CN206195732U - Novel quiescent current's control circuit is put to fortune - Google Patents
Novel quiescent current's control circuit is put to fortune Download PDFInfo
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- CN206195732U CN206195732U CN201621292590.0U CN201621292590U CN206195732U CN 206195732 U CN206195732 U CN 206195732U CN 201621292590 U CN201621292590 U CN 201621292590U CN 206195732 U CN206195732 U CN 206195732U
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Abstract
The utility model relates to a novel quiescent current's control circuit is put to fortune, put IC, negative feedback network and constant -current source circuit including fortune, the both ends of negative feedback network are connected respectively on IC was put to fortune audio frequency inverting input end and audio output, and IC's positive supply end is put to fortune or the negative supply is held and audio output between be equipped with the constant -current source circuit. Like this, this control circuit can change fortune and put the inside static work electric current of IC, can obtain different distortion signal spectrum characteristics to realize the performance of various tone qualities, satisfy the demand of various audio frequency products in the aspect of the tone quality is diversified and individualized, be favorable to the differentiation development of product.
Description
Technical field
The utility model belongs to audio frequency apparatus technical field, the control electricity of more particularly to a kind of new amplifier quiescent current
Road.
Background technology
At present, audio product gradually develops to miniaturization lightweight direction on the market, and interiors of products space is more and more compacter,
Integrated operational amplification circuit (hereinafter referred to as amplifier IC) progressively instead of traditional discrete component audio amplifier circuit.
Amplifier IC is almost designed to quiescent current, the quiescent current be all immobilize, unadjustable state, user
The quiescent current for changing its internal amplification circuit cannot be adjusted outside IC, so that the tone color performance of amplifier IC is also fixed,
Demand of the various audio products in terms of tone color variation and personalization cannot be met.
But often amplifier IC needs to be applied to various application scenarios, since it is considered that portable and miniaturized products are in power consumption side
The requirement in face, its internal stationary current design must also result in its distorted signal spectrum based on odd harmonic distortion than relatively low,
Performance in subjective sense of hearing is colder partially hard tone color, and sound appeal is not enough, and overall sense of hearing is generally inferior to by discrete component
The conventional audio amplifying circuit built.
Utility model content
In order to solve above-mentioned technical problem present in prior art, the utility model can change amplifier IC there is provided one kind
Internal static working current, to obtain different distorted signal spectrum features, realizes various tone color performances, meets various audios
The control circuit of the new amplifier quiescent current of demand of the product in terms of tone color variation and personalization.
In order to solve the above technical problems, the utility model is adopted the following technical scheme that：
A kind of control circuit of new amplifier quiescent current, includes amplifier IC, negative feedback network and constant-current source circuit, institute
The two ends for stating negative feedback network are connected on the audio inverting input and audio output of amplifier IC, and amplifier IC is just
The constant-current source circuit is provided between power end or negative power end and audio output.
Further, the constant-current source circuit is through the pole of output three inside the audio output pin and amplifier IC of amplifier IC
Pipe or FET Q2 connections, and electric current is inculcated give FET Q2；
Or, the constant-current source circuit through the output triode inside audio output pin and the amplifier IC of amplifier IC or
FET Q1 is connected, and from FET Q1 current drawns.
The beneficial effects of the utility model：
The utility model is by using above-mentioned technical proposal, you can change the static working current inside amplifier IC, can be with
Obtain different distorted signal spectrum features, to realize that various tone colors are showed, meet various audio products in tone color variation and
Demand in terms of personalization, is conducive to the differentiation of product to develop.
Brief description of the drawings
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings：
Fig. 1 is that the structural principle of the control circuit embodiments one of new amplifier quiescent current described in the utility model is illustrated
Figure；
Fig. 2 is that the structural principle of the control circuit embodiments two of new amplifier quiescent current described in the utility model is illustrated
Figure.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and implementation
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only used to explain this
Utility model, is not used to limit the utility model.
Embodiment one：
As shown in fig. 1, the utility model embodiment one provides a kind of control circuit of new amplifier quiescent current, bag
Amplifier IC 1, negative feedback network 2 and constant-current source circuit 3 are included, the two ends of the negative feedback network 2 are connected to amplifier IC 1
Audio inverting input and audio output on, and between the positive power source terminal and audio output of amplifier IC 1 be provided with constant-current source
Circuit 3.Wherein, the constant-current source circuit 3 is through the pole of output three inside the audio output pin and amplifier IC 1 of amplifier IC 1
Pipe or FET Q2 connections, and electric current is inculcated give FET Q2.
When the control circuit of new amplifier quiescent current described in the utility model embodiment one works, in negative feedback network 2
In the presence of, the offset voltage of the audio outputs of amplifier IC 1 may remain in 0V or so, and now constant-current source circuit 3 passes through amplifier
Output triode or FET Q2 inside the audio output pin connection of IC 1, and electric current is inculcated to FET
Q2, the current value of implantation is I2, increases its quiescent current, and value added is equal to I2, i.e.,：The static working current I0 of amplifier IC 1
=I1+I2, I1 are constant.
So, the control circuit of new amplifier quiescent current can change in amplifier IC 1 described in the utility model embodiment one
The static working current in portion (makes output offset voltage without departing from use requirement, so that amplifier by outside negative feedback network 2
The static working current of current amplifier stage (i.e. output stage) triode or FET inside IC 1 is improved, and changes constant current
The current value of source circuit 3 can change the value added of the static working current inside amplifier IC 1.), change its distorted signal frequently
Spectrum signature, so that changing the performance of its tone color (by setting different quiescent currents, can obtain different distorted signal spectrums special
Levy, to realize that various tone colors are showed), to meet demand of the various audio products in terms of tone color variation and personalization, favorably
Develop in the differentiation of product.
Embodiment two：
As shown in Figure 2, the utility model embodiment two provides a kind of control circuit of new amplifier quiescent current, its
Structure is essentially identical with embodiment one, includes amplifier IC 1, negative feedback network 2 and constant-current source circuit 3, the negative feedback network
2 two ends are connected on the audio inverting input and audio output of amplifier IC 1.It is differed only in, the constant current
Source circuit 3 through the output triode or FET Q1 inside the audio output pin connection of amplifier IC 1, and from field-effect
Pipe Q1 current drawns, if current drawn value is I2, increase its quiescent current, and value added is equal to I2, i.e.,：I1=I0+I2, I0 are not
Become.
Similarly, the control circuit of new amplifier quiescent current can also change amplifier IC described in the utility model embodiment two
Static working current inside 1, changes its distorted signal spectrum feature, so that change the performance of its tone color, to meet various audios
Demand of the product in terms of tone color variation and personalization, is conducive to the differentiation of product to develop.
The above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and moisten
Decorations are also considered as protection domain of the present utility model.
Claims (3)
1. a kind of control circuit of new amplifier quiescent current, it is characterised in that：Include amplifier IC (1), negative feedback network (2)
With constant-current source circuit (3), the two ends of the negative feedback network (2) be connected to amplifier IC (1) audio inverting input and
The constant-current source electricity is provided with audio output, and between the positive power source terminal or negative power end and audio output of amplifier IC (1)
Road (3).
2. the control circuit of new amplifier quiescent current according to claim 1, it is characterised in that：The constant-current source circuit
(3) it is connected through the audio output pin of amplifier IC (1) output triode internal with amplifier IC (1) or FET Q2, and
Electric current is inculcated and gives FET Q2.
3. the control circuit of new amplifier quiescent current according to claim 1, it is characterised in that：The constant-current source circuit
(3) it is connected through the audio output pin of amplifier IC (1) output triode internal with amplifier IC (1) or FET Q1, and
From FET Q1 current drawns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621292590.0U CN206195732U (en) | 2016-11-29 | 2016-11-29 | Novel quiescent current's control circuit is put to fortune |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621292590.0U CN206195732U (en) | 2016-11-29 | 2016-11-29 | Novel quiescent current's control circuit is put to fortune |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206195732U true CN206195732U (en) | 2017-05-24 |
Family
ID=58724176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621292590.0U Active CN206195732U (en) | 2016-11-29 | 2016-11-29 | Novel quiescent current's control circuit is put to fortune |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206195732U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107920308A (en) * | 2017-12-21 | 2018-04-17 | 珠海斯巴克电子设备有限公司 | A kind of amplifier IC and electron tube mixed audio output circuit |
-
2016
- 2016-11-29 CN CN201621292590.0U patent/CN206195732U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107920308A (en) * | 2017-12-21 | 2018-04-17 | 珠海斯巴克电子设备有限公司 | A kind of amplifier IC and electron tube mixed audio output circuit |
| CN107920308B (en) * | 2017-12-21 | 2024-03-12 | 珠海斯巴克电子设备有限公司 | Mixed audio output circuit of operational amplifier IC and valve |
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