CN115208329A - Passive transconductance-enhanced differential amplification circuit - Google Patents
Passive transconductance-enhanced differential amplification circuit Download PDFInfo
- Publication number
- CN115208329A CN115208329A CN202210898709.2A CN202210898709A CN115208329A CN 115208329 A CN115208329 A CN 115208329A CN 202210898709 A CN202210898709 A CN 202210898709A CN 115208329 A CN115208329 A CN 115208329A
- Authority
- CN
- China
- Prior art keywords
- output
- input
- matching
- bias
- inverting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/56—Modifications of input or output impedances, not otherwise provided for
- H03F1/565—Modifications of input or output impedances, not otherwise provided for using inductive elements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
- H03F3/45071—Differential amplifiers with semiconductor devices only
- H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
- H03F3/45475—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using IC blocks as the active amplifying circuit
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a passive transconductance-enhanced differential amplifying circuit, which comprises: the input signal enhancement, matching and biasing network is used for completing signal enhancement of a radio frequency input signal, impedance matching of an input module and direct current biasing; the input module is used for completing the enhancement and matching of the input signal and the preliminary amplification of the radio frequency signal output by the bias network; the interstage matching and biasing network is used for completing interstage matching between the two stages of the input module and the output module; the output module is used for further amplifying the radio-frequency signal which is preliminarily amplified by the input module; and the output matching and biasing network is used for completing output impedance matching and direct current biasing of the output module.
Description
Technical Field
The invention relates to the technical field of radio frequency front-end integrated circuits, in particular to a passive transconductance-enhanced differential amplification circuit.
Background
As shown in fig. 1, the conventional two-stage cascaded differential amplification rf front-end circuit includes an input matching and biasing network 10, an input module 20, an inter-stage matching and biasing network 30, an output module 40, and an output matching and biasing network 50.
Wherein the input and matching and biasing network 10 is formed by a first input capacitor C 1 A second input capacitor C 2 Source feedback inductor L s And gate resonance matching inductance L g A signal enhancing and inputting module for completing the RF input signals RFin + and RFin-20 impedance matching and dc biasing; the input module 20 is a differential input stage, and is configured to perform preliminary amplification on the radio frequency signal; the interstage matching and biasing network 30 is composed of a first drain electrode inductance L d1 First inter-stage capacitor C 3 And a second inter-stage capacitor C 4 A first bias resistor R 1i And a second bias resistor R 2i The impedance matching circuit is used for completing interstage matching between two stages of the input module 20 and the output module 40, namely matching of input impedance and output impedance and direct current bias; the output module 40 is a differential output stage, and is used for further amplifying the radio frequency signal; the output matching and biasing network 50 is formed by a second drain inductance L d2 A first output capacitor C 5 A second output capacitor C 6 Is used for completing the output impedance matching and DC bias of the output module 40, and the source feedback inductor L in the prior art s And gate resonance matching inductance L g And the device is independently arranged and is simple to debug.
In order to increase the communication data transmission rate and improve the number of channels, increasing the frequency band, increasing the frequency, and even millimeter wave band communication are often adopted. However, transmission loss of a high-frequency signal environment increases with frequency increase, and single-stage intrinsic gain of a silicon-based device decreases with frequency increase, so that a high-frequency and millimeter-wave low-noise amplification circuit usually adopts a multi-stage structure, and needs to be designed for low power consumption and gain improvement and enhancement.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a passive transconductance enhancement differential amplification circuit, which utilizes a transformer formed by cross electromagnetic passive coupling of a differential input feedback inductor and a resonant matching inductor to realize the equivalent transconductance enhancement of the amplitude increase of an input effective voltage signal, improves the gain without increasing the area power consumption, and simultaneously saves the power consumption by multiplexing the input and output stage bias currents, thereby comprehensively realizing the low-cost, low-power consumption and high-gain performance.
To achieve the above and other objects, the present invention provides a passive transconductance enhanced differential amplifier circuit, including:
the input signal enhancement, matching and biasing network is used for completing signal enhancement of a radio frequency input signal, impedance matching of an input module and direct current biasing;
the input module is used for completing the enhancement and matching of the input signal and the preliminary amplification of the radio frequency signal output by the bias network;
the interstage matching and biasing network is used for completing interstage matching between the two stages of the input module and the output module;
the output module is used for further amplifying the radio-frequency signal which is preliminarily amplified by the input module;
and the output matching and biasing network is used for completing output impedance matching and direct current biasing of the output module.
Preferably, the input signal enhancement and matching and biasing network utilizes a differential input source feedback inductance (L) s ) And a first gate resonant matching inductor (L) g ) The cross electromagnetic passive coupling forms a transformer, the amplitude of the radio frequency input signal is increased to (1 + k1) times, and the equivalent transconductance is increased by k1 times.
Preferably, the input signal boost and matching and biasing network comprises a first input capacitance (C) 1 ) A second input capacitor (C) 2 ) Cross-electromagnetic passive coupled source feedback inductor (L) s ) And a first gate resonant matching inductor (L) g ) The first radio frequency input signal (RFin +) is connected to the first input capacitance (C) 1 ) One terminal of (a), a first input capacitance (C) 1 ) Is connected to the input module and a first gate resonant matching inductance (L) g ) A second radio frequency input signal (RFin-) is connected to a second input capacitance (C) 2 ) One terminal of (C), a second input capacitance (C) 2 ) Is connected to the input module and a first gate resonant matching inductance (L) g ) First grid resonant matching inductance (L) g ) Is tapped off with a first gate bias voltage (V) g1 ) First gate resonant matching inductance (L) g ) And source feedback inductance (L) s ) The cross electromagnetic passive coupling constitutes a transformer with a coupling coefficient of k 1.
Preferably, the input module is a differential input stage, the non-inverting input terminal of which is connected to the first input capacitor (C) 1 ) The inverting input end is connected with the second endTwo input capacitance (C) 2 ) A source feedback terminal (DC-) of the inverting amplifier circuit of the input module and the source feedback inductor (L) s ) Is connected with the same name end of the same-phase amplifying circuit, and a source electrode feedback end (DC +) of the same-phase amplifying circuit is connected with the source electrode feedback inductor (L) s ) The different name ends are connected.
Preferably, the inter-stage matching and biasing network comprises a first drain inductance (L) d1 ) First inter-stage capacitance (C) 3 ) A second inter-stage capacitance (C) 4 ) A first bias resistor (R) 1i ) And a second bias resistor (R) 2i ) The in-phase output end of the in-phase amplifying circuit of the input module is connected with a first drain electrode inductor (L) d1 ) And a first inter-stage capacitance (C) 3 ) The inverting output terminal of the inverting amplifying circuit of the input module is connected with the first drain inductor (L) d1 ) And the other terminal of (C) and a second inter-stage capacitance (C) 4 ) First drain inductance (L) d1 ) Is connected to the supply voltage (Vdd), a first inter-stage capacitance (C) 3 ) And the other end of the output module and a first bias resistor (R) 1i ) Said second inter-stage capacitance (C) 4 ) Is connected to the output module and a second bias resistor (R) 2i ) One terminal of (1), a first bias resistor (R) 1i ) And the other end of the first bias resistor (R) and a second bias resistor (R) 2i ) Is connected to a second gate bias voltage (V) g2 )。
Preferably, the output module is a differential output stage, and the non-inverting input end of the differential output stage is connected with the first inter-stage capacitor (C) 3 ) The inverting input end is connected with the second inter-stage capacitor (C) 4 ) The in-phase output end of the in-phase amplifying circuit and the reverse phase output end of the reverse phase amplifying circuit are connected with the output matching and biasing network, and the first bias end (DC-) of the source electrode of the reverse phase amplifying circuit and the second bias end (DC +) of the source electrode of the in-phase amplifying circuit are grounded.
Preferably, the output matching and biasing network comprises a second drain inductance (L) d2 ) A first output capacitor (C) 5 ) A second output capacitor (C) 6 ) The in-phase output end of the in-phase amplifying circuit of the output module is connected with a second drain electrode inductor (L) d2 ) IsOne terminal and a first output capacitor (C) 5 ) The inverting output end of the inverting amplifying circuit of the input module is connected with the second drain electrode inductor (L) d2 ) And a second output capacitance (C) 6 ) One terminal of (1), second drain inductance (L) d2 ) Is connected to a supply voltage (Vdd), said first output capacitor (C) 5 ) The other end of (i.e. the radio frequency output signal non-inverting terminal (RFout +)), and the second output capacitor (C) 6 ) The other end of the line (RFout-) is the radio frequency output signal inverting terminal (RFout-).
Preferably, the output module comprises a differential output stage, a cross-coupled circuit and a biased ground capacitor (C) gnd ) A first bias terminal (DC-) of the source of the inverting amplifier circuit of the output module is connected with a second bias terminal (DC +) of the source of the in-phase amplifier circuit and is connected to the bias grounding capacitor (C) gnd ) And a first drain inductance (L) of said inter-stage matching and biasing network d1 ) Said bias grounded capacitance (C) gnd ) Is grounded, and the in-phase output end of the output module is also connected with the first cross-coupling capacitor (C) of the cross-coupling circuit 1i ) A non-inverting output terminal connected to the non-inverting amplifier circuit of the input module, a first drain inductance (L) d1 ) And a first inter-stage capacitance (C) 3 ) The inverting output terminal of the output module further passes through a second cross-coupling capacitor (C) of the cross-coupling circuit 2i ) An inverting output terminal connected to the inverting amplifier circuit of the input module, a first drain inductor (L) d1 ) And the other end of the first inter-stage capacitance (C) 4 ) To the end of (a).
Preferably, the interstage matching and biasing network comprises an interstage biasing resistance (R) i ) And stage bias decoupling capacitor (C) i ) A first drain inductance (L) coupled to the transformer d1 ) Resonant matching inductance (L) with the second gate g2 ) The in-phase output end of the in-phase amplifying circuit of the input module is connected with the first drain electrode inductor (L) d1 ) The inverting output end of the inverting amplifying circuit of the input module is connected with the first drain electrode inductor (L) d1 ) The first drain inductance (L) d1 ) InA tap connected to the output module, a second gate resonant matching inductor (L) g2 ) The homonymous terminal is connected to the non-inverting input terminal of the output module, and the second gate is resonant with the matching inductor (L) g2 ) The different name end is connected to the inverted input end of the output module, and the second grid resonance matches the inductance (L) g2 ) Is connected to an inter-stage bias resistor (R) i ) And an inter-stage bias decoupling capacitor (C) i ) One terminal of (1), an inter-stage bias resistance (R) i ) And the other end of the inter-stage bias decoupling capacitor (C) i ) Is connected to a second gate bias voltage (V) g2 )。
Preferably, the output module comprises a differential output stage, a cross-coupled circuit and a biased ground capacitor (C) gnd ) A first bias terminal (DC-) of the source of the inverting amplifier circuit of the output module is connected with a second bias terminal (DC +) of the source of the in-phase amplifier circuit and is connected to the bias grounding capacitor (C) gnd ) And first drain inductance (L) d1 ) Said bias grounded capacitance (C) gnd ) The other end of the second switch is grounded; the in-phase output end of the output module is also connected with a first cross coupling capacitor (C) of a cross coupling circuit 1i ) A non-inverting output terminal connected to the non-inverting amplifier circuit of the input module, a first drain inductor d1 ) And a first inter-stage capacitance (C) 3 ) The inverting output terminal of said output module passes through a second cross-coupling capacitor (C) of said cross-coupling circuit 2i ) An inverting output terminal connected to the inverting amplifier circuit of the input module, a first drain inductor (L) d1 ) And the other end of (C) and a first inter-stage capacitance (C) 4 ) To the end of (a).
Compared with the prior art, the passive transconductance enhancement differential amplification circuit forms the transformer by cross electromagnetic passive coupling of the differential input feedback inductor and the resonant matching inductor, so that the equivalent transconductance enhancement of the amplitude of the input effective voltage signal is realized, the area power consumption is not increased, the gain is improved, meanwhile, the power consumption can be saved by multiplexing the input and output level bias currents, and the low-cost, low-power consumption and high-gain performance can be comprehensively realized.
Drawings
Fig. 1 is a circuit configuration diagram of a conventional two-stage cascade differential amplification rf front-end circuit;
fig. 2 is a schematic circuit diagram of a passive transconductance enhancement differential amplifier circuit according to an exemplary embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a passive transconductance enhancement differential amplifier circuit according to another exemplary embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a passive transconductance enhancement differential amplifier circuit according to still another exemplary embodiment of the present invention;
FIG. 5 is a graph illustrating gain improvement in comparison to the prior art.
Detailed Description
Other advantages and capabilities of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification by describing embodiments of the present invention with specific embodiments and by referring to the attached drawings. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Fig. 2 is a schematic circuit structure diagram of a passive transconductance enhancement differential amplifier circuit according to an exemplary embodiment of the invention. As shown in fig. 2, the passive transconductance enhancement differential amplifier circuit of the present invention includes an input signal enhancement and matching and biasing network 10, an input module 20, an inter-stage matching and biasing network 30, an output module 40, and an output matching and biasing network 50.
Wherein the input signal enhancement, matching and biasing network 10 is formed by a first input capacitor C 1 A second input capacitor C 2 Source feedback inductor L passively coupled with cross electromagnet s And a first gate resonant matching inductor L g A component for completing signal enhancement of the radio frequency input signals RFin + and RFin-, impedance matching and DC bias of the input module 20; the input module 20 is a differential input stage, and is configured to perform preliminary amplification on the radio frequency signal; the interstage matching and biasing network 30 is composed of a first drain inductance L d1 First inter-stage capacitor C 3 A second inter-stage capacitor C 4 First biasResistance R 1i And a second bias resistor R 2i The impedance matching circuit is used for completing interstage matching between the two stages of the input module 20 and the output module 40, namely matching of input impedance and output impedance and direct current bias; the output module 40 is a differential output stage, and is used for further amplifying the radio frequency signal; the output matching and biasing network 50 is composed of a second drain inductor L d2 A first output capacitor C 5 A second output capacitor C 6 And is used for completing output impedance matching and dc biasing of the output module 40.
The radio frequency input signal RFin + is connected to the first input capacitor C 1 One terminal of (1), a first input capacitance C 1 Is connected to the non-inverting input terminal of the input module 20 and the first gate resonant matching inductor L g The radio frequency input signal RFin-is connected to the second input capacitor C 2 One terminal of (1), a second input capacitance C 2 Is connected to the inverting input terminal of the input block 20 and the first gate resonant matching inductor L g The first grid resonance matching inductance L g Is tapped off with a first gate bias voltage V g1 (ii) a Source feedback terminal DC-and source feedback inductor L of inverting amplification circuit of input module 20 s Is connected to the source feedback terminal DC + and the source feedback inductor L of the in-phase amplifying circuit of the input module 20 s Is connected with the different name end of the source electrode feedback inductor L s The center tap of (1) is grounded; first gate resonant matching inductor L g And source feedback inductor L s The cross electromagnetic passive coupling forms a transformer with a coupling coefficient of k 1;
the in-phase output terminal of the in-phase amplifying circuit of the input module 20 is connected to the first drain inductor L d1 And a first inter-stage capacitance C 3 The inverting output terminal of the inverting amplifying circuit of the input module 20 is connected to the first drain inductor L d1 And the other end of the second inter-stage capacitance C 4 First drain inductor L d1 Is connected with a power supply voltage Vdd and a first stage capacitor C 3 Is connected to the non-inverting input terminal of the output module 40 and the first bias resistor R 1i One terminal of (C), a second inter-stage capacitance C 4 Another end of the die is connected with an output dieInverting input of block 40 and second biasing resistor R 2i One terminal of (1), a first bias resistor R 1i And the other end of the second bias resistor R 2i Is connected to a second gate bias voltage V g2 ；
The in-phase output end of the in-phase amplifying circuit of the output module 40 is connected with the second drain inductor L d2 And a first output capacitor C 5 The inverting output terminal of the inverting amplifying circuit of the input module 40 is connected to the second drain inductor L d2 And the other end of the second output capacitor C 6 One terminal of (1), a second drain inductance L d2 Is connected to the power supply voltage Vdd, the first bias terminal DC-of the source of the inverting amplifier circuit of the output module 40 and the second bias terminal DC + of the source of the non-inverting amplifier circuit are grounded, and the first output capacitor C is connected to the ground 5 The other end of the first output capacitor is the radio frequency output signal in-phase end RFout +, and the second output capacitor C 6 The other end of the rf output signal is the inverting terminal RFout-.
The invention utilizes the differential input source electrode to feed back the inductor L s And a first gate resonant matching inductor L g The cross electromagnetic passive coupling forms a transformer, so that the amplitude of an input effective voltage signal is increased to (1 + k1) times, the equivalent transconductance is enhanced by k1 times, and the gain is theoretically improved by 6dB; the passive transconductance enhancement mode does not need an additional active device and additional direct current power consumption, does not increase additional noise, and can improve the gain power consumption energy efficiency ratio; according to the invention, additional inductors and components are not required to be added, the area is not increased, the input signal enhancement, matching and biasing network are realized in a transformer coupling mode, the area is saved to a certain extent, the cost can be reduced, and the low-cost, low-power consumption and high-gain performance can be comprehensively realized.
Fig. 3 is a schematic circuit diagram of a passive transconductance enhancement differential amplifier circuit according to another exemplary embodiment of the present invention. In the present embodiment, the output module 40 is composed of a differential output stage 401, a cross-coupling circuit 402 and a bias grounding capacitor C gnd The cross-coupling circuit 402 includes a first cross-coupling capacitor C 1i And a second cross-coupling capacitor C 2i 。
On the basis of fig. 2, part of the connection lines of the interstage matching and biasing network 30 and the output module 40 are changed to implement a new function. The first bias terminal DC-of the source of the inverting amplifier circuit of the output module 40 is connected to the second bias terminal DC + of the source of the non-inverting amplifier circuit and connected to the bias ground capacitor C gnd And a first drain inductance L d1 An intermediate tap of (C), an offset grounded capacitor gnd The other end of the second switch is grounded; the non-inverting output terminal of the output module 40 is further coupled through the first cross-coupling capacitor C of the cross-coupling circuit 402 1i A non-inverting output terminal of the non-inverting amplifier circuit connected to the input module 20, a first drain inductor L d1 And a first inter-stage capacitance C 3 The inverting output terminal of the output module 40 is further connected to the second cross-coupling capacitor C of the cross-coupling circuit 402 2i An inverting output terminal of the inverting amplifying circuit connected to the input module 20, a first drain inductor L d1 And the other end of the first inter-stage capacitor C 4 To one end of (a).
Through the embodiment, the output ends of the differential input stage and the differential output stage adopt the capacitance cross coupling to realize the multi-signal link output, the transconductance of the equivalent output stage is enhanced to a certain extent, and the output gain is further improved; the differential input stage and the differential output stage share the direct current bias current, and the power consumption of the circuit can be saved by multiplexing the power consumption and the current.
Fig. 4 is a schematic circuit diagram of a passive transconductance enhancement differential amplifier circuit according to still another exemplary embodiment of the invention. As shown in fig. 4, the interstage matching and biasing network 30 is formed by an interstage biasing resistor R i And stage bias decoupling capacitor C i First drain inductor L coupled to transformer d1 Inductance L matched with second grid resonance g2 The circuit comprises a transformer, an output module 40, an input module 20, an output module 40, a phase-locked loop and a phase-locked loop, wherein the transformer is used for completing interstage matching between the two stages of the input module 20 and the output module 40, namely matching between input impedance and output impedance and direct current bias, and the transformer coupling and RC phase adjustment are utilized for improving signal coupling differential phase synchronization and reverse isolation; the output module 40 is composed of a differential output stage 401, a cross-coupling circuit 402 and a bias grounding capacitor C gnd For performing cross-coupling and current multiplexing of radio frequency signals, the cross-coupling circuit 402 includesFirst cross coupling capacitor C 1i And a second cross-coupling capacitor C 2i 。
On the basis of fig. 2, part of the connection lines of the interstage matching and biasing network 30 and the output module 40 are changed to implement a new function.
The in-phase output terminal of the in-phase amplifying circuit of the input module 20 is connected to the first drain inductor L d1 The inverting output terminal of the inverting amplifying circuit of the input module 20 is connected to the first drain inductor L d1 The first drain electrode inductance L d1 Is connected to a first bias terminal DC of the source of the inverting amplifier circuit of the output module 40, a second bias terminal DC + of the source of the non-inverting amplifier circuit, and a bias ground capacitor C gnd Second gate resonant matching inductance L g2 The same-name terminal is connected to the non-inverting input terminal of the output module 40, and the second grid resonance matching inductor L g2 The different name terminal is connected to the inverted input terminal of the output module 40, and the second grid resonance matches the inductance L g2 Is connected to an inter-stage bias resistor R i And an inter-stage bias decoupling capacitor C i One terminal of (1), an inter-stage bias resistor R i The other end of the first stage and an interstage bias decoupling capacitor C i Is connected to a second gate bias voltage V g2 ；
The first bias terminal DC-of the source of the inverting amplifier circuit of the output module 40 is connected to the second bias terminal DC + of the source of the non-inverting amplifier circuit and connected to the bias ground capacitor C gnd And the first drain inductance L d1 An intermediate tap of (C), an offset grounded capacitor gnd The other end of the first and second electrodes is grounded; the non-inverting output terminal of the output module 40 is further coupled through the first cross-coupling capacitor C of the cross-coupling circuit 402 1i A non-inverting output terminal of the non-inverting amplifier circuit connected to the input module 20, a first drain inductor L d1 And a first inter-stage capacitance C 3 The inverting output terminal of the output module 40 is further connected to the second cross-coupling capacitor C of the cross-coupling circuit 402 2i An inverting output terminal of the inverting amplifying circuit connected to the input module 20, and a first drain inductor L d1 And the other end of the first inter-stage capacitor C 4 To the end of (a).
In this embodiment, the coupling between the input stage and the output stage adopts transformer coupling and RC phase flattening adjustment to realize the inter-stage matching stage bias network to improve the signal coupling differential phase synchronization and the reverse isolation.
As shown in fig. 5, the lower curve typical in the figure is a prior art gain-frequency curve, and the upper Novel is a gain-frequency curve of the present invention, and it can be known from comparison that the Novel passive transconductance enhancement current multiplexing differential amplifier circuit achieves 5.5dB improvement of transconductance enhancement gain without increasing power consumption.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the scope of the invention should be determined from the following claims.
Claims (10)
1. A passive transconductance-enhanced differential amplification circuit, comprising:
the input signal enhancement, matching and biasing network is used for completing signal enhancement of a radio frequency input signal, impedance matching of an input module and direct current biasing;
the input module is used for completing the enhancement and matching of the input signal and the preliminary amplification of the radio frequency signal output by the bias network;
the interstage matching and biasing network is used for completing interstage matching between the two stages of the input module and the output module;
the output module is used for further amplifying the radio-frequency signal which is preliminarily amplified by the input module;
and the output matching and biasing network is used for completing output impedance matching and direct current biasing of the output module.
2. The passive transconductance-enhanced differential amplifying circuit according to claim 1, wherein said input signal enhancement and matching and biasing network utilizes a differential input source feedback inductor (L) s ) And a first gate resonant matching inductor (L) g ) Transformation formed by cross electromagnetic passive couplingThe amplitude of the radio frequency input signal is increased to (1 + k1) times, and the equivalent transconductance is enhanced by k1 times.
3. A passive transconductance-enhanced differential amplifying circuit according to claim 2, characterized in that said input signal enhancing, matching and biasing network comprises a first input capacitance (C) 1 ) A second input capacitor (C) 2 ) Source feedback inductor (L) of cross electromagnetic passive coupling s ) And a first gate resonant matching inductor (L) g ) The first radio frequency input signal (RFin +) is connected to the first input capacitance (C) 1 ) One terminal of (C), a first input capacitance (C) 1 ) Is connected to the input module and a first gate resonant matching inductance (L) g ) A second radio frequency input signal (RFin-) is connected to a second input capacitance (C) 2 ) One terminal of (C), a second input capacitance (C) 2 ) Is connected to the input module and a first gate resonant matching inductance (L) g ) First grid resonant matching inductance (L) g ) Is tapped off with a first gate bias voltage (V) g1 ) First gate resonant matching inductance (L) g ) And source feedback inductor (L) s ) The cross electromagnetic passive coupling constitutes a transformer with a coupling coefficient k 1.
4. A passive transconductance-enhanced differential amplifier circuit according to claim 3, characterized in that said input module is a differential input stage having a non-inverting input connected to said first input capacitor (C) 1 ) The inverting input terminal is connected with the second input capacitor (C) 2 ) A source feedback terminal (DC-) of the inverting amplifier circuit of the input module and the source feedback inductor (L) s ) Is connected with the same name end of the same-phase amplifying circuit, and a source electrode feedback end (DC +) of the same-phase amplifying circuit is connected with the source electrode feedback inductor (L) s ) The different name ends are connected.
5. A passive transconductance enhanced differential amplifying circuit according to claim 4, characterized in that said inter-stage matching and biasing network comprises a first drain inductance (Ld) d1 ) First inter-stage capacitance (C) 3 ) Second, secondInter-stage capacitance (C) 4 ) A first bias resistor (R) 1i ) And a second bias resistor (R) 2i ) The in-phase output end of the in-phase amplifying circuit of the input module is connected with a first drain electrode inductor (L) d1 ) And a first inter-stage capacitance (C) 3 ) The inverting output terminal of the inverting amplifying circuit of the input module is connected with the first drain inductor (L) d1 ) And the other end of the second inter-stage capacitance (C) 4 ) First drain inductance (L) d1 ) Is connected to the supply voltage (Vdd), a first inter-stage capacitance (C) 3 ) And the other end of the output module and a first bias resistor (R) 1i ) Said second inter-stage capacitance (C) 4 ) Is connected to the output module and a second bias resistor (R) 2i ) One terminal of (1), a first bias resistor (R) 1i ) And the other end of the first bias resistor (R) and a second bias resistor (R) 2i ) Is connected to a second gate bias voltage (V) g2 )。
6. A passive transconductance-enhanced differential amplifying circuit according to claim 5, characterized in that said output module is a differential output stage having a non-inverting input connected to said first inter-stage capacitor (C) 3 ) The inverting input end is connected with the second inter-stage capacitor (C) 4 ) The in-phase output end of the in-phase amplifying circuit and the reverse phase output end of the reverse phase amplifying circuit are connected with the output matching and biasing network, and the first bias end (DC-) of the source electrode of the reverse phase amplifying circuit and the second bias end (DC +) of the source electrode of the in-phase amplifying circuit are grounded.
7. A passive transconductance enhanced differential amplifying circuit according to claim 6, wherein: the output matching and biasing network includes a second drain inductance (L) d2 ) A first output capacitor (C) 5 ) A second output capacitor (C) 6 ) The in-phase output end of the in-phase amplifying circuit of the output module is connected with a second drain electrode inductor (L) d2 ) And a first output capacitor (C) 5 ) The inverting output terminal of the inverting amplifying circuit of the input module is connected with the second drain inductor (L) d2 ) The other end and the second inputOutput capacitance (C) 6 ) Second drain inductance (L) d2 ) Is connected to the supply voltage (Vdd), said first output capacitor (C) 5 ) The other end of (i.e. the radio frequency output signal non-inverting terminal (RFout +)), and the second output capacitor (C) 6 ) The other end of the line (RFout-) is the radio frequency output signal inverting terminal (RFout-).
8. A passive transconductance enhanced differential amplifying circuit according to claim 5, wherein: the output module comprises a differential output stage, a cross-coupling circuit and a bias grounding capacitor (C) gnd ) A first bias terminal (DC-) of the source of the inverting amplifier circuit of the output module is connected with a second bias terminal (DC +) of the source of the in-phase amplifier circuit and is connected to the bias grounding capacitor (C) gnd ) And a first drain inductance (L) of said inter-stage matching and biasing network d1 ) The bias grounding capacitor (C) gnd ) Is grounded, and the in-phase output end of the output module is also connected with the first cross-coupling capacitor (C) of the cross-coupling circuit 1i ) A non-inverting output terminal connected to the non-inverting amplifier circuit of the input module, a first drain inductance (L) d1 ) And a first inter-stage capacitance (C) 3 ) The inverting output terminal of the output module further passes through a second cross-coupling capacitor (C) of the cross-coupling circuit 2i ) An inverting output terminal connected to the inverting amplifier circuit of the input module, a first drain inductor (L) d1 ) And the other end of (C) and a first inter-stage capacitance (C) 4 ) To one end of (a).
9. A passive transconductance enhanced differential amplifying circuit according to claim 4, wherein: the interstage matching and biasing network comprises an interstage biasing resistance (R) i ) And stage bias decoupling capacitor (C) i ) A first drain inductance (L) coupled to the transformer d1 ) Resonant matching inductance (L) with the second gate g2 ) The in-phase output end of the in-phase amplifying circuit of the input module is connected with the first drain electrode inductor (L) d1 ) The inverting output end of the inverting amplifying circuit of the input module is connected with the first drain electrodeInductor (L) d1 ) Said first drain inductance (L) d1 ) Is connected to the output module, a second gate resonant matching inductance (L) g2 ) The homonymy terminal is connected to the non-inverting input terminal of the output module, and the second gate is resonant with the matching inductor (L) g2 ) The different name end is connected to the inverted input end of the output module, and the second grid resonance matches the inductance (L) g2 ) Is connected to an inter-stage bias resistor (R) i ) And an inter-stage bias decoupling capacitor (C) i ) One terminal of (1), an inter-stage bias resistance (R) i ) And the other terminal of (C) and an inter-stage bias decoupling capacitor (C) i ) Is connected to a second gate bias voltage (V) g2 )。
10. A passive transconductance enhancement differential amplifying circuit according to claim 9, wherein: the output module comprises a differential output stage, a cross-coupling circuit and a bias grounding capacitor (C) gnd ) A first bias terminal (DC-) of the source of the inverting amplifier circuit of the output module is connected with a second bias terminal (DC +) of the source of the in-phase amplifier circuit and is connected to the bias grounding capacitor (C) gnd ) And a first drain inductance (L) d1 ) Said bias grounded capacitance (C) gnd ) The other end of the first and second electrodes is grounded; the in-phase output end of the output module is also connected with a first cross coupling capacitor (C) of a cross coupling circuit 1i ) A non-inverting output terminal connected to the non-inverting amplifier circuit of the input module, a first drain inductor (L) d1 ) And a first inter-stage capacitance (C) 3 ) The inverting output terminal of said output module passes through a second cross-coupling capacitor (C) of said cross-coupling circuit 2i ) An inverting output terminal connected to the inverting amplification circuit of the input module, a first drain inductance (L) d1 ) And the other end of the first inter-stage capacitance (C) 4 ) To one end of (a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210898709.2A CN115208329A (en) | 2022-07-28 | 2022-07-28 | Passive transconductance-enhanced differential amplification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210898709.2A CN115208329A (en) | 2022-07-28 | 2022-07-28 | Passive transconductance-enhanced differential amplification circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115208329A true CN115208329A (en) | 2022-10-18 |
Family
ID=83583568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210898709.2A Pending CN115208329A (en) | 2022-07-28 | 2022-07-28 | Passive transconductance-enhanced differential amplification circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115208329A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115664354A (en) * | 2022-12-28 | 2023-01-31 | 广州慧智微电子股份有限公司 | Differential amplification circuit |
| CN117130963A (en) * | 2023-10-26 | 2023-11-28 | 成都市易冲半导体有限公司 | Differential signal matching circuit, differential signal matching method and communication device |
-
2022
- 2022-07-28 CN CN202210898709.2A patent/CN115208329A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115664354A (en) * | 2022-12-28 | 2023-01-31 | 广州慧智微电子股份有限公司 | Differential amplification circuit |
| CN115664354B (en) * | 2022-12-28 | 2023-04-21 | 广州慧智微电子股份有限公司 | Differential amplifying circuit |
| CN117130963A (en) * | 2023-10-26 | 2023-11-28 | 成都市易冲半导体有限公司 | Differential signal matching circuit, differential signal matching method and communication device |
| CN117130963B (en) * | 2023-10-26 | 2024-01-23 | 成都市易冲半导体有限公司 | Differential signal matching circuit, differential signal matching method and communication device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106712725A (en) | Ultra wideband high-gain low noise amplifier based on monolithic microwave integrated circuit | |
| CN115208329A (en) | Passive transconductance-enhanced differential amplification circuit | |
| CN107248850B (en) | Non-inductance low-power-consumption high-gain high-linearity broadband low-noise amplifier | |
| CN109167578B (en) | Ultra-wideband low-noise amplifier with active inductor | |
| CN110034738B (en) | Ultra-wideband low-noise amplifier based on improved impedance matching network | |
| CN113381713A (en) | Dual-band low-noise amplifier based on reconfigurable inductor | |
| US7268627B2 (en) | Pre-matching of distributed and push-pull power transistors | |
| CN112202408A (en) | Cascode radio frequency amplifier of GaN technology | |
| CN109391236B (en) | Signal amplification circuit and millimeter wave signal amplification circuit | |
| CN112865717B (en) | High-gain power amplifier based on self-adaptive linearization technology | |
| CN116888888A (en) | High efficiency dual drive power amplifier for high reliability applications | |
| CN211063579U (en) | X-waveband low-noise amplifier | |
| CN111884615B (en) | High-order broadband input impedance matching network and application thereof | |
| CN116865691A (en) | Ultra-wideband low noise amplifier with bandwidth reconfigurable technology | |
| CN109474243B (en) | Ultra-wideband low-noise amplifier | |
| CN113904635B (en) | High third-order intermodulation point field effect transistor radio frequency amplifier | |
| CN114172476B (en) | Broadband negative feedback amplifier | |
| CN112003574B (en) | K-band CMOS efficient radio frequency power amplifier circuit | |
| CN114285383A (en) | Gain amplification module of current multiplexing structure | |
| CN112087206B (en) | Ultra-low power consumption broadband low noise amplifier | |
| CN112104330B (en) | Broadband high-gain flatness radio frequency/millimeter wave power amplifier | |
| CN110492857B (en) | Radio frequency low noise amplifier integrated circuit | |
| CN112583371A (en) | Broadband cascode extremely-low noise amplifier based on LC resonant load | |
| CN115208328A (en) | Self-biased active transconductance enhancement amplifying circuit | |
| CN116996029B (en) | 6GHz to 18GHz ultra-wideband high-performance low-noise amplifier chip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |