CN207339799U - A kind of F power-like amplifiers with negative feedback structure - Google Patents
A kind of F power-like amplifiers with negative feedback structure Download PDFInfo
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- CN207339799U CN207339799U CN201720957347.4U CN201720957347U CN207339799U CN 207339799 U CN207339799 U CN 207339799U CN 201720957347 U CN201720957347 U CN 201720957347U CN 207339799 U CN207339799 U CN 207339799U
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- Prior art keywords
- matching network
- amplifier
- voltage
- power
- subharmonic
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Abstract
The utility model discloses a kind of F power-like amplifiers with negative feedback structure,Including input matching network,Voltage amplifier,Inter-stage matching network,Current amplifier,Output matching network,Current sensor loop and voltage sensor ring,The input matching network leads to input terminal by signal wire,And the input matching network is connected by voltage amplifier with inter-stage matching network,The inter-stage matching network is connected by current amplifier with output matching network,The output matching network draws output terminal by signal wire,And the output matching network is connected by current sensor loop with current amplifier,And the output matching network is connected by voltage sensor ring with voltage amplifier,The current sensor loop and voltage sensor ring use PI control modes,The F power-like amplifiers pass through current sensor loop and voltage sensor ring,It can carry out specifying power to be amplified.
Description
Technical field
Power amplifier techniques field is the utility model is related to, is specially that a kind of F class power with negative feedback structure is put
Big device.
Background technology
Power amplifier (English name：Power amplifier), referred to as " power amplifier ", refer in given distortion rate condition
Under, maximum power output can be produced to drive the amplifier of a certain load (such as loudspeaker).Power amplifier is in whole sound equipment
The pivotal role of " tissue, coordination " is played in system, can dominate whole system to a certain extent provide good sound
Matter exports, but in the prior art, power amplifier is mostly the power amplifier of low-power and high loss-type, there are it is following not
Foot part problem：
(1) general power amplifier does not have negative-feedback, so that inconvenient people carry out power adjusting, and by environment
Have a great influence, and there is a certain amount of power attenuation, be unfavorable for people's much time using；
(2) existing power amplifier, so as to there are problems that larger switching loss, thereby reduces work(because having overlay region
The efficiency of rate amplifier；
The content of the invention
In order to overcome the shortcomings of prior art, the utility model provides a kind of F class power with negative feedback structure
Amplifier, not only solved the problems, such as power amplifier using when bring, but also considerably increase the usable degree of power amplifier, increase
Add the stability of work, the convenience of bigger is provided for people's power adjusting, and it is easy to operate, it can effectively solve the problem that background skill
The problem of art proposes.
Technical solution is used by the utility model solves its technical problem：A kind of F class work(with negative feedback structure
Rate amplifier, including input matching network, voltage amplifier, inter-stage matching network, current amplifier, output matching network, electricity
Flow sensor ring and voltage sensor ring, the input matching network lead to input terminal, and the input by signal wire
Matching network is connected by voltage amplifier with inter-stage matching network, and the inter-stage matching network passes through current amplifier and output
Matching network is connected, and the output matching network draws output terminal by signal wire, and the output matching network passes through electricity
Flow sensor ring is connected with current amplifier, and the output matching network passes through voltage sensor ring and voltage amplifier phase
Even, the current sensor loop and voltage sensor ring use PI control modes.
As a kind of technical solution for having choosing of the utility model, the input matching network includes fundamental frequency matching input
Circuit, 2 subharmonic matching input circuit and 3 subharmonic matching input circuit, fundamental frequency matching input circuit, 2 times it is humorous
Ripple matches input circuit and 3 subharmonic matching input circuit is sequentially connected.
As a kind of technical solution for having choosing of the utility model, the voltage amplifier and current amplifier are common crystalline substance
Body pipe.
As a kind of technical solution for having choosing of the utility model, the inter-stage matching network is between 3 subharmonic matching type levels
Circuit.
As a kind of technical solution for having choosing of the utility model, the output matching network include 3 subharmonic match circuits,
2 subharmonic match circuits and fundamental frequency match circuit, the 3 subharmonic match circuit, 2 subharmonic match circuits and fundamental wave
Frequency match circuit is sequentially connected.
As a kind of technical solution for having choosing of the utility model, the current sensor loop and voltage sensor ring use
The form of negative-feedback.
Compared with prior art, the beneficial effects of the utility model are：
(1) the utility model is voltage amplifier and current amplifier by two transistors in power amplifier, with
Realize two-stage single-ended power amplification, but also the current sensor by being arranged between output matching network and current amplifier
Ring, the output current value for realizing power amplifier reach designated value, so as to fulfill the negative feedback type circuit of electric current, and also
By the voltage sensor ring being arranged between output matching network and voltage amplifier, the output for realizing power amplifier is electric
Pressure value reaches designated value, so as to fulfill the negative feedback type circuit of voltage, and then ensure that the stabilization of output power, reduces outer
Influence of boundary's environment to the power amplifier, it also avoid power attenuation, and then extend the service life of the power amplifier；
(2) the utility model uses output filter in transistor collector voltage or electric current in power amplifier
Harmonic components are controlled, the voltage waveform or current waveform of consolidation transistor collector so that and they do not have overlay region,
Reduce the loss of switch, improve the efficiency of power amplifier, but also using the structure of two-stage amplification form, more improve power
The adjustable range of amplifier, is widely used with what is be convenient for people to；Also by inter-stage matching network, reduce first device of power amplifier
Part, also simplifies overall structure.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the input matching network structure diagram of the utility model；
Fig. 3 is the output matching network structure diagram of the utility model；
Fig. 4 is the current sensor loop structure diagram of the utility model；
Fig. 5 is the voltage sensor ring structure schematic diagram of the utility model；
In figure：1- input matching networks；2- voltage amplifiers；3- inter-stage matching networks；4- current amplifiers；5- is exported
Matching network；6- current sensor loops；7- voltage sensor rings；8- input terminals；9- output terminals；The matching of 101- fundamental frequencies is defeated
Enter circuit；102-2 subharmonic matches input circuit；103-3 subharmonic matches input circuit；501-3 subharmonic match circuits；
502-2 subharmonic match circuits；503- fundamental frequency match circuits.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained, shall fall within the protection scope of the present invention.
The explanation of following embodiment is refer to the attached drawing, can be to the particular implementation implemented to example the utility model
Example.The direction and position term that the utility model is previously mentioned, for example, " on ", " in ", " under ", "front", "rear", "left", "right", "
It is interior ", " outer ", " side " etc., be only the direction and position with reference to annexed drawings.Therefore, the direction and position term used is to use
To illustrate and understand the utility model, and it is not used to limitation the utility model.
Embodiment：
Such as Fig. 1 and shown, the utility model provides a kind of F power-like amplifiers with negative feedback structure, including defeated
Enter matching network 1, voltage amplifier 2, inter-stage matching network 3, current amplifier 4, output matching network 5, current sensor loop 6
With voltage sensor ring 7, the input matching network 1 leads to input terminal 8 by signal wire, is convenient for people to carry out input information
Input, and the input matching network 1 is connected by voltage amplifier 2 with inter-stage matching network 3, to be carried out to input information
Voltage amplification is adjusted, and the signal after amplification voltage is filtered, then is transported in Current amplifier link, and the level
Between matching network 3 be 3 subharmonic matching type interstage circuits, the inter-stage matching network 3 is matched by current amplifier 4 with output
Network 5 is connected, and current regulation is carried out with the signal after being adjusted to voltage, wherein the voltage amplifier 2 and current amplifier 4
It is normal transistor, the output matching network 5 draws output terminal 9 by signal wire, is convenient for people to after power amplification
Information export out；
As shown in Figure 1, Figure 4 and Figure 5, the output matching network 5 passes through current sensor loop 6 and 4 phase of current amplifier
Even, and the output matching network 5 is connected by voltage sensor ring 7 with voltage amplifier 2, the current sensor loop 6
Use PI control modes with voltage sensor ring 7, so as to form Voltage loop and electric current loop, improve output signal voltage and
The stability of electric current, and the constant of output power is maintained, wherein the current sensor loop 6 and voltage sensor ring 7 are equal
Using the form of negative-feedback；
As depicted in figs. 1 and 2, the input matching network 1 includes fundamental frequency matching input circuit 101,2 subharmonic
Match 102 and 3 subharmonic of input circuit matching input circuit 103, the fundamental frequency matching input circuit 101,2 subharmonic
It is sequentially connected with 102 and 3 subharmonic of input circuit matching input circuit 103, so as to improve the ability of filtering harmonics.
As shown in figures 1 and 3, the output matching network 5 includes 3 subharmonic match circuits 501,2 subharmonic matching electricity
Road 502 and fundamental frequency match circuit 503, the 3 subharmonic match circuit 501,2 subharmonic match circuits 502 and fundamental wave frequency
Rate match circuit 503 is sequentially connected, so as to improve the filtering process ability of the power amplifier.
In conclusion the utility model is mainly characterized by：
(1) the utility model is voltage amplifier and current amplifier by two transistors in power amplifier, with
Realize two-stage single-ended power amplification, but also the current sensor by being arranged between output matching network and current amplifier
Ring, the output current value for realizing power amplifier reach designated value, so as to fulfill the negative feedback type circuit of electric current, and also
By the voltage sensor ring being arranged between output matching network and voltage amplifier, the output for realizing power amplifier is electric
Pressure value reaches designated value, so as to fulfill the negative feedback type circuit of voltage, and then ensure that the stabilization of output power, reduces outer
Influence of boundary's environment to the power amplifier, it also avoid power attenuation, and then extend the service life of the power amplifier；
(2) the utility model uses output filter in transistor collector voltage or electric current in power amplifier
Harmonic components are controlled, the voltage waveform or current waveform of consolidation transistor collector so that and they do not have overlay region,
Reduce the loss of switch, improve the efficiency of power amplifier, but also using the structure of two-stage amplification form, more improve power
The adjustable range of amplifier, is widely used with what is be convenient for people to；Also by inter-stage matching network, reduce first device of power amplifier
Part, also simplifies overall structure.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of the spirit or essential attributes without departing substantially from the utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new
The scope of type is indicated by the appended claims rather than the foregoing description, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are embraced therein.Any reference numeral in claim should not be considered as limitation
Involved claim.
Claims (6)
- A kind of 1. F power-like amplifiers with negative feedback structure, it is characterised in that：Put including input matching network (1), voltage Big device (2), inter-stage matching network (3), current amplifier (4), output matching network (5), current sensor loop (6) and voltage pass Sensor ring (7), the input matching network (1) lead to input terminal (8), and the input matching network by signal wire (1) it is connected by voltage amplifier (2) with inter-stage matching network (3), the inter-stage matching network (3) passes through current amplifier (4) it is connected with output matching network (5), the output matching network (5) draws output terminal (9) by signal wire, and described Output matching network (5) is connected by current sensor loop (6) with current amplifier (4), and the output matching network (5) It is connected by voltage sensor ring (7) with voltage amplifier (2), the current sensor loop (6) and voltage sensor ring (7) are equal Using PI control modes.
- A kind of 2. F power-like amplifiers with negative feedback structure according to claim 1, it is characterised in that：It is described defeated Entering matching network (1) includes fundamental frequency matching input circuit (101), 2 subharmonic matching input circuit (102) and 3 subharmonic Match input circuit (103), the fundamental frequency matching input circuit (101), 2 subharmonic matching input circuit (102) and 3 times Harmonic match input circuit (103) is sequentially connected.
- A kind of 3. F power-like amplifiers with negative feedback structure according to claim 1, it is characterised in that：The electricity It is normal transistor to press amplifier (2) and current amplifier (4).
- A kind of 4. F power-like amplifiers with negative feedback structure according to claim 1, it is characterised in that：The level Between matching network (3) be 3 subharmonic matching type interstage circuits.
- A kind of 5. F power-like amplifiers with negative feedback structure according to claim 4, it is characterised in that：It is described defeated Going out matching network (5) includes 3 subharmonic match circuits (501), 2 subharmonic match circuits (502) and fundamental frequency match circuit (503), the 3 subharmonic match circuit (501), 2 subharmonic match circuits (502) and fundamental frequency match circuit (503) according to It is secondary to be connected.
- A kind of 6. F power-like amplifiers with negative feedback structure according to claim 1, it is characterised in that：The electricity Flow sensor ring (6) and voltage sensor ring (7) use the form of negative-feedback.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720957347.4U CN207339799U (en) | 2017-08-02 | 2017-08-02 | A kind of F power-like amplifiers with negative feedback structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720957347.4U CN207339799U (en) | 2017-08-02 | 2017-08-02 | A kind of F power-like amplifiers with negative feedback structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207339799U true CN207339799U (en) | 2018-05-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720957347.4U Expired - Fee Related CN207339799U (en) | 2017-08-02 | 2017-08-02 | A kind of F power-like amplifiers with negative feedback structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207339799U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160678A (en) * | 2019-06-21 | 2019-08-23 | 上海工业自动化仪表研究院有限公司 | Power amplification circuit for magnetoelastic sensor |
-
2017
- 2017-08-02 CN CN201720957347.4U patent/CN207339799U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160678A (en) * | 2019-06-21 | 2019-08-23 | 上海工业自动化仪表研究院有限公司 | Power amplification circuit for magnetoelastic sensor |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180508 Termination date: 20190802 |
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| CF01 | Termination of patent right due to non-payment of annual fee |