CN205160476U - Power amplifier with distortion compensating circuit - Google Patents
Power amplifier with distortion compensating circuit Download PDFInfo
- Publication number
- CN205160476U CN205160476U CN201521015011.3U CN201521015011U CN205160476U CN 205160476 U CN205160476 U CN 205160476U CN 201521015011 U CN201521015011 U CN 201521015011U CN 205160476 U CN205160476 U CN 205160476U
- Authority
- CN
- China
- Prior art keywords
- transistor
- connects
- negative feedback
- electric capacity
- inductance
- 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.)
- Expired - Fee Related
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses a power amplifier with distortion compensating circuit, including distortion compensating circuit and amplifier circuit, distortion compensating circuit includes the first transistor, parallel negative -feedback circuit and series connection negative feedback circuit, parallel negative -feedback circuit connection is between the collecting electrode and base of the first transistor, and series negative feedback circuit connection is between the projecting pole and ground of the first transistor. Amplifier circuit includes second transistor, third transistor, CLC filtering structure and LCL filtering structure, CLC filtering structure connects between second transistor and third transistor, and LCL filtering structure sets up at signal output part. The utility model discloses can realize the compensation to amplifier circuit's gain compensation and phase deviation. And the resonance network has been introduced, the effectual mutual interference that alleviates between DC signal and alternating current signal for the fundamental wave signal can furthest output.
Description
Technical field
The utility model relates to power amplifier, is specifically related to a kind of power amplifier with Distoriton compensating circuit.
Background technology
Along with the requirement of Communications Market to data transmission bauds is more and more higher, the modulation of signal also gets over complexity, for the current main flow communication technology, as: EDGE, WCDMA, and the LTE signal in future, not only the amplitude of its signal envelope carries useful information, and the phase place of its carrier wave comprises useful information too.For linear power amplifier, in the process of this signal of process, no matter there occurs amplitude distortion or phase distortion, all can cause demodulation error code.The distortion of this amplitude and phase place be exactly often can run in research linear prower amplifier technology AM-AM distortion and AM-PM distortion.
Utility model content
For the deficiencies in the prior art, the utility model discloses a kind of power amplifier with Distoriton compensating circuit.
The technical solution of the utility model is as follows:
With a power amplifier for Distoriton compensating circuit, comprise Distoriton compensating circuit and amplifying circuit;
Described Distoriton compensating circuit comprises the first transistor, Shunt negative feedback circuit and series negative feedback circuit; Described the first transistor is NPN transistor; Described Shunt negative feedback circuit comprises Shunt negative feedback resistance and Shunt negative feedback electric capacity; The first end of Shunt negative feedback resistance connects the collector electrode of the first transistor, and the second end of Shunt negative feedback resistance connects the first end of Shunt negative feedback electric capacity, and the second end of Shunt negative feedback electric capacity connects the base stage of the first transistor; Described series negative feedback circuit comprises series negative feedback resistance; The first end of described series negative feedback resistance connects the emitter of the first transistor, the second end ground connection; The base stage of described the first transistor is signal input part, and collector electrode connects bias supply, and Signal transmissions, as signal output part, is given described amplifying circuit by emitter;
Described amplifying circuit comprises transistor seconds, third transistor, CLC filter structure and LCL filter structure; Described transistor seconds and third transistor are all NPN transistor;
Described CLC filter structure comprises the first electric capacity, the second electric capacity and the first inductance; The first end of described first electric capacity connects the collector electrode of transistor seconds, and the second end of the first electric capacity connects the first end of the second electric capacity, and the second end of the second electric capacity connects the base stage of third transistor; The first end of described first inductance is connected to the common port of the first electric capacity and the second electric capacity, the second end ground connection; The base stage of described transistor seconds connects the emitter of the first transistor, and collector electrode connects bias supply, grounded emitter;
Described LCL filter structure comprises the second inductance, the 3rd inductance and the 3rd electric capacity; The first end of described second inductance connects the collector electrode of third transistor, and the second end of the second inductance connects the first end of the 3rd inductance, and the second end of the 3rd inductance is the signal output part of power amplifier; The first end of described 3rd electric capacity is connected to the common port of the second inductance and the 3rd inductance, the second end ground connection; The collector electrode of described third transistor connects bias supply, grounded emitter;
Its further technical scheme is: also comprise two resonant networks; Described resonant network comprises the resonant capacitance and resonant inductance that are connected in parallel; One end of first resonant network connects bias supply, and the other end is connected to the collector electrode of transistor seconds; One end of second resonant network connects bias supply, and the other end is connected to the collector electrode of third transistor.
Advantageous Effects of the present utility model is:
The utility model discloses a kind of power amplifier with Distoriton compensating circuit, by the negative feedback network of two in Distoriton compensating circuit, the compensation of gain compensation to amplifying circuit and phase deviation can be realized, improve AM-AM distortion and AM-PM distortion.And the utility model introduces resonant network, effectively alleviate the mutual interference between direct current signal and AC signal, fundamental signal can be exported to greatest extent.Through test, the utility model, in the band limits of 1.5 ~ 1.8, contrasts power amplifier of the same type, and maximum power added efficiency improves greatly.
Accompanying drawing explanation
Fig. 1 is circuit structure diagram of the present utility model.
Fig. 2 is the gain curve of the Distoriton compensating circuit of embodiment.
Fig. 3 is the phase deviation curve of the Distoriton compensating circuit of embodiment.
Embodiment
Fig. 1 is circuit structure diagram of the present utility model.The utility model comprises Distoriton compensating circuit and amplifying circuit.Distoriton compensating circuit is as input stage, and amplifying circuit is as the rear class of Distoriton compensating circuit.
Distoriton compensating circuit comprises the first transistor T1, Shunt negative feedback circuit and series negative feedback circuit.
The first transistor T1 is NPN transistor.Shunt negative feedback circuit comprises Shunt negative feedback resistance Rf and Shunt negative feedback electric capacity Cf.The first end of Shunt negative feedback resistance Rf connects the collector electrode of the first transistor T1, and second end of Shunt negative feedback resistance Rf connects the first end of Shunt negative feedback electric capacity Cf, and second end of Shunt negative feedback electric capacity Cf connects the base stage of the first transistor T1.Series negative feedback circuit comprises series negative feedback resistance Re, and the first end of series negative feedback resistance Re connects the emitter of the first transistor T1, the second end ground connection.The base stage of the first transistor T1 is the signal input part of power amplifier, need be exaggerated AC signal input thus, collector electrode connect bias supply, emitter as signal output part, by the signal transmission through Distoriton compensating circuit process to amplifying circuit.
In FIG, the signal source of power amplifier is expressed as a voltage source and a current source, specifically comprises voltage source Vcc, the voltage source resistance Rcc, the current source Ig that connect with voltage source Vcc, the current source resistance Rg in parallel with current source Ig.The signal source of power amplifier is all connected to the base stage of the first transistor T1, as inputted signal.
Shunt negative feedback resistance Rf, Shunt negative feedback electric capacity Cf and the first transistor T1 constitute a Shunt negative feedback network jointly, and series negative feedback resistance Re and the first transistor T1 constitutes a series negative feedback network jointly.Shunt negative feedback network makes input impedance reduce, and series negative feedback network makes input impedance increase, and according to the situation of whole circuit, can adjust the feedback factor of series negative feedback network and Shunt negative feedback network, makes the bandwidth match of itself and input signal.In addition, two kinds of negative feedback networks can make the power gain of amplifying circuit more stable.
Fig. 2 is the gain curve of the Distoriton compensating circuit of embodiment.Fig. 3 is the phase deviation curve of the Distoriton compensating circuit of embodiment.Fig. 2 and Fig. 3 is the data after normalization, shows in the parameter situation of the present embodiment, the effect of Distoriton compensating circuit.As can be seen from Fig. 2 and Fig. 3, Distoriton compensating circuit can produce the situation of gain increase and phase deviation, then can compensate the skew of the corresponding gain of amplifying circuit and phase place, and the linear degree of the amplifying circuit of rear class is increased.According to the signal input condition of reality and can amplify needs, the parameter of adjustment Distoriton compensating circuit, i.e. the corresponding gain of adjustable and phase deviation, to compensate the distortion of amplifying circuit.
Amplifying circuit comprises transistor seconds T2, third transistor T3, CLC filter structure and LCL filter structure.
CLC filter structure comprises the first electric capacity C1, the second electric capacity C2 and the first inductance L 1.The first end of the first electric capacity C1 connects the collector electrode of transistor seconds T2, and second end of the first electric capacity C1 connects the first end of the second electric capacity C2, and second end of the second electric capacity C2 connects the base stage of third transistor T3.The first end of the first inductance L 1 is connected to the common port of the first electric capacity C1 and the second electric capacity C2, the second end ground connection.The base stage of transistor seconds T2 connects the emitter of the first transistor T1, and receive the signal that Distoriton compensating circuit transmits, collector electrode connects bias supply, grounded emitter.
LCL filter structure comprises the second inductance L 2, the 3rd inductance L 3 and the 3rd electric capacity C3.The first end of the second inductance L 2 connects the collector electrode of third transistor T3, and the second end of the second inductance L 2 connects the first end of the 3rd inductance L 3, and the second end of the 3rd inductance L 3 is signal output part, exports through the signal handled by power amplifier.The first end of the 3rd electric capacity C3 is connected to the common port of the second inductance L 2 and the 3rd inductance L 3, the second end ground connection.The collector electrode of third transistor T3 connects bias supply, grounded emitter.
Transistor seconds T2 and third transistor T3 serves the effect that signal amplifies.CLC filter structure and LCL filter structure play removing High-frequency Interference, reduce the effect of amplifying noise.
As a more excellent technical scheme, the utility model also comprises two resonant networks.Resonant network comprises the resonant capacitance C and resonance inductance L that are connected in parallel.One end of first resonant network connects bias supply, and the other end is connected to the collector electrode of transistor seconds T2.One end of second resonant network connects bias supply, and the other end is connected to the collector electrode of third transistor T3.That is: after resonant capacitance C and the parallel connection of resonance inductance L, this parallel circuits one end connects bias supply, and the other end connects transistor.The numerical value of adjustable resonant capacitance C and resonance inductance L, makes the resonance frequency of resonant network identical with amplified fundamental frequency, effectively alleviates the mutual interference between direct current signal and AC signal, and fundamental signal can be exported to greatest extent.
The input and output auxiliary circuit of subsidiary book utility model practical function is also comprised in Fig. 1.
The input of Distoriton compensating circuit is also connected with the first input capacitance Cin1, and the first input capacitance Cin1 is connected between the base stage of signal input part and the first transistor T1.The output of Distoriton compensating circuit is provided with the first output capacitance Cout1, and the first end of the first output capacitance Cout1 connects the emitter of the first transistor T1, and the second end connects amplifying circuit.
The input of amplifying circuit is connected with the second input inductance L in2 and the second input capacitance Cin2; The first end of the second input inductance L in2 connects the first output capacitance Cout1, second end connects the base stage of transistor seconds T2, the first end of the second input capacitance Cin2 is connected to the common port of the second input inductance L in2 and the first output capacitance Cout1, the second end ground connection of the second input capacitance Cin2.The output of amplifying circuit is also connected with the second output capacitance Cout2, and the second output capacitance Cout2 connects the signal output of LCL filter structure.
Input and output auxiliary circuit can filter clutter, makes circuit function more stable.
Above-described is only preferred implementation of the present utility model, and the utility model is not limited to above embodiment.Be appreciated that the oher improvements and changes that those skilled in the art directly derive or associate under the prerequisite not departing from spirit of the present utility model and design, all should think and be included within protection range of the present utility model.
Claims (2)
1. with a power amplifier for Distoriton compensating circuit, it is characterized in that: comprise Distoriton compensating circuit and amplifying circuit;
Described Distoriton compensating circuit comprises the first transistor (T1), Shunt negative feedback circuit and series negative feedback circuit; Described the first transistor (T1) is NPN transistor; Described Shunt negative feedback circuit comprises Shunt negative feedback resistance (Rf) and Shunt negative feedback electric capacity (Cf); The first end of Shunt negative feedback resistance (Rf) connects the collector electrode of the first transistor (T1), second end of Shunt negative feedback resistance (Rf) connects the first end of Shunt negative feedback electric capacity (Cf), and the second end of Shunt negative feedback electric capacity (Cf) connects the base stage of the first transistor (T1); Described series negative feedback circuit comprises series negative feedback resistance (Re); The first end of described series negative feedback resistance (Re) connects the emitter of the first transistor (T1), the second end ground connection; The base stage of described the first transistor (T1) is signal input part, and collector electrode connects bias supply, and Signal transmissions, as signal output part, is given described amplifying circuit by emitter;
Described amplifying circuit comprises transistor seconds (T2), third transistor (T3), CLC filter structure and LCL filter structure; Described transistor seconds (T2) and third transistor (T3) are all NPN transistor;
Described CLC filter structure comprises the first electric capacity (C1), the second electric capacity (C2) and the first inductance (L1); The first end of described first electric capacity (C1) connects the collector electrode of transistor seconds (T2), second end of the first electric capacity (C1) connects the first end of the second electric capacity (C2), and the second end of the second electric capacity (C2) connects the base stage of third transistor (T3); The first end of described first inductance (L1) is connected to the common port of the first electric capacity (C1) and the second electric capacity (C2), the second end ground connection; The base stage of described transistor seconds (T2) connects the emitter of the first transistor (T1), and collector electrode connects bias supply, grounded emitter;
Described LCL filter structure comprises the second inductance (L2), the 3rd inductance (L3) and the 3rd electric capacity (C3); The first end of described second inductance (L2) connects the collector electrode of third transistor (T3), second end of the second inductance (L2) connects the first end of the 3rd inductance (L3), and the second end of the 3rd inductance (L3) is the signal output part of power amplifier; The first end of described 3rd electric capacity (C3) is connected to the common port of the second inductance (L2) and the 3rd inductance (L3), the second end ground connection; The collector electrode of described third transistor (T3) connects bias supply, grounded emitter.
2., as claimed in claim 1 with the power amplifier of Distoriton compensating circuit, it is characterized in that: also comprise two resonant networks; Described resonant network comprises the resonant capacitance (C) and resonant inductance (L) that are connected in parallel; One end of first resonant network connects bias supply, and the other end is connected to the collector electrode of transistor seconds (T2); One end of second resonant network connects bias supply, and the other end is connected to the collector electrode of third transistor (T3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521015011.3U CN205160476U (en) | 2015-12-09 | 2015-12-09 | Power amplifier with distortion compensating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521015011.3U CN205160476U (en) | 2015-12-09 | 2015-12-09 | Power amplifier with distortion compensating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205160476U true CN205160476U (en) | 2016-04-13 |
Family
ID=55696117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521015011.3U Expired - Fee Related CN205160476U (en) | 2015-12-09 | 2015-12-09 | Power amplifier with distortion compensating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205160476U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107547058A (en) * | 2016-06-24 | 2018-01-05 | 意法半导体股份有限公司 | System and method for multi-stage operational amplifier |
| CN111682859A (en) * | 2020-07-09 | 2020-09-18 | 西安电子科技大学 | Power amplifier of low-power consumption AB class CMOS |
-
2015
- 2015-12-09 CN CN201521015011.3U patent/CN205160476U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107547058A (en) * | 2016-06-24 | 2018-01-05 | 意法半导体股份有限公司 | System and method for multi-stage operational amplifier |
| CN111682859A (en) * | 2020-07-09 | 2020-09-18 | 西安电子科技大学 | Power amplifier of low-power consumption AB class CMOS |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106452377B (en) | A kind of radio-frequency power amplifier of adaptive equalization | |
| CN105515542B (en) | A kind of radio-frequency power amplifier of stacked structure | |
| US8515364B2 (en) | Radio-frequency transmitter and amplifier | |
| JP2019118075A (en) | Matching circuit and power amplification circuit | |
| CN109560777B (en) | Active bias Casode radio frequency amplifier | |
| CN107863939B (en) | Low-power consumption feedback type power amplifying circuit | |
| JP2013183234A (en) | Amplifier | |
| JP2021103851A (en) | Power amplifier circuit | |
| CN101888212B (en) | Circuit structure capable of increasing linearity and power added efficiency of power amplifier | |
| CN201726369U (en) | Radio-frequency power amplifier circuit with function of adjusting pre-distortion | |
| CN205160476U (en) | Power amplifier with distortion compensating circuit | |
| CN201726362U (en) | Circuit structure for improving linearity and PAE of power amplifier | |
| CN205320035U (en) | High linearity's stack structure's RF power amplifier | |
| CN205356276U (en) | Broadband power amplification circuit | |
| CN101882912A (en) | Radio-frequency CASCODE structure power amplifier with improved linearity and power added efficiency | |
| CN201726361U (en) | Filter circuit capable of improving linearity of power amplifier and power added efficiency | |
| CN101882913A (en) | Circuit for improving linearity and power added efficiency of power amplifier | |
| CN201726363U (en) | Circuit capable of improving linearity and power-added efficiency of power amplifier | |
| CN105790719A (en) | Method and apparatus for promoting DPD (Digital Pre-Distortion) performance of radio frequency power amplifier | |
| CN216490516U (en) | Pulse modulation device for simulating Gaussian waveform | |
| CN101882915B (en) | Push-pull type radio-frequency power amplifier with improved linearity | |
| CN202713234U (en) | Broadband adapting radio-frequency power amplification device | |
| CN101882914A (en) | Efficiency and linearity-enhanced power amplifier | |
| JP2011211533A (en) | Amplifier circuit and radio communication apparatus | |
| CN201733280U (en) | Power amplifier with RF (radio frequency) CASCODE structure and increased linearity as well as power attaching efficiency |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160413 Termination date: 20201209 |