CN102118179A - RF transceiver circuit system - Google Patents
RF transceiver circuit system Download PDFInfo
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- CN102118179A CN102118179A CN2011101015814A CN201110101581A CN102118179A CN 102118179 A CN102118179 A CN 102118179A CN 2011101015814 A CN2011101015814 A CN 2011101015814A CN 201110101581 A CN201110101581 A CN 201110101581A CN 102118179 A CN102118179 A CN 102118179A
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Abstract
The invention discloses an RF (radio frequency) transceiver circuit system. The system comprises an on-chip circuit and a matching circuit connected with the on-chip circuit; the matching circuit is in circuit connection with the on-chip circuit through a first port, a second port and a third port; the on-chip circuit comprises a transmitter circuit and a receiver circuit in circuit connection with the transmitter circuit; the first port is in circuit connection with a voltage stabilizer of a receiver and a voltage stabilizer of a transmitter respectively; the second port is in circuit connection the voltage stabilizer of the transmitter and a first-stage amplifier respectively; and the third port is in circuit connection with a second-stage amplifier and a low-noise amplifier. According to the invention, the third port just needs to be arranged on a radio frequency signal channel, and only one inductor is adopted in the matching circuit, so that off-chip matching circuit is simplified and the cost of off-chip components BOM (Bill of Material) is reduced.
Description
Technical field
The present invention relates to a kind of radio circuit technology of field of wireless communication, be specifically related to a kind of radio-frequency system circuit.
Background technology
At present, short distance, low-power consumption and cheaply 2.4GHz rf chip circuit be widely used in wireless mouse, Wireless Keyboard, highway wireless charge ETC system, wireless safety check and fields such as control, green energy conservation and the mobile payment of 2.4GHz mobile phone.In all these consumer application, because demand is huge, so the whole terminal controller is to need low-down one-tenth to win the intense market competition advantage originally.Share radio circuit, its price is to calculate with the 20-30 cent.So use at these, reducing whole radio-frequency system has special meaning.Cost is low more, and competitive advantage is just strong more.On market, as the Nordic company in Europe, all there has been very ripe 2.4GHz rf chip in the AMICCOM company in Taiwan and the Micrel company of the U.S. etc. at present.These product majorities adopt cheaply, and CMOS technology realizes.
As shown in Figure 1, in the prior art low-power consumption and cheaply the 2.4GHz radio-frequency (RF) transmit-receive circuit all be to adopt traditional low intermediate frequency receiver system architecture.2.4GHz radiofrequency signal is received in the signalling channel of radio frequency by antenna (Antenna).At first (this match circuit is by C by the outer match circuit of circuit for the 2.4GHz radiofrequency signal that receives
1, C
2, L
1, L
2And L
3Form) again by pin P
3And P
4The low noise amplifier (LNA) that is connected to the front end in the circuit amplifies.Signal after the amplification is connected to low-converter (Mixer) and makes further signal processing to intermediate-frequency circuit through coupling capacitance.In general, the such low cost and radio-frequency front-end receiver (Receiver) circuit of low-power consumption are to be powered by the low pressure difference linear voltage regulator (LDO) in the sheet.
Aspect transmitter (Transmitter), from the GFSK radiofrequency signal that voltage controlled oscillator (VCO does not have demonstration among the figure) is directly modulated, the first order (1 of process power amplifier driving amplifier (PA Driver)
StStage) and the second level (2
NdStage) after the amplification, (this match circuit is by C to be passed to the outer radio frequency matching circuit of sheet
1, C
2, L
1, L
2And L
3Form).Through behind the radio frequency matching circuit, transmitting is transmitted in the air by antenna (Antenna).Along with the competition in market is more and more fierce, the cost requirement of chip and chip solution is more and more higher.So port P of circuit
3And P
4It is simultaneously multiplexing to be received machine (Receiver) and transmitter (Transmitter).Equally, the transmitter of radio-frequency front-end (Transmitter) circuit is to be powered by the low pressure difference linear voltage regulator (LDO) in the sheet.This pressurizer (LDO) has the outer electric capacity C of sheet
3And C
4Filter the signal of low frequency and high frequency.Pressurizer and power supply (LDO) are by the outer cell voltage V of sheet
BatProvide.
The diverter switch of receiver (Receiver) and transmitter (Transmitter) realizes by closing or open receiver (Receiver).Such as, receiver (Receiver) is when opening, and transmitter (Transmitter) has just cut out.After transmitter (Transmitter) cuts out, to the second level (2 of transmitter (Transmitter)
NdStage) amplifier is seen, impedance is a high resistant.Receiver (Receiver) is with regard to operate as normal like this.Otherwise when receiver (Receiver) when closing, transmitter (Transmitter) is just open-minded.After receiver (Receiver) cuts out, see that to the low noise amplifier (LNA) of receiver (Receiver) impedance is a high resistant.Transmitter (Transmitter) is with regard to operate as normal like this.
What will reaffirm here is that the outer auxiliary circuit of circuit is indivisible part of entire circuit system schema.In the cost competition of fierceness, the outer device, particularly inductance of circuit accounted for the outer important part of device (BOM) scheme of integrated piece.Its shortcoming is, when using traditional circuit, match circuit must be set, the outer device of the sheet of match circuit occupies certain circuit space of a whole page, restricted the further downsizing of Circuits System, the outer device of the sheet of match circuit improves the cost of traditional circuit system simultaneously, reduces the market competitiveness of Circuits System.
Summary of the invention
The invention provides a kind of radio-frequency system circuit, reduce the match circuit of circuit system outside, further reduce the size of circuit system, reduce the cost of system.
For achieving the above object, the invention provides a kind of radio-frequency system circuit, this system comprises on-chip circuit, and the match circuit that is connected with this on-chip circuit circuit; Be characterized in that this match circuit is connected by first port, second port and the 3rd port circuit with on-chip circuit;
Above-mentioned on-chip circuit comprises:
Transmitter circuitry, this transmitter circuitry comprises first order amplifier, and the second level amplifier and the transmitter pressurizer that are connected with this first order amplifier circuit respectively; And,
The receiver circuit that is connected with above-mentioned transmitter circuitry circuit; This receiver circuit comprises low noise amplifier, and blender that is connected with this amplifier circuit in low noise respectively and receiver pressurizer;
The first above-mentioned port is connected with the transmitter voltage regulator circuit with above-mentioned receiver pressurizer respectively;
The second above-mentioned port is connected with first order amplifier circuit with above-mentioned transmitter pressurizer respectively;
The 3rd above-mentioned port is connected with amplifier circuit in low noise with above-mentioned second level amplifier respectively.
Above-mentioned match circuit comprises:
The antenna that is connected with above-mentioned the 3rd port circuit; Go back circuit between the 3rd port and the antenna and be connected with second electric capacity; Circuit is connected with first electric capacity between this antenna and second electric capacity, this first capacity earth;
Be connected in the 3rd electric capacity and the 4th electric capacity on the second above-mentioned port in parallel, the other end ground connection of the 3rd electric capacity and the 4th electric capacity;
Circuit is connected second above-mentioned port and the inductance between the 3rd port; And,
The battery supply that is connected with above-mentioned first port circuit.
Also be provided with between the second above-mentioned port and above-mentioned transmitter pressurizer and the first order amplifier and receive and emission switch.
When receiver circuit was opened, transmitter circuitry promptly cut out.After transmitter circuitry cut out, amplifier was seen to the second level of transmitter circuitry, and impedance is a high resistant.At this moment, be connected to the cause of this root line of second port because of reception and emission switch, quilt is ground connection by force.Radiofrequency signal after through first electric capacity and second electric capacity, sees it is ac current source toward inductance by antenna.Radiofrequency signal enters low noise amplifier.
When receiver circuit cut out, transmitter circuitry was just open-minded.After receiver circuit cuts out, see that impedance is a high resistant to the low noise amplifier of receiver circuit.Transmitter circuitry is with regard to operate as normal like this.After the radiofrequency signal of emission is amplified by second level amplifier driving amplifier, be passed to the outer match circuit of sheet by the 3rd port, at last by antenna transmission in air.The inductance of match circuit function at this moment is exactly a choke inductance, can be used as the load of second level amplifier driving amplifier.Reception and emission switch disconnect, and the transmitter pressurizer is confessed normal voltage and given whole transmitter circuitry usefulness, and direct voltage is also powered to second level amplifier driving amplifier simultaneously.
The radio-frequency (RF) transmit-receive circuit of a kind of radio-frequency system circuit of the present invention and prior art is compared, its advantage is, the present invention is on radio frequency signal channels, only need one the 3rd port, being implemented in only needs to adopt an inductance in the match circuit, the outer match circuit of sheet is simplified, lowered the cost of the outer components and parts BOM of sheet;
The second level of the present invention amplifier has adopted single-ended common-source amplifier, its load is the inductance of match circuit, the outer inductance of sheet can provide higher power gain, and the inductance of match circuit can provide a low noise current source for low noise amplifier again when receiving;
Low noise amplifier of the present invention is a cathode-input amplifier, and the output reverse isolation of low noise amplifier can further be strengthened.With respect to traditional fully differential common source low noise amplifier structure, its noise factor and the linearity can be not poor, or performance is better.But because adopt single-ended low noise amplifier, channeling port has just reduced one, has reduced outer device (BOM) cost of sheet.
Description of drawings
Fig. 1 is the circuit theory diagrams of prior art 2.4GHz radio-frequency (RF) transmit-receive circuit;
Fig. 2 is the circuit theory diagrams of a kind of radio-frequency system circuit of the present invention.
Embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention.
As shown in Figure 2, the invention discloses a kind of radio-frequency system circuit, below be specifically described as embodiment with a kind of low-cost 2.4GHz radio-frequency system circuit, this system comprises the on-chip circuit 2 that is arranged in the main circuit, and be arranged on the outer match circuit 1 of main circuit, be connected with the 3rd port P3 circuit by three ports, the first port P1, the second port P2 between this match circuit 1 and the on-chip circuit 2.
Match circuit 1 comprises antenna 11, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, inductance L 1 and battery supply V
BatAntenna 11 is connected with the 3rd port P3 circuit, also is connected in series with second capacitor C 2 between antenna 11 and the 3rd port P3, goes back circuit and be connected with first capacitor C 1 between the antenna 11 and second capacitor C 2, this first capacitor C, 1 ground connection.The 3rd capacitor C 3 and the 4th capacitor C 4 are connected in parallel, an end ground connection of the 3rd capacitor C 3 and the 4th capacitor C 4, and other end circuit connects the second port P2.Inductance L 1 circuit is connected between the second port P2 and the 3rd port P3.Battery supply V
BatCircuit connects the first port P1.
On-chip circuit 2 comprises transmitter circuitry 21(Transmitter), and with this transmitter circuitry 21(Transmitter) the receiver circuit 22(Receiver that is connected of circuit).
Transmitter circuitry 21 comprises first order amplifier 211, and the second level amplifier 212 and the transmitter pressurizer 213 that are connected with these first order amplifier 211 circuit respectively, this first order amplifier 211 and second level amplifier 212 are formed power amplifier driving amplifier (PA Driver).The inlet circuit of this first order amplifier 211 connects external voltage controlled oscillator (VCO does not draw).First order amplifier 211 has adopted the amplifier architecture of common source fully differential, and it comprises three NMOS pipes 1, NMOS pipe 2 and NMOS 3, differential capacitances of pipe and a differential inductance.Two NMOS pipe 1 and NMOS pipe 2 are symmetrical arranged, and are connected in parallel to a differential inductance and differential capacitance between two drain electrode.The centre cap of differential inductance (Center Tap) is received the power supply V of transmitter circuitry 21
DD_PAOn.The grid of these two NMOS pipes 1 and NMOS pipe 2 circuit respectively is connected voltage controlled oscillator VCO, and these two NMOS pipes 1 are connected the drain electrode of NMOS pipe 3, the source ground of this NMOS pipe 3 with the source circuit of NMOS pipe 2.One terminal circuit of inductance connects second level amplifier 212, and this inductance is also distinguished circuit and connected the transmitter pressurizer 213 and the second port P2.
Transmitter circuitry 21 also comprises reception and the emission switch 214 that is connected with the second port P2 circuit, and this receives and emission switch 214 adopts NMOS pipe 7, and its drain circuit connects the second port P2, source ground.
Transmitter circuitry 21 receives the GFSK radiofrequency signal that voltage controlled oscillator VCO is directly modulated, after this signal passes through the first order amplifier 211 and 212 amplifications of second level amplifier of power amplifier driving amplifier (PA Driver) successively, be passed to the outer radio frequency matching circuit 1 of sheet by the 3rd port P3, signal transfers to antenna 11, is transmitted to the external world by antenna 11.
Two circuit that change list of transmitter circuitry 21 of the present invention are to make in the load of first order amplifier 211.It is superimposed on the grid of second level amplifier 212 that the inductance capacitance resonant cavity of first order amplifier 211 is designed to the difference radio frequency transmissions.At this moment single-ended radiofrequency signal is handled and is just become simple.And the output of second level amplifier 212 signals only needs a channeling port, and the 3rd port P3 gets final product.
Receiver circuit 22 comprises low noise amplifier 221, and the blender 222 and the receiver pressurizer 223 that are connected with these low noise amplifier 221 circuit respectively.Low noise amplifier 221 comprises two NMOS pipe 5 and the NMOS pipe 6 that is connected in series, the source circuit of NMOS pipe 5 connects the drain electrode of NMOS pipe 6, the drain electrode of NMOS pipe 5 is connected in parallel to electric capacity and inductance, the other end circuit of this electric capacity connects the output of blender 222, blender 222 two inlet circuits connect the IF channels, the other end circuit of inductance connects the output of receiver pressurizer 223.The source electrode of NMOS pipe 6 is connected in series with an inductance and electric capacity, the other end ground connection of this electric capacity successively.The inlet circuit of receiver pressurizer 223 connects the first port P1.Wherein, low noise amplifier 221 is cathode-input amplifiers, and crystal NMOS pipe 5 is used for Signal Spacing and uses, and the output reverse isolation of low noise amplifier can further be strengthened.
For receive path, single-ended low noise amplifier 221, the amplifier architecture that adopts grid altogether with respect to traditional fully differential common source low noise amplifier structure, its noise factor and the linearity can be not poor, or performance is better.But because adopt single-ended low noise amplifier 221, channeling port has just reduced one, has reduced outer device (BOM) cost of sheet.
Below in conjunction with Fig. 2 the requirement that match circuit 1 is selected each components and parts for use in the low-cost 2.4GHz radio-frequency system circuit is described.Transmitter pressurizer 213(LDO) V that confesses
DD_PAVoltage, it needs the 3rd capacitor C 3 and the 4th capacitor C 4 under the match circuit 1.The 3rd capacitor C 3 can be chosen as a value, and this electric capacity mainly is to be used for several hertz of noises to tens megahertzes of filtering, notes transmitter pressurizer 213(LDO) stability.The 4th capacitor C 4 can be selected a value, and this 4th capacitor C 4 mainly is to be used for the radio frequency or the noise of several Gigahertzs of filtering, at transmitter pressurizer 213(LDO) noise of measurement of output end 2.4GHz radio frequency is that minimum device selects flow process as follows.
Step 1 is closed transmitter circuitry 21 earlier, and receiver circuit 22 is opened and debugged match circuit 1.The terminal circuit that first capacitor C 1 connects antenna 11 connects a signal network instrument (Network Analyzer), on the impedance diagram of the Smith chart (Smith Chart) of 50-Ohm, constantly regulate first capacitor C 1, second capacitor C 2 and inductance L 1 are to such an extent as to the port of antenna 11 can match near 50-Ohm.In general in low-power consumption with cheaply on the 2.4GHz radio frequency transceiver circuit design, input match parameter S
11Can be transferred in the operating frequency of 2.4GHz the inside-10dB gets final product.
Step 2 is closed receiver circuit 22, and opens transmitter circuitry 21 simultaneously.Circuit connects signal network instrument (Network Analyzer) on the antenna 11.Transmitter circuitry 21 is adjusted] the output transmission characteristic.At this moment, though receiver circuit 22 has been closed, and the 3rd port P3 sees and presents high resistant under radio frequency, stray inductance and electric capacity are arranged still to low noise amplifier 221.Need to adjust the electric current and the inductance L 1 of transmitter circuitry 21, be implemented under the electric current of same transmitter circuitry 21, the power of radio frequency output is maximum, and the transmission characteristic of output is best.
Step 3 is got back to step 1, continues the match circuit 1 of fine tuning receiver circuit 22, and reaching receipts at last and sending out all is best coupling.
Receiver circuit 22(Receiver is described under the low-cost 2.4GHz radio-frequency system of the present invention circuit below in conjunction with Fig. 2) and transmitter circuitry 21(Transmitter) the changing method flow process.Receive and emission switch 214(TR SW) realize by closing or open receiver circuit 22.Such as, when receiver circuit 22 is opened, transmitter circuitry 21(Transmitter) promptly close.Transmitter circuitry 21(Transmitter) close after, to transmitter circuitry 21(Transmitter) second level amplifier 212 see that impedance is a high resistant.At this moment, be connected to the V of the second port P2
DD_PAThis root line is because of the cause of reception and emission switch 214, and quilt is ground connection by force.The size of reception and emission switch 214 needs enough big, make the V of the second port P2
DD_PAThis root line can be connected to ground fully.Radiofrequency signal after through first capacitor C 1 and second capacitor C 2, sees it is ac current source toward L1 by antenna 11, and what low noise amplifier 221 adopted is the circuit framework of common grid (Common Gate).Radio frequency rf signal is when receiving, and just the NMOS by low noise amplifier 221 manages 5 source electrode and enters low noise amplifier 221.Otherwise when receiver circuit 22 cut out, transmitter circuitry 21 was just open-minded.After receiver circuit 22 cuts out, see that to the low noise amplifier 221 of receiver circuit 22 impedance is a high resistant.Transmitter circuitry 21 is with regard to operate as normal like this.After the radiofrequency signal of emission is amplified by second level amplifier 212 driving amplifiers, be passed to the outer match circuit 1 of sheet (by C1, C2 and L1 form), send in the air by antenna 11 at last by the 3rd port P3.L1 function at this moment is exactly a choke (chock) inductance, can be used as the load (Load) of second level amplifier 212 driving amplifiers.At this moment, receive and emission switch 214(TR SW) disconnect transmitter pressurizer 213(LDO) confess normal V
DD_PAVoltage is given whole transmitter circuitry 21 usefulness, and direct voltage is also powered to second level amplifier 212 driving amplifiers simultaneously.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (3)
1. radio-frequency system circuit, this circuit comprises on-chip circuit (2), and the match circuit (1) that is connected with described on-chip circuit (2) circuit; It is characterized in that described match circuit (1) is connected by first port (P1), second port (P2) and the 3rd port (P3) circuit with on-chip circuit (2);
Described on-chip circuit (2) comprises:
Transmitter circuitry (21), this transmitter circuitry (21) comprises first order amplifier (211), and the second level amplifier (212) and the transmitter pressurizer (213) that are connected with described first order amplifier (211) circuit respectively; And,
The receiver circuit (22) that is connected with described transmitter circuitry (21) circuit; This receiver circuit (22) comprises low noise amplifier (221), and the blender (222) and the receiver pressurizer (223) that are connected with described low noise amplifier (221) circuit respectively;
Described first port (P1) is connected with transmitter pressurizer (213) circuit with described receiver pressurizer (223) respectively;
Described second port (P2) is connected with first order amplifier (211) circuit with described transmitter pressurizer (213) respectively;
Described the 3rd port (P3) is connected with low noise amplifier (221) circuit with described second level amplifier (212) respectively.
2. radio-frequency system circuit as claimed in claim 1 is characterized in that, described match circuit (1) comprises:
The antenna (11) that is connected with described the 3rd port (P3) circuit; Go back circuit between described the 3rd port (P3) and the antenna (11) and be connected with second electric capacity (C2); Circuit is connected with first electric capacity (C1) between this antenna (11) and second electric capacity (C2), this first electric capacity (C1) ground connection;
Be connected in the 3rd electric capacity (C3) and the 4th electric capacity (C4) on described second port (P2) in parallel, the other end ground connection of the 3rd electric capacity (C3) and the 4th electric capacity (C4);
Circuit is connected the inductance (L1) between described second port (P2) and the 3rd port (P3); And,
Battery supply (the V that is connected with described first port (P1) circuit
Bat).
3. radio-frequency system circuit as claimed in claim 1 is characterized in that, also is provided with between described second port (P2) and described transmitter pressurizer (213) and the first order amplifier (211) to receive and emission switch (214).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101015814A CN102118179A (en) | 2011-04-22 | 2011-04-22 | RF transceiver circuit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101015814A CN102118179A (en) | 2011-04-22 | 2011-04-22 | RF transceiver circuit system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102118179A true CN102118179A (en) | 2011-07-06 |
Family
ID=44216796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101015814A Pending CN102118179A (en) | 2011-04-22 | 2011-04-22 | RF transceiver circuit system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710830A (en) * | 2012-04-28 | 2012-10-03 | 惠州Tcl移动通信有限公司 | Mobile phone |
| CN107017913A (en) * | 2017-04-14 | 2017-08-04 | 上海晶曦微电子科技有限公司 | A kind of RF transmit-receive circuit |
| TWI619354B (en) * | 2017-01-26 | 2018-03-21 | 瑞昱半導體股份有限公司 | Rf transciver and rf trasmitter of the same |
| CN108988894A (en) * | 2017-06-02 | 2018-12-11 | 聚睿电子股份有限公司 | Combined type RF transmit-receive circuit |
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| CN101282110A (en) * | 2008-04-25 | 2008-10-08 | 北京大学 | Low-power consumption single-ended input difference output low-noise amplifier |
| US20100202324A1 (en) * | 2009-02-06 | 2010-08-12 | Oleksandr Gorbachov | Radio frequency transceiver front end circuit with matching circuit voltage divider |
| CN101826847A (en) * | 2009-01-21 | 2010-09-08 | 立积电子股份有限公司 | High-efficiency single to differential amplifier |
| WO2010108030A2 (en) * | 2009-03-19 | 2010-09-23 | Qualcomm Incorporated | Common-gate common-source amplifier |
| CN201985854U (en) * | 2011-04-22 | 2011-09-21 | 上海迦美信芯通讯技术有限公司 | RF chip circuit for simplifying off-chip circuit |
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2011
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101282110A (en) * | 2008-04-25 | 2008-10-08 | 北京大学 | Low-power consumption single-ended input difference output low-noise amplifier |
| CN101826847A (en) * | 2009-01-21 | 2010-09-08 | 立积电子股份有限公司 | High-efficiency single to differential amplifier |
| US20100202324A1 (en) * | 2009-02-06 | 2010-08-12 | Oleksandr Gorbachov | Radio frequency transceiver front end circuit with matching circuit voltage divider |
| WO2010108030A2 (en) * | 2009-03-19 | 2010-09-23 | Qualcomm Incorporated | Common-gate common-source amplifier |
| CN201985854U (en) * | 2011-04-22 | 2011-09-21 | 上海迦美信芯通讯技术有限公司 | RF chip circuit for simplifying off-chip circuit |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710830A (en) * | 2012-04-28 | 2012-10-03 | 惠州Tcl移动通信有限公司 | Mobile phone |
| CN102710830B (en) * | 2012-04-28 | 2016-05-11 | 惠州Tcl移动通信有限公司 | A kind of mobile phone |
| TWI619354B (en) * | 2017-01-26 | 2018-03-21 | 瑞昱半導體股份有限公司 | Rf transciver and rf trasmitter of the same |
| CN107017913A (en) * | 2017-04-14 | 2017-08-04 | 上海晶曦微电子科技有限公司 | A kind of RF transmit-receive circuit |
| CN107017913B (en) * | 2017-04-14 | 2019-05-17 | 上海晶曦微电子科技有限公司 | A kind of RF transmit-receive circuit |
| CN108988894A (en) * | 2017-06-02 | 2018-12-11 | 聚睿电子股份有限公司 | Combined type RF transmit-receive circuit |
| CN108988894B (en) * | 2017-06-02 | 2020-08-28 | 聚睿电子股份有限公司 | Composite radio frequency transceiver circuit |
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Application publication date: 20110706 |