CN103036588B - Ultra-low power consumption transceiver used for short-distance wireless-connection and wireless-node of internet of things - Google Patents
Ultra-low power consumption transceiver used for short-distance wireless-connection and wireless-node of internet of things Download PDFInfo
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- CN103036588B CN103036588B CN201210517565.8A CN201210517565A CN103036588B CN 103036588 B CN103036588 B CN 103036588B CN 201210517565 A CN201210517565 A CN 201210517565A CN 103036588 B CN103036588 B CN 103036588B
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Abstract
The invention relates to an ultra-low power consumption transceiver used for short-distance wireless-connection and wireless-node of internet of things. The ultra-low power consumption transceiver used for short-distance wireless-connection and wireless-node of internet of things comprises a transmitter circuit and a receiver circuit. The transmitter circuit comprises a inductance capacitor (LC) voltage-controlled oscillator (VCO), a prescaler for producing carrier frequency signals, a signal modulator modulating square wave base band signals onto the carrier frequency signals to form emission signals, and a power amplifier for amplifying the emission signals. The receiver circuit comprises a low noise amplifier (LNA), a radio frequency automatic bias control amplifier for amplifying the received signals and demodulating the amplified signals, and an analog-digital converter for converting the demodulated analog signals into digital signals. The transmission power consumption of the wireless-node of the internet of things is greatly reduced.
Description
Technical field
The present invention relates to the extremely low power dissipation technical field of radio node, particularly relate to a kind of super low-power consumption transceiver for the interconnected radio node of Internet of Things short-distance wireless.
Background technology
Concept birth since Internet of Things (Internet of Things), has started research tide in educational circles and industrial quarters.Radio node is basic physical composition part and the networking element of the interconnected and communication of Internet of Things, short-distance wireless, wireless communication technology application and development along with city, radio node performance has been proposed to new requirement, may be summarized to be following 3 points: 1) low cost; 2) small size; 3) low-power consumption, wherein low-power consumption is the harshest requirement.Although have made some progress aspect Low-power Technology, also can not meet the requirement of low-power consumption far away.
Data shows that western countries comprise that the European countries such as the U.S. and Germany, France, Belgium, Sweden and Asian countries Korea S, Japan have dropped into a large amount of research reducing on wireless system power problems.The wireless integrated network sensor laboratory of University of California in Los Angeles (UCLA), mainly researches and develops the wireless transmission networking of low-power consumption, and corresponding circuit.The Anantha P.Chandrakasan of the Massachusetts Institute of Technology (MIT) once in 2007 at one piece of Energy Efficient ASK transceiver of solid-state circuit magazine (JSSC), this transceiver can reduce power consumption and effectively utilize energy.It is more that University of California Berkeley is engaged in the research of this respect, and Jan Rabaey has been set up PicoRadio Project in University of California Berkeley, for the research of ultra-low power consumption wireless node in high-density wireless network.Also have some large-scale companies to participate in the Internet of things node circuit of releasing simultaneously, attempt adopts low power dissipation design and using it as market orientation with attractable point, as the CC1000 of the ANT internet of things networking chip of Noordic Semiconductor (Sweden) and TI and CC1100 and CC2430 chip series.The research that domestic wireless system super low-power consumption technology is relevant is at the early-stage, also lags behind out and away external.At present, there is no actual available technical report out.
Although both at home and abroad for Internet of Things, short-distance wireless is interconnected and the super low-power consumption technology of communication has relevant research report, most of stage in researching and developing still, exist some problems and can not introduce to the market.On the one hand owing to using production cost higher in order to meet the requirement of circuit working, such as most of transceiver adopts some high performance filters as bulk acoustic wave BAW, surface wave SAW and membrane well acoustic resonator (FBAR).Though these can improve the performance of transceiver, volume ratio is large, cost is higher.On the other hand, because the frequency allocation criterion between country is different, research is applicable to the radio node transceiver circuit of Chinese Internet of Things frequency range, still far lags behind at present external.Such as, the operating frequency 2.4GHz of external most of transmission circuit, 915MHz, and domestic relevant operating frequency is 780MHz/433MHz, and there is no corresponding high performance filter product yet.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of super low-power consumption transceiver for the interconnected radio node of Internet of Things short-distance wireless, makes the power-dissipation-reduced of Internet of Things radio node.
The technical solution adopted for the present invention to solve the technical problems is: a kind of super low-power consumption transceiver for the interconnected radio node of Internet of Things short-distance wireless is provided, comprise transmitter circuitry and receiver circuit, described transmitter circuitry comprises LC voltage controlled oscillator, pre-divider, Manchester's code and modulator, the power amplifier of cascade; Described LC voltage controlled oscillator and pre-divider are for generation of CF signal; Described manchester encoder and modulator are encoded, are modulated to formation in CF signal by baseband signal and transmit; Described power amplifier is for amplifying emission signal; Described receiver circuit comprises low noise amplifier, rf agc amplifier, differential ference spiral device and manchester decoder device and the analog to digital converter of cascade; Described low noise amplifier and rf agc amplifier are for amplifying the signal of receiving; Described differential ference spiral device and manchester decoder device are used for amplifying signal demodulation code; Described analog to digital converter is converted to digital signal by the analog signal of demodulation code.
Between described Manchester's code and modulator and analog to digital converter, be also provided with amplitude limiter; Described amplitude limiter is for limiting the signal amplitude of demodulator output.
Described LC voltage controlled oscillator adopts LC resonant tank to realize.
Described power amplifier is the power amplifier that includes a plurality of gears, and adopts adjusting L-type match circuit.
Described low noise amplifier adopts L-type input matching circuit.
Described rf agc amplifier is multi-level radio-frequency automatic gain amplifier.
Described analog to digital converter is 1bit analog to digital converter.
Described ultra-low power consumption wireless transceiver is used for Internet of Things, short-distance wireless is interconnected and communication.
Beneficial effect
Owing to having adopted above-mentioned technical scheme, the present invention compared with prior art, there is following advantage and good effect: the present invention adopts the transceiver architecture of designs simplification, energy-efficient, avoid high power consumption module such as the use of frequency mixer and local oscillator, can further reduce power consumption.The present invention has adopted the L-type low noise amplifier without additional filter, can reduce greatly the power consumption of receiver circuit.The present invention adopts the automatic gain amplifier of many grades of amplifications, under suitable design conditions, and can reach-80dBm of the receiving sensitivity of transceiver circuit.
Accompanying drawing explanation
Fig. 1 is transmitter circuitry block diagram in the present invention;
Fig. 2 is receiver circuit block diagram in the present invention;
Fig. 3 is PCB circuit catenation principle figure of the present invention.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Radio-frequency transceiver system circuit of the present invention, receives and dispatches with the signal of 780MHz carrier frequency cheaply.This system comprises match circuit, test point and the control pin of 780MHz transceiver chip and chip periphery.Chip die size 1mm*1mm, mainly comprises transmitter circuitry (TX) and receiver circuit (RX), and can carry out wireless receiving and dispatching signal by antenna.Wherein, transmitter circuitry as shown in Figure 1, comprising: LC voltage controlled oscillator, pre-divider, manchester encoder and the modulator of cascade, with power amplifier and the transmitting antenna of three gears; Receiver circuit as shown in Figure 2, comprising: the reception antenna of cascade, high low mode low noise amplifier, level Four rf agc amplifier, differential ference spiral device and manchester decoder device and 1bit analog to digital converter.The present invention does not use high performance filter, is transceiver low-cost, low-power consumption, can transmit and receive the signal of 780MHz carrier frequency, is applicable to Internet of Things, short-distance wireless is interconnected and communication.
Described LC voltage controlled oscillator and pre-divider are for generation of CF signal; Described manchester encoder and modulator are modulated to baseband signal in CF signal and form and transmit; Described power amplifier is for amplifying emission signal; Described transmitting antenna is launched power amplifier amplifying signal; Described reception antenna is for receiving the signal of transmission antennas transmit; Described low noise amplifier and rf agc amplifier are for amplifying the signal of receiving; Described differential ference spiral device and manchester decoder device are used for amplifying signal demodulation code; Described analog to digital converter is converted to digital signal by the analog signal of demodulation code.
Between described differential ference spiral device and manchester decoder device and analog to digital converter, be also provided with amplitude limiter; Described amplitude limiter, for limiting the signal amplitude of differential ference spiral device and the output of manchester decoder device, is avoided the interference of noise.
Wherein, voltage controlled oscillator adopts LC resonant tank to realize, and without phase-locked loop, can reduce the power consumption of described transceiver, produces the carrier frequency that described transceiver needs simultaneously.Power amplifier is the power amplifier that includes three gears, thereby can launch according to power amplifier gear the signal of different power, so that detect the work of radiating circuit.Simultaneously described power amplifier adopts and regulates L-type match circuit, at utmost amplifying signal.Manchester encoder and modulator can be modulated to baseband signal the CF signal of transceiver, make the signal of transmitter circuitry transmitting 780MHz.Described low noise amplifier adopts simple L-type input matching circuit, does not use high performance filter as bulk acoustic wave BAW, surface wave SAW and membrane well acoustic resonator (FBAR), and the sensitivity that can improve described transceiver.Described rf agc amplifier is level Four rf agc amplifier, can realize many grades and control amplification, can make transceiver receive different input signals.Described analog to digital converter adopts 1 bit moduli transducer, because the baseband signal of described transceiver is fairly simple signal, only needs 1 bit just can processing signals.
As shown in Figure 3, adopt PCB to test, wherein PCB test board is used the LDO chip of 4 MP2000-ADJ models, these 4 LDO chips are given respectively RX_VDD, TX_VCO_VDD, PA_VDD and MAX3013_VDD12 provide the voltage of 1.2v, and its whole pcb board adopts the unified power supply of 3.3v, and transmission circuit operating voltage is 1.2V, so need to carry out level conversion.Adopt the input of the LDO chip of MP2000-ADJ model to be connected to 3.3v voltage, the variable resistor by 20K carries out dividing potential drop, and making output voltage is 1.2V, then at the Jump by PCB, is connected to the corresponding vdd terminal mouth of chip, the work of control chip.
When independent control TX circuit, 1 end and 2 ends of U10 couple together, by U1 wire jumper is selected to earth level or high level flexibly; While controlling TX by external circuit, 2 ends and 3 ends of U10 couple together, and 1 end and 2 ends of U6 couple together.U19 and U20 control transmitter and connect TX_VCO_VDD, by the outer 20K variable resistor R1 of sheet and resistance R 2 dividing potential drops, the voltage Tx_Vtrl that adjusts voltage controlled oscillator can effectively control the frequency that LC voltage controlled oscillator produces, and then through pre-two-divider, obtains needed carrier wave.The control of TX_DATA_IN port, is comprised of U27 and U30.When the TX_DATA_IN of IOT chip port ground connection, 2 ends and 3 ends of U27 couple together, and 1 end of U30 and 2 ends have connected and fetch; When the TX_DATA_IN of IOT chip port meets VDD, 2 ends and 3 ends of U27 couple together, and 2 ends of U30 and 3 ends have connected and fetch; When the base band data outside the contact pin of the TX_DATA_IN of IOT chip port is inputted, 1 end and 2 ends of U27 couple together.PA_GM<0> and PA_GM<1>(U17 and U18) can control transmitter the mode of operation of PA.When 1 end of U17 is connected with 2 ends while being connected with 3 ends with 2 ends of U18, PA is operated under low-power consumption mode power output as-1dbm; When 2 ends of U17 are connected with 3 ends while being connected with 2 ends with 1 end of U18, it is 4dbm that PA is operated in power output under medium power consumption mode; When 1 end of U17 is connected with 2 ends while being connected with 2 ends with 1 end of U18, it is 9dbm that PA is operated in power output under high power consumption mode.The match circuit that simultaneously L-type L3, C19 are PA, when the power output of PA, can regulate L-type match circuit, thereby improve the delivery efficiency of PA when low-grade in different.
When independent control RX circuit, 1 end and 2 ends of U12 couple together, by U3 wire jumper is selected to earth level or high level flexibly; While controlling RX by external circuit, 2 ends and 3 ends of U12 couple together, and 1 end and 2 ends of U8 couple together.U33 controls the voltage supply of whole receiver, when RX normally works, should make its connection.L4 and C22 form the L-type matching network of RX_LNA_IN, and debugging L-type matching network, makes near be less than 780M-12db of S11.The parallel resonance load that L5, C29 outside the contact pin of RX_LNA_OUT port forms, has obtained maximum gain.Rf agc amplifier (RF PGA) has four different gears, and each gear highest-gain 10db, by these four gears of U50, U51, U52, U53 and U54 control RF PGA.Then adopt differential ference spiral device to carry out both-end output.Through 1bit analog-to-digital conversion, export needed restituted signal.The overall noise formula of receiver wherein:
F wherein
ampand A
ampnoise factor and the gain of RF radio-frequency front-end, k
eDand N
o, EDgain and the output noise of differential ference spiral device, N
self, RFbe radio-frequency front-end from phase mixing noise, N
rscit is source class transistor noise.The low-frequency noise of radio-frequency front-end can be ignored because in rf agc amplifier and envelope noise AC coupled.The sensitivity formula of receiver:
P
in,min＝-174dbm/Hz+NF
tot+10logBW
det+SNR
out,min
BW wherein
detit is differential ference spiral device-3db bandwidth.Can reach-82dbm of the sensitivity of receiver is 0.001 at BER.Finally, by test point U40, check the output of receiver.
Adopt two pcb boards, one as transmitter, and one as receiver, and under the gain mode of different output power of transmitters and different receiver, it is reception and transmission range and the node communication distance under 0.001 condition that debugging meets BER.Step: (1.) first debugging control position and voltage supply, to guarantee that TX and RX normally work; (2.) TX and RX separately and instrument carry out wireless receiving and dispatching; (3.) TX and RX carry out wireless receiving and dispatching signal.
A PCB receiver circuit carries out separately wireless transmission signal:
1. open 1 end and 2 ends that TX circuit: Tx_PD meets 0, U10 and couple together, 2 ends and 3 ends of U1 couple together;
1 end and 2 ends that PA_PD meets 0, U11 couple together, and 2 ends and 3 ends of U2 couple together;
2. close 1 end and 2 ends that Rx circuit: Rx_PD meets 1, U12 and couple together, 1 end and 2 ends of U3 couple together;
Close Wake_up, 1 end and 2 ends of U13 couple together, and 1 end and 2 ends of U4 couple together;
3. opening VCO:U19 connects;
4. connect Vctrl:U20 and connect, adjust variable resistor and make Vctrl=420mV, export corresponding 780MHz carrier wave;
5. connecting PA_VDD:U29 connects;
6. Tx_Data_In incoming control signal, U30, U27; Wherein 0 represents no signal, and 1 represents sinusoidal 780MHz radiofrequency signal; Access the square-wave signal of " 0101 " sequence, be output as the ASK signal of 780MHz;
7. power output adjustment: U17, U18; Wherein U17 is PA GM<0>, and U18 is PA GM<1>;
The DC working point that provides the bias voltage of 1.2V to guarantee transmitter by DC power supply is normal, guarantees that Bandgap is 766mV simultaneously.Because be that 766mv represents that transmitter can work normally when BG_EXT_CTRL and IB_CTRL are all made as 0, Bandgap.Control Tx_Vtrl both end voltage, by regulating variable resistor R1 and R2 to make to launch 780MHz carrier signal.Then by AWG (Arbitrary Waveform Generator), produce amplitude 1.2V, the square-wave signal of " 0101 " sequence of 500K.The Jump that 1 end and 2 ends by U27 couple together, is linked into chip by base band data.U42 places transmitting antenna, and oscilloscope is placed reception antenna.Transmitter can carry out wireless transmission signal, and checks output ASK signal by oscilloscope.U17 controls the different gear of PA with U18, can observe the variation of amplitude output signal.
Another piece PCB transmitter circuitry carries out separately wireless receiving signal:
1. open 1 end and 2 ends that Rx circuit: Rx_PD meets 1, U12 and couple together, 2 ends and 3 ends of U3 couple together;
Close Wake_up, 1 end and 2 ends of U13 couple together, and 1 end and 2 ends of U4 couple together;
2. close 1 end and 2 ends that TX circuit: Tx_PD meets 0, U10 and couple together, 1 end and 2 ends of U1 couple together;
1 end and 2 ends that PA_PD meets 1, U11 couple together, and 1 end and 2 ends of U2 couple together;
3. closing VCO:U19 disconnects;
4. Vctrl does not connect U20 disconnection, and PA deenergization U29 disconnects simultaneously.
5. U39 connects: give Rx and Ibias power supply;
6. U40 connects, the convenient Rx output signal of surveying.
By DC power supply, provide the bias voltage of 1.2V to guarantee that the DC working point of receiver is normal.With signal generator, produce amplitude 780MHz, data transfer rate is 500Kbps, the ASK signal of " 0101 " sequence, and connect transmitting antenna.U43 places reception antenna simultaneously.Receiver can carry out wireless transmission signal, and by oscilloscope, connects U40 and check output.The transmitting power that conditioning signal reflector is different, different transmission data rates and U50-U54 control the different gear of RF PGA, can observe the variation of output signal.And can judge the sensitivity of receiver and best operating state.
Wireless receiving and dispatching according to above-mentioned transmitter and receiver arranges, and first guarantees that transmitter and receiver can carry out wireless receiving and dispatching signal separately.Then, transmitter is sent by U42 by antenna, and receiver is carried out the signal of wireless receiving transmitter by U43.The signal of exporting by oscilloscope measurement U40 again.Finally, the sensitivity that adjusting that can be suitable as required receives, power consumption and the baseband signal of consumption.
Claims (6)
1. the super low-power consumption transceiver for the interconnected radio node of Internet of Things short-distance wireless, comprise transmitter circuitry and receiver circuit, it is characterized in that, described transmitter circuitry comprises LC voltage controlled oscillator, pre-divider, Manchester's code and modulator, the power amplifier of cascade; Described LC voltage controlled oscillator and pre-divider are for generation of CF signal; Described manchester encoder and modulator are encoded, are modulated to formation in CF signal by baseband signal and transmit; Described power amplifier is for amplifying emission signal; Described receiver circuit comprises low noise amplifier, rf agc amplifier, differential ference spiral device and manchester decoder device and the analog to digital converter of cascade; Described low noise amplifier and rf agc amplifier are for amplifying the signal of receiving; Described differential ference spiral device and manchester decoder device are used for amplifying signal demodulation code; Described analog to digital converter is converted to digital signal by the analog signal of demodulation code; Described LC voltage controlled oscillator adopts LC resonant tank to realize; Described low noise amplifier adopts L-type input matching circuit.
2. the super low-power consumption transceiver for the interconnected radio node of Internet of Things short-distance wireless according to claim 1, is characterized in that, between described differential ference spiral device and manchester decoder device and analog to digital converter, is also provided with amplitude limiter; Described amplitude limiter is for limiting the signal amplitude of demodulator output.
3. the super low-power consumption transceiver for the interconnected radio node of Internet of Things short-distance wireless according to claim 1, is characterized in that, described power amplifier is the power amplifier that includes a plurality of gears, adopts and regulates L-type match circuit.
4. the super low-power consumption transceiver for the interconnected radio node of Internet of Things short-distance wireless according to claim 1, is characterized in that, described rf agc amplifier is multi-level radio-frequency automatic gain amplifier.
5. the super low-power consumption transceiver for the interconnected radio node of Internet of Things short-distance wireless according to claim 1, is characterized in that, described analog to digital converter is 1bit analog to digital converter.
6. the super low-power consumption transceiver for the interconnected radio node of Internet of Things short-distance wireless according to claim 1, is characterized in that, described super low-power consumption transceiver is used for Internet of Things, short-distance wireless is interconnected and communication.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9635147B2 (en) | 2014-07-09 | 2017-04-25 | The Regents Of The University Of Michigan | Protocol for an electronic device to receive a data packet from an external device |
| CN106541405A (en) * | 2016-10-31 | 2017-03-29 | 河池学院 | A kind of IOT network interconnections robot |
| US10714983B2 (en) * | 2017-12-21 | 2020-07-14 | Apple Inc. | Near-field microwave wireless power system |
| CN110162500A (en) * | 2019-06-03 | 2019-08-23 | 济南浪潮高新科技投资发展有限公司 | A kind of Waveform generation method and system based on Internet of Things mode |
| CN111969973B (en) * | 2020-08-25 | 2023-09-15 | 中国科学院上海高等研究院 | Low-power consumption internet of things transceiver system with wake-up circuit |
| CN114866100B (en) * | 2022-04-28 | 2024-04-12 | 上海航天电子通讯设备研究所 | High-speed automatic gain control system based on phase coding |
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| CN1411651A (en) * | 1999-11-12 | 2003-04-16 | Gct半导体公司 | Single chip CMOS transmitter/receiver and method of using same |
| CN201039094Y (en) * | 2007-05-21 | 2008-03-19 | 杭州中科微电子有限公司 | A high-gain RF low-noise amplifier |
| CN101465618A (en) * | 2007-12-19 | 2009-06-24 | 中国科学院微电子研究所 | Ultra-wideband low-noise amplifier with double input routes |
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| CN1411651A (en) * | 1999-11-12 | 2003-04-16 | Gct半导体公司 | Single chip CMOS transmitter/receiver and method of using same |
| CN201039094Y (en) * | 2007-05-21 | 2008-03-19 | 杭州中科微电子有限公司 | A high-gain RF low-noise amplifier |
| CN101465618A (en) * | 2007-12-19 | 2009-06-24 | 中国科学院微电子研究所 | Ultra-wideband low-noise amplifier with double input routes |
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