CN106656082A - Multistage amplifier circuit - Google Patents
Multistage amplifier circuit Download PDFInfo
- Publication number
- CN106656082A CN106656082A CN201611237234.3A CN201611237234A CN106656082A CN 106656082 A CN106656082 A CN 106656082A CN 201611237234 A CN201611237234 A CN 201611237234A CN 106656082 A CN106656082 A CN 106656082A
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- CN
- China
- Prior art keywords
- resistance
- electric capacity
- amplifier
- resistor
- capacitor
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- 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.)
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The invention provides a multistage amplifier circuit comprising a capacitor C1, a resistor R1, an operational amplifier U1, an operational amplifier U2, a capacitor C6, a resistor R2 and a resistor R3, wherein one end of the capacitor C1 is connected with an input signal Vi, the other end of the capacitor C1 is separately connected with the resistor R1 and a same-phase end of the operational amplifier U1, an inverter-phase end of the operational amplifier U1 is separately connected with the resistor R2, the resistor R3 and a capacitor C2, the other end of the capacitor C2 is separately connected with the other end of the resistor R3, the capacitor C6, a capacitor C3 and an output end of the operational amplifier U1, the other end of the capacitor C6 is separately connected with a resistor R6 and a capacitor C5, the inverter-phase end of the operational amplifier U1 is separately connected with a resistor R5 and the other end of the resistor R6, the other end of the resistor R5 is connected with a capacitor C4, the other end of the capacitor C5 is separately connected with an output end Vo and a resistor R7, and the other end of the resistor R7 is separately connected with the other end of the capacitor C4, the other end of the resistor R4, the other end of the resistor R2 and the other end of the resistor R1; and the input signal Vi can be an audio signal.
Description
Technical field
The present invention relates to a kind of amplifying circuit, specifically a kind of multistage amplifier circuit.
Background technology
Power amplifier abbreviation power amplifier, refers under the conditions of given distortion rate, can produce maximum power output negative to drive
The amplifier of load, application of the power amplifier in household electrical appliances, digital product serves pivotal role, has with our daily lifes
Substantial connection.
Power amplifier is the important component part in mobile phone wireless emitter, in the front stage circuits of mobile phone wireless emitter
In, the RF signal power very little produced by modulation oscillator circuit is needed through a series of amplification buffer stage, middle amplification
Level, final power amplifying stage, after obtaining enough radio-frequency powers, just can be fed on antenna it radiate, in order to obtain foot
Enough big radio frequency power outputs, it is necessary to adopt power amplification circuit.
At present people are for the research focus of communication equipment are all in miniaturization, for each composition portion in communication transmitter
Dividing carries out simplifying optimization and keeps higher stability to be the emphasis studied in industry.
The content of the invention
It is an object of the invention to provide a kind of multistage amplifier circuit, to solve the problems, such as above-mentioned background technology in propose.
For achieving the above object, the present invention provides following technical scheme：
A kind of multistage amplifier circuit, including electric capacity C1, resistance R1, amplifier U1, amplifier U2, electric capacity C6, resistance R2 and resistance
R3, it is characterised in that described electric capacity C1 one end connects input signal Vi, the electric capacity C1 other ends connect respectively resistance R1 and amplifier U1
In-phase end, amplifier U1 end of oppisite phase connects respectively resistance R2, resistance R3 and electric capacity C2, and it is another that the electric capacity C2 other ends connect respectively resistance R3
One end, electric capacity C6, electric capacity C3 and amplifier U1 output end, the electric capacity C6 other ends connect respectively resistance R6 and electric capacity C5, and amplifier U2 is anti-
Phase end connects respectively resistance R5 and the resistance R6 other ends, resistance R5 other ends connection electric capacity C4, the electric capacity C5 other ends difference
It is another that connection output end vo and resistance R7, the resistance R7 other end connect respectively the electric capacity C4 other ends, the resistance R4 other ends, resistance R2
End and the resistance R1 other ends；Input signal Vi can be audio signal.
Compared with prior art, the invention has the beneficial effects as follows：Multistage amplifier circuit of the present invention, is tied using basic amplifier
Structure is designed, and the peripheral electron element of two-stage amplifying circuit is optimized, and effectively improves the quality of output signal, low cost, body
Product is little, applied widely.
Description of the drawings
Fig. 1 is the circuit diagram of multistage amplifier circuit.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1 is referred to, in the embodiment of the present invention, a kind of multistage amplifier circuit, including electric capacity C1, resistance R1, amplifier U1, fortune
U2, electric capacity C6, resistance R2 and resistance R3 are put, described electric capacity C1 one end connects input signal Vi, and the electric capacity C1 other ends connect respectively
Resistance R1 and amplifier U1 in-phase end, amplifier U1 end of oppisite phase connects respectively resistance R2, resistance R3 and electric capacity C2, the electric capacity C2 other ends point
Not Lian Jie the resistance R3 other ends, electric capacity C6, electric capacity C3 and amplifier U1 output end, the electric capacity C6 other ends connect respectively resistance R6 and electricity
Hold C5, amplifier U2 end of oppisite phase connects respectively resistance R5 and the resistance R6 other ends, resistance R5 other ends connection electric capacity C4, the electric capacity
The C5 other ends connect respectively output end vo and resistance R7, and it is another that the resistance R7 other ends connect respectively the electric capacity C4 other ends, resistance R4
End, the resistance R2 other ends and the resistance R1 other ends；Input signal Vi can be audio signal.
Fig. 1 is referred to, the gain of the first order pre-amplification circuit of amplifier U1 composition is：1+R3/R2, is negative-feedback homophase
Amplifying circuit, is using the impedance operator of RC parallel circuits, making an uproar high frequency on the basis of R3 again and a upper small capacitances C2
Sound is filtered out, and prevents the first order that noise enters amplifying circuit to be exaggerated, and on output result impact is produced.The second level adopts amplifier
U2's is equally homophase negative feedback amplifier circuit, wherein the bulky capacitor C4 that connected on the R5 of negative-feedback end, in order to
Make circuit have a more preferable amplification to low frequency signal, improve the signal quality of output.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of spirit or essential attributes without departing substantially from the present invention, the present invention can be in other specific forms realized.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as and limit involved claim.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity those skilled in the art should
Using specification as an entirety, the technical scheme in each embodiment can also Jing it is appropriately combined, form those skilled in the art
Understandable other embodiment.
Claims (1)
1. a kind of multistage amplifier circuit, including electric capacity C1, resistance R1, amplifier U1, amplifier U2, electric capacity C6, resistance R2 and resistance R3,
Characterized in that, described electric capacity C1 one end connects input signal Vi, the electric capacity C1 other ends connect resistance R1 respectively and amplifier U1 is same
Xiang Duan, amplifier U1 end of oppisite phase connects respectively resistance R2, resistance R3 and electric capacity C2, and it is another that the electric capacity C2 other ends connect respectively resistance R3
End, electric capacity C6, electric capacity C3 and amplifier U1 output end, the electric capacity C6 other ends connect respectively resistance R6 and electric capacity C5, and amplifier U2 is anti-phase
End connects respectively resistance R5 and the resistance R6 other ends, and resistance R5 other ends connection electric capacity C4, the electric capacity C5 other ends connect respectively
Output end vo and resistance R7 are met, the resistance R7 other ends connect respectively the electric capacity C4 other ends, the resistance R4 other ends, the resistance R2 other ends
With the resistance R1 other ends；Input signal Vi can be audio signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611237234.3A CN106656082A (en) | 2016-12-28 | 2016-12-28 | Multistage amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611237234.3A CN106656082A (en) | 2016-12-28 | 2016-12-28 | Multistage amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106656082A true CN106656082A (en) | 2017-05-10 |
Family
ID=58831940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611237234.3A Pending CN106656082A (en) | 2016-12-28 | 2016-12-28 | Multistage amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106656082A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109120234A (en) * | 2018-07-26 | 2019-01-01 | 曹政新 | A kind of new power amplifying circuit |
| CN110365207A (en) * | 2018-04-10 | 2019-10-22 | 中芯国际集成电路制造(上海)有限公司 | Amplifying circuit |
-
2016
- 2016-12-28 CN CN201611237234.3A patent/CN106656082A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110365207A (en) * | 2018-04-10 | 2019-10-22 | 中芯国际集成电路制造(上海)有限公司 | Amplifying circuit |
| CN110365207B (en) * | 2018-04-10 | 2020-10-09 | 中芯国际集成电路制造(上海)有限公司 | Amplifying circuit |
| CN109120234A (en) * | 2018-07-26 | 2019-01-01 | 曹政新 | A kind of new power amplifying circuit |
| CN109120234B (en) * | 2018-07-26 | 2023-04-07 | 曹政新 | Novel power amplification circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170510 |