CN102739278B - 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 technical field of electronic communication, relate to the 2.4G radio transmitting and receiving chip that a kind of intermediate frequency is 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.The functions such as the whole processing data packets of A7125 integrated 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; Programmable data rate reaches as high as 2Mbps.
NRF401 is that the number of the up-to-date release of Nordic company of Norway passes frequency range 433MHz monolithic wireless receiving and dispatching one chip.This integrated chip functions such as high-frequency emission, high-frequency reception, PLL synthesis, FSK modulation, FSK demodulation, multichannel switching, have excellent performance, the feature such as low in energy consumption, easy to use.The peripheral cell of NRF401 is little, does not have debugging unit, brings great convenience to research 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 transmission numeric code rate: 20kbit/s; 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 is applicable to the radio frequency chip of the wireless receiving and dispatching one of 2.4G ISM band, include highly sensitive receiver (1Mbps@-93dBm), so the power output (0dBmto10dBm) of RF significantly can be lowered in products application within 10m, avoid radio frequency products to shine into possible infringement to human body, the application of 50 meters of general environments can be adapted to again simultaneously.All parameters of A7105 can be arranged by SPI mouth configuration internal register, the highest speed can reach 500kbps, the SPI adapting to 4 lines or 3 lines controls, and 2 kinds of patterns can be had available in addition: FIFO (utilize the memory of RF inside first to store and want the data of transmitting/receiving) and Direct (direct transmitting/receiving) in the process of RFDATA.Under fifo mode, also support CRC (CRC16), FEC (about increasing the sensitivity of 2dBm), data whitening (can be considered data encryption), the coding/decoding of Manchestercode.The built-in RSSI of A7105 and temperature sensor, detect the impact of environment on RFIC, and built-in 1ch ADC can detect use voltage.Its working band is 2400-2483MHz ISM band, modulation system is FSK/GFSK modulation, received current is 16mA, and emission current is 19mA (exporting 0dBm), and quiescent current is less than 1uA, built-in RC oscillator, sensitivity is-99dBm@250kbps ,-96dBm@500kbps, transmitting-receiving 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 stressing separately to realize is different, structurally also just different.Namely the present invention provides a kind of can realize the fully integrated 2.4G radio transmitting and receiving chip of RF periphery coupling.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of intermediate frequency to be the 2.4G radio transmitting and receiving chip of 1MHz, and it is fully integrated that this chip achieves RF periphery coupling.
For solving the problems of the technologies described above, the present invention adopts following technical scheme.
Intermediate frequency is a 2.4G radio transmitting and receiving chip of 1MHz, comprises RF radio-frequency front-end integrated circuit and the peripheral matching integrated circuit of RF; Described RF radio-frequency front-end integrated circuit comprises 2.4GHz GFSK transmitter module, 2.4GHz GFSK receiver module, RF frequency synthesizer, Analogous phase-locking loop module and radio-frequency (RF) switch; Antenna is connected with 2.4GHz GFSK receiver module with 2.4GHz GFSK transmitter module by described radio-frequency (RF) switch respectively; RF frequency synthesizer is connected with 2.4GHz GFSK receiver module with 2.4GHz GFSK transmitter module respectively; Analogous phase-locking loop module is connected with 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; Described processing module is connected with radio-frequency (RF) switch with the 2.4GHz GFSK transmitter module in RF radio-frequency front-end integrated circuit, 2.4GHz GFSK receiver module, RF frequency synthesizer, Analogous phase-locking loop module respectively; Described oscillating buffer is connected with processing module with described RF frequency synthesizer respectively.
As a preferred embodiment of the present invention, described RF frequency synthesizer comprises crystal oscillator, frequency synthesizer, voltage controlled oscillator; Described crystal oscillator is in order to provide local oscillation signal; Crystal oscillator is connected with voltage controlled oscillator by frequency synthesizer, and voltage controlled oscillator controls frequency of oscillation by control voltage; RF frequency synthesizer is the phase-locked loop of a fractional frequency division, and carry out decimal frequency multiplication in order to the reference clock produced by crystal oscillator, precision reaches 1Hz.
As another kind of preferred version of the present invention, described 2.4GHz GFSK receiver module comprises the low noise amplifier, frequency mixer, band pass filter, the analog to digital converter that are connected successively; Described low noise amplifier is in order to collect and to amplify the RF signal received from antenna; Described frequency mixer is connected with described voltage controlled oscillator by a multiphase filter, in order to carry out down-conversion to the RF signal after amplification and to shift to operation, is down-converted to 1MHz; Described band pass filter carries out filtering to the RF signal after frequency conversion; Described analog to digital converter is in order to convert filtered RF signal to digital signal.
As another preferred version of the present invention, the centre frequency of described band pass filter is 1MHz, and bandwidth is ± 600KHz; Described analog to digital converter is the ADC of 9.
As another preferred version of the present invention, described 2.4GHz GFSK transmitter module comprises power amplifier, digital to analog converter; Described digital to analog converter is in order to convert digital signal to analog signal; Described digital to analog converter is connected with power amplifier through described voltage controlled oscillator, and described power amplifier passes through antenna transmission after being amplified by signal; 2.4GHz GFSK transmitter module adopt reactance modulation system, by digital to analog converter, digital signal is converted into analog signal, then GFSK adjustment is carried out to voltage controlled oscillator, finally by power amplifier by signal amplifying emission.
As another preferred version of the present invention, described processing module is integrated with digital state machine, register module, data frame buffer 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 only 20mA, and sensitivity can reach-87dBm, and power consumption is only 15mA, and distance can reach 50m; Present invention achieves RF periphery coupling fully integrated, accomplish the intermediate frequency of 1MHz simultaneously; Under the condition of 1MHz intermediate frequency, chip of the present invention power saving more, the peripheral matching integrated circuit of RF can reduce the pressure of PCB design greatly, decreases cost, adds reliability.
Description of the invention and application are illustrative, not want by scope restriction of the present invention in the above-described embodiments.Distortion and the change of embodiment disclosed are here possible, are known for the replacement of embodiment those those of ordinary skill in the art and the various parts of equivalence.Those skilled in the art are noted that when not departing from spirit of the present invention or substantive characteristics, and the present invention with other forms, structure, layout, ratio, and can realize with other elements, material and parts.
Accompanying drawing explanation
The structural representation of Fig. 1 to be intermediate frequency of the present invention be 2.4G radio transmitting and receiving chip of 1MHz;
Fig. 2 is the structural representation of the peripheral matching integrated circuit of RF of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Embodiment one
The present embodiment provides a kind of intermediate frequency to be the 2.4G radio transmitting and receiving chip of 1MHz, as shown in Figure 1, comprises RF radio-frequency front-end integrated circuit and the peripheral matching integrated circuit of RF.
[RF radio-frequency front-end integrated circuit]
Described 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, radio-frequency (RF) switch (Radio FrequencySwitch, RFSW), as shown in Figure 2.Antennal interface ANT and ANTb is connected with 2.4GHz GFSK receiver module with 2.4GHz GFSK transmitter module respectively by radio-frequency (RF) switch; RF frequency synthesizer is connected with 2.4GHz GFSK receiver module with 2.4GHz GFSK transmitter module respectively; Analogous phase-locking loop module is connected with RF frequency synthesizer with 2.4GHz GFSK transmitter module, 2.4GHz GFSK receiver module respectively.
Described RF frequency synthesizer comprises crystal oscillator (XO), frequency synthesizer (synthesizer), voltage controlled oscillator (VCO), multiphase filter (Poly phase filter, PPF); Described crystal oscillator provides local oscillation signal, and voltage controlled oscillator controls frequency of oscillation by control voltage.RF frequency synthesizer be one can the phase-locked loop of fractional frequency division, the reference clock that crystal oscillator produces can be carried out decimal frequency multiplication, precision can reach 1Hz.Thering is provided stable frequency for launching, providing local oscillation signal for receiving.Described multiphase filter is in order to filter out-band external signal and image signal.
Described 2.4GHz GFSK receiver module comprises the low noise amplifier (LNA), frequency mixer (IQMIXER), band pass filter (BPF), the analog to digital converter (ADC) that are connected successively; The RF signal that antenna receives is input mixer after low noise amplifier is collected and amplified first, frequency mixer carries out down-conversion to the signal after amplification and shifts to operation, after being down-converted to 1MHz, through a centre frequency be 1MHz, bandwidth is ± band pass filter of 600KHz carries out preliminary filtering, convert digital signal to finally by analog to digital converter, be input to numerical portion and process.That Received signal strength and voltage controlled oscillator export by described frequency mixer and oscillator signal through multiphase filter filtering carries out Frequency mixing processing, the signal after mixing enters into band pass filter.Described analog to digital converter is the ADC of 9.
Described 2.4GHz GFSK transmitter module comprises power amplifier (PA), digital to analog converter (DAC); Digital to analog converter converts the digital signal after process to analog signal, and analog signal sends to power amplifier after voltage controlled oscillator modulation, and the signal after power amplifier amplifies passes through antenna transmission.What 2.4GHz GFSK transmitter module adopted is reactance modulation system, by DAC, digital signal is converted into analog signal, then GFSK (Gauss frequency shift keying, Gaussian Frequency Shift Keying) adjustment is carried out to VCO, finally by PA, signal amplifying emission is gone out.
[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 described low-dropout regulator is LDO_VDD (i.e. the 21st interface of chip), and output interface is LDO_OUT (i.e. the 20th interface of chip).Described processing module is integrated with digital state machine (Digital state machine), register module (Register block), data frame buffer 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 described processing module has VDD_IO interface (i.e. the 10th interface of chip), SPI_SS interface (i.e. the 11st interface of chip), CLK interface (i.e. the 14th interface of chip), MISO/12C_DAT interface (i.e. the 17th interface of chip), MOSI/A4 interface (i.e. the 16th interface of chip), 12C_SEL interface (i.e. the 15th interface of chip), fifo interface (i.e. the 8th interface of chip), PKT interface (i.e. the 13rd interface of chip), RST_n interface (i.e. the 18th interface of chip), BRCLK interface (i.e. the 12nd interface of chip), wherein SPI_SS interface (i.e. the 11st interface of chip), CLK interface (i.e. the 14th interface of chip), MISO/12C_DAT interface (i.e. the 17th interface of chip) and MOSI/A4 interface (i.e. the 16th interface of chip) are data base-band interface (digital baseband interface), described processing module is connected with radio-frequency (RF) switch with the 2.4GHz GFSK transmitter module in RF radio-frequency front-end integrated circuit, 2.4GHz GFSK receiver module, RF frequency synthesizer, Analogous phase-locking loop module respectively.Described oscillating buffer is connected with processing module with described RF frequency synthesizer respectively, and the input interface of oscillating buffer is XTALI (i.e. the 24th interface of chip), and output interface is XTALO (i.e. the 23rd interface of chip).
Described 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 interfacing ground.
The present invention is a complete 2.4G radio transmitting and receiving chip, it is integrated with RF radio-frequency front-end, GFSK modulation /demodulation, with transfer of data base band, can constant transmissions 1Mbps data, transmitting power can reach 6dBm, launch power consumption and be only 20mA, sensitivity-87dBm, receive power consumption and be only 15mA, distance can reach 50m.
Compare existing 2.4G circuit, it is fully integrated that chip of the present invention achieves RF periphery coupling, accomplished the intermediate frequency of 1MHz simultaneously.Under the condition of 1MHz intermediate frequency, chip of the present invention power saving more, the peripheral matching integrated circuit of RF can reduce the pressure of PCB layout (PCB design) greatly, decreases cost, adds reliability.
Claims (5)
1. intermediate frequency is a 2.4G radio transmitting and receiving chip of 1MHz, it is characterized in that: comprise RF radio-frequency front-end integrated circuit and the peripheral matching integrated circuit of RF;
Described RF radio-frequency front-end integrated circuit comprises 2.4GHz GFSK transmitter module, 2.4GHz GFSK receiver module, RF frequency synthesizer, Analogous phase-locking loop module and radio-frequency (RF) switch; Antenna is connected with 2.4GHzGFSK receiver module with 2.4GHz GFSK transmitter module by described radio-frequency (RF) switch respectively; RF frequency synthesizer is connected with 2.4GHz GFSK receiver module with 2.4GHz GFSK transmitter module respectively; Analogous phase-locking loop module is connected with RF frequency synthesizer with 2.4GHz GFSK transmitter module, 2.4GHz GFSK receiver module respectively; Described RF frequency synthesizer comprises crystal oscillator, frequency synthesizer, voltage controlled oscillator; Described crystal oscillator is in order to provide local oscillation signal; Crystal oscillator is connected with voltage controlled oscillator by frequency synthesizer, and voltage controlled oscillator controls frequency of oscillation by control voltage; Described RF frequency synthesizer is the phase-locked loop of a fractional frequency division, and carry out decimal frequency multiplication in order to the reference clock produced by crystal oscillator, precision reaches 1Hz, provides stable frequency for launching, and provides local oscillation signal for receiving;
The peripheral matching integrated circuit of RF comprises low-dropout regulator, oscillating buffer and processing module; Described processing module is connected with radio-frequency (RF) switch with the 2.4GHz GFSK transmitter module in RF radio-frequency front-end integrated circuit, 2.4GHz GFSK receiver module, RF frequency synthesizer, Analogous phase-locking loop module respectively; Described oscillating buffer is connected with processing module with described RF frequency synthesizer respectively.
2. intermediate frequency according to claim 1 is the 2.4G radio transmitting and receiving chip of 1MHz, it is characterized in that: described 2.4GHz GFSK receiver module comprises the low noise amplifier, frequency mixer, band pass filter, the analog to digital converter that are connected successively; Described low noise amplifier is in order to collect and to amplify the RF signal received from antenna; Described frequency mixer is connected with described voltage controlled oscillator by a multiphase filter, in order to carry out down-conversion and phase shift operation to the RF signal after amplification, is down-converted to 1MHz; Described band pass filter carries out filtering to the RF signal after frequency conversion; Described analog to digital converter is in order to convert filtered RF signal to digital signal.
3. intermediate frequency according to claim 2 is the 2.4G radio transmitting and receiving chip of 1MHz, it is characterized in that: the centre frequency of described band pass filter is 1MHz, and bandwidth is ± 600KHz; Described analog to digital converter is the ADC of 9.
4. intermediate frequency according to claim 3 is the 2.4G radio transmitting and receiving chip of 1MHz, it is characterized in that: described 2.4GHz GFSK transmitter module comprises power amplifier, digital to analog converter; Described digital to analog converter is in order to convert digital signal to analog signal; Described digital to analog converter is connected with power amplifier through described voltage controlled oscillator, and described power amplifier passes through antenna transmission after being amplified by signal; 2.4GHz GFSK transmitter module adopt reactance modulation system, by digital to analog converter, digital signal is converted into analog signal, then GFSK adjustment is carried out to voltage controlled oscillator, finally by power amplifier by signal amplifying emission.
5. intermediate frequency according to claim 1 is the 2.4G radio transmitting and receiving chip of 1MHz, it is characterized in that: described processing module is integrated with digital state machine, register module, data frame buffer and logic module, forward error correction alarm module, cyclic redundancy check error alarm module.
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Cited By (1)
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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 |
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| 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 |
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| US10715898B2 (en) | 2017-05-11 | 2020-07-14 | Bestechnic (Shanghai) Co., Ltd. | Dual-band wireless headphones |
| 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 |
| 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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Effective date of registration: 20160628 Address after: Building A, No. 18 Jiangsu 214135 Wuxi province cancer Taihu International Science Park Road Zhenze Patentee after: Limited by Share Ltd Jiangsu huge core technology of integrated circuit Address before: Suzhou City, Jiangsu province 215123 Industrial Park Suzhou Xinghu Street No. 328 unit 3-B603 Patentee before: Suzhou Lianke Shengshi Technology Co., Ltd. |
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Correction item: Patentee|Address Correct: Jiangsu Juxin integrated circuit technology Limited by Share Ltd|Building A, No. 18 Jiangsu 214135 Wuxi province cancer Taihu International Science Park Road Zhenze False: Limited by Share Ltd Jiangsu huge core technology of integrated circuit|Building A, No. 18 Jiangsu 214135 Wuxi province cancer Taihu International Science Park Road Zhenze Number: 29 Volume: 32 |
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Effective date of registration: 20181016 Address after: 518101 Guangdong Shenzhen Baoan District Xin'an Street elegant community, Po min road 215, Bao Tong Building 2308 Patentee after: Shenzhen Kuxin integrated circuit technology Co., Ltd. Address before: 214135 A building, cancer 18, Zhen Ze Road, Taihu international science and Technology Park, Wuxi, Jiangsu. Patentee before: Jiangsu Juxin integrated circuit technology Limited by Share Ltd |
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Effective date of registration: 20220316 Address after: 214125 1st floor, building C, cancer, Wuxi Software Park, No. 18, Zhenze Road, New District, Wuxi City, Jiangsu Province Patentee after: NST TECHNOLOGY LIMITED Co.,Ltd. Address before: 518101 Guangdong Shenzhen Baoan District Xin'an Street elegant community, Po min road 215, Bao Tong Building 2308 Patentee before: Shenzhen Kuxin integrated circuit technology Co.,Ltd. |
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