF frequency synthesizer. The RF periphery matching integrated circuit comprises a low-dropout regulator, an oscillation buffer, and a processing module, wherein the processing module is connected to the 2.4GHz GFSK transmitting module, the 2.4GHz GFSK receiving module, the RF frequency synthesizer, the analog phase-lock loop module and the radio frequency switch of the RF front-end integrated circuit. The 2.4G wireless transceiver chip of the invention realizes a total integration of the RF periphery matching, and achieves the intermediate frequency of 1MHz. Under the condition of 1MHz intermediate frequency, the chip is more power saving, thereby decreasing pressure in designing a printed circuit board, reducing cost, and increasing reliability.
Description
Technical field
The invention belongs to the electronic communication field, relating to a kind of intermediate frequency is the 2.4G radio transmitting and receiving chip of 1MHz.
Background technology
Existing 2.4G radio transmitting and receiving chip is of a great variety, as: A7125 is the radio frequency chip of a CMOS processing procedure, is applicable to the rf chip of 2.4G ISM band, is that industry is applied to the minimum multi-channel chip of low-consumption wireless product systems cost.Functions such as the integrated whole processing data packets of A7125 chip, fifo buffer, radio wakeup; Its characteristic is: operating frequency is 2400～2483MHz, double modulation model F SK/GFSK, and operating voltage is 2.25～2.75V; Operating current is TX 16mA (0dBm), RX 18mA; Power output able to programme is 0～4dBm; Receiving sensitivity is-90dBm (2Mbps); Standby current is 1.5uA; The programmable data rate reaches as high as 2Mbps.
NRF401 is that the number of the up-to-date release of Norway Nordic company passes frequency range 433MHz monolithic wireless receiving and dispatching one chip.High-frequency emission that this chip is integrated, high frequency receive, functions such as PLL is synthetic, FSK modulation, FSK demodulation, multichannel switching, have excellent performance, characteristics such as low in energy consumption, easy to use.The peripheral cell of NRF401 does not seldom have debugging unit, brings great convenience for development and production.The working channel of NRF401 is 433.92MHz/434.33MHz; Modulation system: FSK; Frequency deviation: 15kHz; Radio frequency power output 0.4k Ω, 3V, 10dBm; Receiving sensitivity 0.4k Ω, BR=20kbit/s, BER＜10 ,-105dBm; Maximum numeric code rate: the 20kbit/s that transmits; Be suitable for voltage range: 2.75～5.25V; Accepting state power consumption: 250uA; Emission state power consumption: 8mA; Wait state power consumption: 8uA.
A7105 is a low cost and the radio frequency chip that is applicable to the wireless receiving and dispatching one of 2.4G ISM band; Include highly sensitive receiver (1Mbps-93dBm); So in 10m uses with interior product, can lower the power output (0dBmto10dBm) of RF significantly; Avoid radio frequency products that human body is shone into possible infringement, can adapt to the application of 50 meters general environments simultaneously again.All parameters of A7105 can be provided with through SPI mouth configuration internal register; The highest speed can reach 500kbps; Adapt to the SPI control of 4 lines or 3 lines, the processing at RFDATA can have 2 kinds of patterns available in addition: FIFO (data of utilizing the inner memory elder generation storage of RF will launch/receive) and Direct (directly emission/reception).Under fifo mode, also support CRC (CRC16), FEC (increasing the sensitivity of 2dBm approximately), data whitening (can be considered data encryption), the coding/decoding of Manchestercode.Build RSSI and temperature sensor in the A7105, detect the influence of environment RFIC, and in build 1ch ADC and can detect working voltage.Its working band is the 2400-2483MHz ISM band, and modulation system is the FSK/GFSK modulation, and received current is 16mA; Emission current is 19mA (output 0dBm), and quiescent current is less than 1uA, built-in RC oscillator; Sensitivity is-99dBm250kbps that-96dBm500kbps receives and dispatches independently 64 byte FIFO; Support 16 CRC, FEC, Manchestercode, datawhitening.
In sum, the function of 2.4G radio transmitting and receiving chip is very ripe, but its function that stresses separately to realize is different, structurally also just different.The present invention promptly provides a kind of can realize the fully integrated 2.4G radio transmitting and receiving chip of the peripheral coupling of RF.
Summary of the invention
Technical problem to be solved by this invention is: it is the 2.4G radio transmitting and receiving chip of 1MHz that a kind of intermediate frequency is provided, and this chip has realized that the peripheral coupling of RF is fully integrated.
For solving the problems of the technologies described above, the present invention adopts following technical scheme.
A kind of intermediate frequency is the 2.4G radio transmitting and receiving chip of 1MHz, comprises the peripheral matching integrated circuit of RF radio-frequency front-end integrated circuit and RF; Said RF radio-frequency front-end integrated circuit comprises 2.4GHz GFSK transmitter module, 2.4GHz GFSK receiver module, RF frequency synthesizer, analog phase-locked look module and RF switch; Said RF switch links to each other antenna respectively with 2.4GHz GFSK receiver module with 2.4GHz GFSK transmitter module; The RF frequency synthesizer links to each other with 2.4GHz GFSK receiver module with 2.4GHz GFSK transmitter module respectively; The analog phase-locked look module links to each other with the RF frequency synthesizer with 2.4GHz GFSK transmitter module, 2.4GHz GFSK receiver module respectively; The peripheral matching integrated circuit of RF comprises low-dropout regulator, oscillating buffer and processing module; Said processing module respectively with RF radio-frequency front-end integrated circuit in 2.4GHz GFSK transmitter module, 2.4GHz GFSK receiver module, RF frequency synthesizer, analog phase-locked look module link to each other with RF switch; Said oscillating buffer links to each other with processing module with said RF frequency synthesizer respectively.
As a kind of preferred version of the present invention, said RF frequency synthesizer comprises crystal oscillator, frequency synthesizer, voltage controlled oscillator; Said crystal oscillator is in order to provide local oscillation signal; Crystal oscillator links to each other with voltage controlled oscillator through frequency synthesizer, and voltage controlled oscillator is controlled frequency of oscillation through control voltage; The RF frequency synthesizer is the phase-locked loop of a fractional frequency division, carries out the decimal frequency multiplication in order to the reference clock that crystal oscillator is produced, and precision reaches 1Hz.
As another kind of preferred version of the present invention, said 2.4GHz GFSK receiver module comprises low noise amplifier, frequency mixer, band pass filter, the analog to digital converter that links to each other successively; Said low noise amplifier is in order to the RF signal of collecting and amplification receives from antenna; Said frequency mixer links to each other with said voltage controlled oscillator through a multiphase filter, in order to the RF signal after amplifying is carried out down-conversion and shifts to operation, is down-converted to 1MHz; The RF signal of said band pass filter after to frequency conversion carries out filtering; Said analog to digital converter is in order to become digital signal with filtered RF conversion of signals.
As another preferred version of the present invention, the centre frequency of said band pass filter is 1MHz, and bandwidth is ± 600KHz; Said analog to digital converter is 9 ADC.
As another preferred version of the present invention, said 2.4GHz GFSK transmitter module comprises power amplifier, digital to analog converter; Said digital to analog converter is in order to convert digital signal to analog signal; Said digital to analog converter links to each other with power amplifier through said voltage controlled oscillator, and said power amplifier is in order to amplify signal the back through the antenna emission; 2.4GHz the GFSK transmitter module adopts reactance modulation system, by digital to analog converter digital signal is converted into analog signal, then voltage controlled oscillator is carried out the GFSK adjustment, at last by power amplifier with the signal amplifying emission.
As another preferred version of the present invention, said processing module is integrated with digital state machine, register module, frame data buffer device and logic module, forward error correction alarm module, cyclic redundancy check error alarm module.
Beneficial effect of the present invention is: the present invention can constant transmissions 1Mbps data, and transmitting power can reach 6dBm, and power consumption is merely 20mA, and sensitivity can reach-87dBm, and power consumption is merely 15mA, and distance can reach 50m; The present invention has realized that the peripheral coupling of RF is fully integrated, has accomplished the intermediate frequency of 1MHz simultaneously; Under the condition of 1MHz intermediate frequency, chip according to the invention power saving more, the peripheral matching integrated circuit of RF can reduce the pressure of PCB design greatly, has reduced cost, has increased reliability.
Description of drawings
Fig. 1 is the structural representation of the 2.4G radio transmitting and receiving chip of 1MHz for intermediate frequency of the present invention;
Fig. 2 is the structural representation of the peripheral matching integrated circuit of RF of the present invention.
Embodiment
Do further explain below in conjunction with the accompanying drawing specific embodiments of the invention.
Embodiment one
Present embodiment provides a kind of intermediate frequency to be the 2.4G radio transmitting and receiving chip of 1MHz, and is as shown in Figure 1, comprises the peripheral matching integrated circuit of RF radio-frequency front-end integrated circuit and RF.
[RF radio-frequency front-end integrated circuit]
Said RF radio-frequency front-end integrated circuit comprises 2.4GHz GFSK transmitter module, 2.4GHz GFSK receiver module, RF frequency synthesizer, analog phase-locked look (Analog Phase Locked Loop; APLL) module, RF switch (Radio FrequencySwitch; RFSW), as shown in Figure 2.Antennal interface ANT links to each other respectively with 2.4GHz GFSK receiver module with 2.4GHz GFSK transmitter module through RF switch with ANTb; The RF frequency synthesizer links to each other with 2.4GHz GFSK receiver module with 2.4GHz GFSK transmitter module respectively; The analog phase-locked look module links to each other with the RF frequency synthesizer with 2.4GHz GFSK transmitter module, 2.4GHz GFSK receiver module respectively.
Said RF frequency synthesizer comprise crystal oscillator (XO), frequency synthesizer (synthesizer), voltage controlled oscillator (VCO), multiphase filter (Poly phase filter, PPF); Said crystal oscillator provides local oscillation signal, and voltage controlled oscillator is controlled frequency of oscillation through control voltage.The RF frequency synthesizer be one can fractional frequency division phase-locked loop, can the reference clock that crystal oscillator produces be carried out the decimal frequency multiplication, precision can reach 1Hz.For emission provides stable frequency, for reception provides local oscillation signal.Said multiphase filter is in order to filtering out of band signal and image signal.
Said 2.4GHz GFSK receiver module comprises low noise amplifier (LNA), frequency mixer (IQMIXER), band pass filter (BPF), the analog to digital converter (ADC) that links to each other successively; The RF signal that antenna receives is input mixer after low noise amplifier is collected and amplified at first; Frequency mixer carries out down-conversion and shifts to operation the signal after amplifying; After being down-converted to 1MHz; Through a centre frequency is 1MHz, bandwidth for the band pass filter of ± 600KHz carries out preliminary filtering, after analog to digital converter converts digital signal to, is input to numerical portion and handles.That said frequency mixer will receive the output of signal and voltage controlled oscillator and carry out Frequency mixing processing through the oscillator signal of multiphase filter filtering, the signal after the mixing enters into band pass filter.Said analog to digital converter is 9 ADC.
Said 2.4GHz GFSK transmitter module comprises power amplifier (PA), digital to analog converter (DAC); Digital signal after digital to analog converter will be handled converts analog signal to, and analog signal sends to power amplifier after the voltage controlled oscillator modulation, and the signal after power amplifier amplifies is through the antenna emission.2.4GHz what the GFSK transmitter module adopted is reactance modulation system; By DAC digital signal is converted into analog signal; Then VCO is carried out GFSK (Gauss frequency shift keying, GFSK Gaussian Frequency Shift Keying) adjustment, go out the signal amplifying emission by PA at last.
[the peripheral matching integrated circuit of RF]
The peripheral matching integrated circuit of RF comprises low-dropout regulator (Low dropout voltage regulators), oscillating buffer (oscillator/buffer), processing module.The input interface of said low-dropout regulator is LDO_VDD (being the 21st interface of chip), and output interface is LDO_OUT (being the 20th interface of chip).Said processing module is integrated with digital state machine (Digital state machine), register module (Register block), frame data buffer device and logic module (Data framing buffer and logic block), forward error correction alarm (Forward Error Correction; FEC) module, cyclic redundancy check error alarm (Cyclical Redundancy Correction, CRC) module etc.; The interface of said processing module has VDD_IO interface (being the 10th interface of chip); SPI_SS interface (being the 11st interface of chip); CLK interface (being the 14th interface of chip); MISO/12C_DAT interface (being the 17th interface of chip); MOSI/A4 interface (being the 16th interface of chip); 12C_SEL interface (being the 15th interface of chip); Fifo interface (being the 8th interface of chip); PKT interface (being the 13rd interface of chip); RST_n interface (being the 18th interface of chip); BRCLK interface (being the 12nd interface of chip); Wherein SPI_SS interface (being the 11st interface of chip), CLK interface (being the 14th interface of chip), MISO/12C_DAT interface (being the 17th interface of chip) and MOSI/A4 interface (being the 16th interface of chip) are data baseband interface (digital baseband interface); Said processing module respectively with RF radio-frequency front-end integrated circuit in 2.4GHz GFSK transmitter module, 2.4GHz GFSK receiver module, RF frequency synthesizer, analog phase-locked look module link to each other with RF switch.Said oscillating buffer links to each other with processing module with said RF frequency synthesizer respectively, and the input interface of oscillating buffer is XTALI (being the 24th interface of chip), and output interface is XTALO (being the 23rd interface of chip).
Said intermediate frequency is that the 1st, 2,5,6,7,19,22 interface of the 2.4G radio transmitting and receiving chip of 1MHz is power interface, the 9th interface ground connection.
The present invention is a complete 2.4G radio transmitting and receiving chip, it is integrated RF radio-frequency front-end, GFSK modulation; With the transfer of data base band, can constant transmissions 1Mbps data, transmitting power can reach 6dBm; The emission power consumption is merely 20mA; Sensitivity-87dBm receives power consumption and is merely 15mA, and distance can reach 50m.
Compare existing 2.4G circuit, chip of the present invention has realized that the peripheral coupling of RF is fully integrated, has accomplished the intermediate frequency of 1MHz simultaneously.Under the condition of 1MHz intermediate frequency, chip according to the invention power saving more, the peripheral matching integrated circuit of RF can reduce the pressure of PCB layout (PCB design) greatly, has reduced cost, has increased reliability.
Description of the invention and application are illustrative, are not to want with scope restriction of the present invention in the above-described embodiments.Here the distortion of the embodiment that is disclosed and change are possible, and the replacement of embodiment is known with the various parts of equivalence for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present invention or substantive characteristics, and the present invention can be with other forms, structure, layout, ratio, and realize with other elements, material and parts.
Claims (6)
1. the 2.4G radio transmitting and receiving chip that intermediate frequency is 1MHz is characterized in that: comprise the peripheral matching integrated circuit of RF radio-frequency front-end integrated circuit and RF;
Said RF radio-frequency front-end integrated circuit comprises 2.4GHz GFSK transmitter module, 2.4GHz GFSK receiver module, RF frequency synthesizer, analog phase-locked look module and RF switch; Said RF switch links to each other antenna respectively with the 2.4GHzGFSK receiver module with 2.4GHz GFSK transmitter module; The RF frequency synthesizer links to each other with 2.4GHz GFSK receiver module with 2.4GHz GFSK transmitter module respectively; The analog phase-locked look module links to each other with the RF frequency synthesizer with 2.4GHz GFSK transmitter module, 2.4GHz GFSK receiver module respectively;
The peripheral matching integrated circuit of RF comprises low-dropout regulator, oscillating buffer and processing module; Said processing module respectively with RF radio-frequency front-end integrated circuit in 2.4GHz GFSK transmitter module, 2.4GHz GFSK receiver module, RF frequency synthesizer, analog phase-locked look module link to each other with RF switch; Said oscillating buffer links to each other with processing module with said RF frequency synthesizer respectively.
2. the 2.4G radio transmitting and receiving chip that intermediate frequency according to claim 1 is 1MHz is characterized in that: said RF frequency synthesizer comprises crystal oscillator, frequency synthesizer, voltage controlled oscillator; Said crystal oscillator is in order to provide local oscillation signal; Crystal oscillator links to each other with voltage controlled oscillator through frequency synthesizer, and voltage controlled oscillator is controlled frequency of oscillation through control voltage; The RF frequency synthesizer is the phase-locked loop of a fractional frequency division, carries out the decimal frequency multiplication in order to the reference clock that crystal oscillator is produced, and precision reaches 1Hz.
3. the 2.4G radio transmitting and receiving chip that intermediate frequency according to claim 2 is 1MHz is characterized in that: said 2.4GHz GFSK receiver module comprises low noise amplifier, frequency mixer, band pass filter, the analog to digital converter that links to each other successively; Said low noise amplifier is in order to the RF signal of collecting and amplification receives from antenna; Said frequency mixer links to each other with said voltage controlled oscillator through a multiphase filter, in order to the RF signal after amplifying is carried out down-conversion and shifts to operation, is down-converted to 1MHz; The RF signal of said band pass filter after to frequency conversion carries out filtering; Said analog to digital converter is in order to become digital signal with filtered RF conversion of signals.
4. the 2.4G radio transmitting and receiving chip that intermediate frequency according to claim 3 is 1MHz is characterized in that: the centre frequency of said band pass filter is 1MHz, and bandwidth is ± 600KHz; Said analog to digital converter is 9 ADC.
5. the 2.4G radio transmitting and receiving chip that intermediate frequency according to claim 4 is 1MHz is characterized in that: said 2.4GHz GFSK transmitter module comprises power amplifier, digital to analog converter; Said digital to analog converter is in order to convert digital signal to analog signal; Said digital to analog converter links to each other with power amplifier through said voltage controlled oscillator, and said power amplifier is in order to amplify signal the back through the antenna emission; 2.4GHz the GFSK transmitter module adopts reactance modulation system, by digital to analog converter digital signal is converted into analog signal, then voltage controlled oscillator is carried out the GFSK adjustment, at last by power amplifier with the signal amplifying emission.
6. the 2.4G radio transmitting and receiving chip that intermediate frequency according to claim 1 is 1MHz is characterized in that: said processing module is integrated with digital state machine, register module, frame data buffer device and logic module, forward error correction alarm module, cyclic redundancy check error alarm module.
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Cited By (7)
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| CN103647569A (en) * | 2013-06-07 | 2014-03-19 | 孙方霞 | Field wireless help seeking device |
| CN104753516A (en) * | 2015-03-25 | 2015-07-01 | 赵冰 | Single-chip microwave integrated circuit, radio frequency front end circuit device and radar sensor device |
| CN107318062A (en) * | 2017-05-11 | 2017-11-03 | 恒玄科技（上海）有限公司 | A kind of low-power consumption one drag two bluetooth earphone |
| CN108156105A (en) * | 2017-12-27 | 2018-06-12 | 北京航天测控技术有限公司 | The narrowband fsk signal modulating system and method for a kind of variable power/frequency |
| CN108512790A (en) * | 2017-02-27 | 2018-09-07 | 深圳市中兴微电子技术有限公司 | A kind of transceiver machine and terminal |
| CN109660283A (en) * | 2018-12-06 | 2019-04-19 | 成都中宇微芯科技有限公司 | A kind of load antenna receiving and transmitting front end chip |
| US10715898B2 (en) | 2017-05-11 | 2020-07-14 | Bestechnic (Shanghai) Co., Ltd. | Dual-band wireless headphones |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647569A (en) * | 2013-06-07 | 2014-03-19 | 孙方霞 | Field wireless help seeking device |
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| CN108512790A (en) * | 2017-02-27 | 2018-09-07 | 深圳市中兴微电子技术有限公司 | A kind of transceiver machine and terminal |
| CN108512790B (en) * | 2017-02-27 | 2020-11-10 | 深圳市中兴微电子技术有限公司 | Transceiver all-in-one machine and terminal |
| CN107318062A (en) * | 2017-05-11 | 2017-11-03 | 恒玄科技（上海）有限公司 | A kind of low-power consumption one drag two bluetooth earphone |
| US10715898B2 (en) | 2017-05-11 | 2020-07-14 | Bestechnic (Shanghai) Co., Ltd. | Dual-band wireless headphones |
| CN108156105A (en) * | 2017-12-27 | 2018-06-12 | 北京航天测控技术有限公司 | The narrowband fsk signal modulating system and method for a kind of variable power/frequency |
| CN108156105B (en) * | 2017-12-27 | 2020-07-03 | 北京航天测控技术有限公司 | Narrow-band FSK signal modulation system and method with variable power/frequency |
| CN109660283A (en) * | 2018-12-06 | 2019-04-19 | 成都中宇微芯科技有限公司 | A kind of load antenna receiving and transmitting front end chip |
| CN109660283B (en) * | 2018-12-06 | 2022-02-01 | 成都中宇微芯科技有限公司 | Chip-mounted antenna transceiving front-end chip |
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| CN102739278B (en) | 2015-01-07 |
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