CN209250582U - A kind of amplifying circuit for electronic equipment - Google Patents
A kind of amplifying circuit for electronic equipment Download PDFInfo
- Publication number
- CN209250582U CN209250582U CN201822152652.3U CN201822152652U CN209250582U CN 209250582 U CN209250582 U CN 209250582U CN 201822152652 U CN201822152652 U CN 201822152652U CN 209250582 U CN209250582 U CN 209250582U
- Authority
- CN
- China
- Prior art keywords
- resistance
- operational amplifier
- amplifying circuit
- capacitor
- input terminal
- 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 relates to a kind of amplifying circuits for electronic equipment, comprising: operational amplifier A1, operational amplifier A2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, capacitor C1, capacitor C2, capacitor C3 and capacitor C.The amplifying circuit of the utility model passes through two operational amplifiers of setting, wherein prime operational amplifier and rear class operational amplifier are each equipped with the feedback resistance for feedback, and realize low-pass filtering, and the amplifying circuit realizes the function of amplification, the performance of the amplifying circuit is stable and amplification factor is adjustable, is suitable for the higher electronic equipment of stability requirement.
Description
Technical field
The utility model relates to amplifying circuit technical fields, more particularly to a kind of amplifying circuit for electronic equipment.
Background technique
With the continuous improvement of scientific and technological level, the technology of electronic equipment is also constantly moving to maturity.With big number
According to the arriving in epoch, what people touched is electronic equipment and the information age that computer technology combines, this technicalization
The society of level height development bring people much it is convenient with it is quick, with the continuous improvement of social production level, electronic equipment
Have been widely used for a variety of aspects such as industry, science and technology, medical treatment and national defence.
In the big back that the mobile terminals such as electronic equipment rapid proliferation, especially smart phone, laptop flourish
It is also higher and higher to the performance requirement of electronic equipment under scape.
Wherein, amplifying circuit is that an essential part, the quality of amplifying circuit affect electronics in electronic equipment
The performance of equipment, therefore how to improve the stability of amplifying circuit, become the main aspect studied at present.
Utility model content
Therefore, to solve technological deficiency and deficiency of the existing technology, the utility model proposes one kind to set for electronics
Standby amplifying circuit.
Specifically, a kind of amplifying circuit for electronic equipment that the utility model one embodiment proposes: operation amplifier
Device A1, operational amplifier A2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, electricity
Hinder R9, resistance R10, resistance R11, resistance R12, capacitor C1, capacitor C2, capacitor C3 and capacitor C4, wherein
The resistance R1 is serially connected with the anti-phase input of the input terminal Vin1 and the operational amplifier A1 of the amplifying circuit
Between end, one end of the capacitor C1 is connected between the input terminal Vin1 of the amplifying circuit and the resistance R1, the other end
It is connected to ground terminal, the resistance R2 is serially connected with the reverse phase of the input terminal Vin2 and the operational amplifier A1 of the amplifying circuit
Between input terminal, one end of the capacitor C2 is connected between the input terminal Vin2 of the amplifying circuit and the resistance R2, separately
One end is connected to ground terminal, the resistance R3 be connected to the operational amplifier A1 inverting input terminal and the operational amplifier
Between the output end of A1, the resistance R4 is serially connected between the normal phase input end and ground terminal of the operational amplifier A1, described
The resistance R5 and capacitor C3 is connected to the non-inverting input terminal of the operational amplifier A1 and the output of the operational amplifier A1
Between end, the resistance R7 is serially connected with the output end of the operational amplifier A1 and the anti-phase input of the operational amplifier A2
Between end, one end of the resistance R6 is connected between the output end of the operational amplifier A1 and the resistance R7, the other end
It is connected to ground terminal, the resistance R9 is serially connected between the normal phase input end and ground terminal of the operational amplifier A2, the electricity
Resistance R8 is connected between the inverting input terminal of the operational amplifier A2 and the output end of the operational amplifier A2, the resistance
The R10 and capacitor C4 be connected to the operational amplifier A2 normal phase input end and the operational amplifier A2 output end it
Between, the resistance R12 is serially connected between the output end of the operational amplifier A2 and the output end vo ut of the amplifying circuit,
One end of the resistance R11 is connected between the output end of the operational amplifier A2 and the resistance R12, and the other end is connected to
Ground terminal.
The utility model embodiment has following advantage:
The amplifying circuit of the utility model is by two operational amplifiers of setting, and wherein prime operational amplifier and rear class are transported
It calculates amplifier and is each equipped with the feedback resistance for feedback, and realize low-pass filtering, and the amplifying circuit realizes amplification
The performance of function, the amplifying circuit is stable and amplification factor is adjustable, is suitable for the higher electronic equipment of stability requirement.
Through the following detailed description with reference to the accompanying drawings, the other aspects and feature of the utility model become obvious.But it answers
When knowing, which is only the purpose design explained, not as the restriction of the scope of the utility model, this is because its
It should refer to appended claims.It should also be noted that unless otherwise noted, it is not necessary to which scale attached drawing, they are only
Try hard to conceptually illustrate structure and process described herein.
Detailed description of the invention
Below in conjunction with attached drawing, specific embodiment of the present utility model is described in detail.
Fig. 1 is a kind of structural schematic diagram of amplifying circuit for electronic equipment provided by the embodiment of the utility model.
Specific embodiment
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing to this
The specific embodiment of utility model is described in detail.
It should be noted that it can be directly to separately when an element is considered as " connection " another element
One element may be simultaneously present centering elements.On the contrary, not deposited when element is connect referred to as " direct " with another element
In intermediary element.
2. referring to Figure 1, Fig. 1 is a kind of knot of amplifying circuit for electronic equipment provided by the embodiment of the utility model
Structure schematic diagram.The embodiments of the present invention provide a kind of amplifying circuit for electronic equipment, which includes: operation
Amplifier A1, operational amplifier A2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance
R8, resistance R9, resistance R10, resistance R11, resistance R12, capacitor C1, capacitor C2, capacitor C3 and capacitor C4, wherein
The resistance R1 is serially connected with the anti-phase input of the input terminal Vin1 and the operational amplifier A1 of the amplifying circuit
Between end, one end of the capacitor C1 is connected between the input terminal Vin1 of the amplifying circuit and the resistance R1, the other end
It is connected to ground terminal, the resistance R2 is serially connected with the reverse phase of the input terminal Vin2 and the operational amplifier A1 of the amplifying circuit
Between input terminal, one end of the capacitor C2 is connected between the input terminal Vin2 of the amplifying circuit and the resistance R2, separately
One end is connected to ground terminal, the resistance R3 be connected to the operational amplifier A1 inverting input terminal and the operational amplifier
Between the output end of A1, the resistance R4 is serially connected between the normal phase input end and ground terminal of the operational amplifier A1, described
The resistance R5 and capacitor C3 is connected to the non-inverting input terminal of the operational amplifier A1 and the output of the operational amplifier A1
Between end, the resistance R7 is serially connected with the output end of the operational amplifier A1 and the anti-phase input of the operational amplifier A2
Between end, one end of the resistance R6 is connected between the output end of the operational amplifier A1 and the resistance R7, the other end
It is connected to ground terminal, the resistance R9 is serially connected between the normal phase input end and ground terminal of the operational amplifier A2, the electricity
Resistance R8 is connected between the inverting input terminal of the operational amplifier A2 and the output end of the operational amplifier A2, the resistance
The R10 and capacitor C4 be connected to the operational amplifier A2 normal phase input end and the operational amplifier A2 output end it
Between, the resistance R12 is serially connected between the output end of the operational amplifier A2 and the output end vo ut of the amplifying circuit,
One end of the resistance R11 is connected between the output end of the operational amplifier A2 and the resistance R12, and the other end is connected to
Ground terminal.
Preferably, the model of operational amplifier A1 and operational amplifier A2 are LM224.
Specifically, for capacitor C1 and capacitor C2 for filtering, the inverting input terminal of operational amplifier A1 is connected to resistance
R1, resistance R2 and resistance R3, so that the electric current that the sum of the electric current of resistance R1 and the electric current of resistance R2 are equal to resistance R3 is flowed through, electricity
R4 is for dividing for resistance, and resistance R5 is feedback resistance, at feedback resistance both ends and meets capacitor C3 for filtering, low pass may be implemented
Filtering, therefore the size by changing resistance R5 is the amplification factor of changeable operational amplifier A1；Resistance R6 is transported for dividing
Calculate amplifier A2 inverting input terminal be short-circuited between resistance R7 and resistance R8, it may be considered that flow through resistance R6, resistance R7 and
The electric current of resistance R8 is equal, and for resistance R9 for dividing, resistance R10 is feedback resistance, at feedback resistance both ends and connects for filtering
Capacitor C4, may be implemented low-pass filtering, therefore the size by changing resistance R10 is the amplification of changeable operational amplifier A1
Multiple；And the output end of operational amplifier A2 connects resistance R11 and resistance R12, resistance R11 and resistance R12 are for dividing
Resistance, and by change resistance R11 and resistance R12 can change amplifying circuit output end vo ut output amplification factor.
Therefore by changing the value of resistance R5, resistance R10, resistance R11 and resistance R12, the times magnification of the amplifying circuit can be changed
Number, and exported by the output end vo ut of the amplifying circuit.
The amplifying circuit of the utility model embodiment by setting two operational amplifiers, wherein prime operational amplifier and
Rear class operational amplifier is each equipped with the feedback resistance for feedback, and realizes low-pass filtering, and the amplifying circuit realizes
The performance of the function of amplification, the amplifying circuit is stable and amplification factor is adjustable, is suitable for the higher electronic equipment of stability requirement.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement；And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The spirit and scope of scheme.
Claims (1)
1. a kind of amplifying circuit for electronic equipment characterized by comprising operational amplifier A1, operational amplifier A2, electricity
Hinder R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11,
Resistance R12, capacitor C1, capacitor C2, capacitor C3 and capacitor C4, wherein
The resistance R1 be serially connected with the input terminal Vin1 and the operational amplifier A1 of the amplifying circuit inverting input terminal it
Between, one end of the capacitor C1 is connected between the input terminal Vin1 of the amplifying circuit and the resistance R1, other end connection
In ground terminal, the resistance R2 is serially connected with the anti-phase input of the input terminal Vin2 and the operational amplifier A1 of the amplifying circuit
Between end, one end of the capacitor C2 is connected between the input terminal Vin2 of the amplifying circuit and the resistance R2, the other end
Be connected to ground terminal, the resistance R3 be connected to the operational amplifier A1 inverting input terminal and the operational amplifier A1
Between output end, the resistance R4 is serially connected between the normal phase input end and ground terminal of the operational amplifier A1, the resistance
The R5 and capacitor C3 be connected to the operational amplifier A1 non-inverting input terminal and the operational amplifier A1 output end it
Between, the resistance R7 be serially connected with the operational amplifier A1 output end and the operational amplifier A2 inverting input terminal it
Between, one end of the resistance R6 is connected between the output end of the operational amplifier A1 and the resistance R7, other end connection
In ground terminal, the resistance R9 is serially connected between the normal phase input end and ground terminal of the operational amplifier A2, the resistance R8
It is connected between the inverting input terminal of the operational amplifier A2 and the output end of the operational amplifier A2, the resistance R10
And the capacitor C4 is connected between the normal phase input end of the operational amplifier A2 and the output end of the operational amplifier A2,
The resistance R12 is serially connected between the output end of the operational amplifier A2 and the output end vo ut of the amplifying circuit, described
One end of resistance R11 is connected between the output end of the operational amplifier A2 and the resistance R12, and the other end is connected to ground connection
End.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822152652.3U CN209250582U (en) | 2018-12-20 | 2018-12-20 | A kind of amplifying circuit for electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822152652.3U CN209250582U (en) | 2018-12-20 | 2018-12-20 | A kind of amplifying circuit for electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209250582U true CN209250582U (en) | 2019-08-13 |
Family
ID=67533928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822152652.3U Expired - Fee Related CN209250582U (en) | 2018-12-20 | 2018-12-20 | A kind of amplifying circuit for electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209250582U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115389438A (en) * | 2022-10-26 | 2022-11-25 | 杭州泽天春来科技有限公司 | Spectrum appearance |
-
2018
- 2018-12-20 CN CN201822152652.3U patent/CN209250582U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115389438A (en) * | 2022-10-26 | 2022-11-25 | 杭州泽天春来科技有限公司 | Spectrum appearance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102769435A (en) | Differential amplifying circuit capable of automatically adjusting amplification factor | |
| CN104901674B (en) | Current-mode four-quadrant CMOS analog multiplication circuits | |
| CN209250582U (en) | A kind of amplifying circuit for electronic equipment | |
| CN107505971A (en) | A kind of LDO adjuster frequency compensation schemes for driving large current load | |
| US3918005A (en) | Operational amplifier circuitry with automatic self-biasing for enhanced voltage compliance | |
| CN204392204U (en) | A kind of ultra-weak electronic signal low-power consumption filter circuit | |
| CN114089803B (en) | Power detection circuit with temperature compensation function and radio frequency front end module thereof | |
| CN203933566U (en) | A kind of intelligent ultra-weak electronic signal 100Hz filter circuit | |
| CN104320105B (en) | A kind of mixed mode capacity multiplier circuit | |
| CN204119178U (en) | A kind of intelligent ultra-weak electronic signal low-power consumption filter circuit | |
| CN203933563U (en) | A kind of bioelectrical signals 50Hz filter circuit of hand-hold type | |
| CN105915197B (en) | A kind of active low-pass filter | |
| US10720892B1 (en) | Active wilkinson combiner | |
| CN103618509A (en) | Frequency compensation differential input amplifying circuit | |
| CN100466474C (en) | Voltage-current conversion circuit device | |
| US9837964B2 (en) | Amplifier system and device | |
| CN209375589U (en) | A kind of amplifying circuit | |
| CN104639085A (en) | Low-power filter circuit for weak electrical signals | |
| CN105450191A (en) | Dual-line silicon microphone amplifier | |
| CN111355457A (en) | Amplifying circuit for electronic equipment | |
| CN203632627U (en) | Difference signal amplification circuit | |
| CN208174644U (en) | A kind of number tunable capacitor circuit | |
| CN111355454A (en) | Amplifying circuit | |
| CN201797509U (en) | Circuit realizing summation of voltages | |
| CN206506503U (en) | The wave filter of mobile terminal data harvester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190813 Termination date: 20191220 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |