CN205725664U - A kind of low frequency signal amplifying circuit - Google Patents
A kind of low frequency signal amplifying circuit Download PDFInfo
- Publication number
- CN205725664U CN205725664U CN201620263809.8U CN201620263809U CN205725664U CN 205725664 U CN205725664 U CN 205725664U CN 201620263809 U CN201620263809 U CN 201620263809U CN 205725664 U CN205725664 U CN 205725664U
- Authority
- CN
- China
- Prior art keywords
- resistance
- connects
- electric capacity
- diode
- effect transistor
- 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 kind of low frequency signal amplifying circuit, including electric capacity C1, diode D2, field-effect transistor V1 and transistor V2, one end of described electric capacity C1 connects signal input part IN, the other end of electric capacity C1 connects resistance R1 and electric capacity C2, the other end of electric capacity C2 connects the other end of resistance R1, resistance R2, the negative electrode of diode D1 and the anode of diode D2, and the negative electrode of diode D2 connects resistance R3 and field-effect transistor V1 drain electrode.This utility model low frequency signal amplification circuit structure is simple, components and parts are few; circuit has abandoned the chip controls structure of complexity; operating characteristic merely with audion and field-effect transistor is made; abandon and there is overvoltage protection and the adjustable function of amplification, therefore there is low cost, diverse in function and advantage easy to use.
Description
Technical field
This utility model relates to a kind of amplifying circuit, specifically a kind of low frequency signal amplifying circuit.
Background technology
After entering 21 century, various portable electronic equipments become a kind of important development trend of electronic equipment.From the mobile phone as means of communication, to the MP3 player as amusement equipment, have become as the portable electric appts that almost everybody possesses.That will popularize successively also has portable television, portable DVD player etc..One common ground of all these portable electronic equipments, it is simply that have signal to export, has namely been required for a signal amplifier, the most structure of existing frequently-used amplifier circuit for sound frequency signal is complicated, and volume is big, less stable, it is easily subject to the damage of overvoltage, therefore needs to be improved.
Utility model content
The purpose of this utility model is to provide a kind of low frequency signal amplifying circuit, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the following technical scheme of this utility model offer:
nullA kind of low frequency signal amplifying circuit，Including electric capacity C1、Diode D2、Field-effect transistor V1 and transistor V2，One end of described electric capacity C1 connects signal input part IN，The other end of electric capacity C1 connects resistance R1 and electric capacity C2，The other end of electric capacity C2 connects the other end of resistance R1、Resistance R2、The negative electrode of diode D1 and the anode of diode D2，The negative electrode of diode D2 connects resistance R3 and field-effect transistor V1 drain electrode，The other end of resistance R3 connects resistance R4 and power supply VCC，The anode of diode D1 connects resistance R6、Potentiometer RP1 and electric capacity C3，The other end of resistance R2 connects the grid of field-effect transistor V1，The source electrode of field-effect transistor V1 connects the anode of diode D3，The negative electrode of diode D3 connects resistance R5 and the other end of resistance R6，The base stage of the other end connecting triode V2 of resistance R5，The emitter stage of audion V2 connects resistance R2 and resistance R7，The other end of resistance R7 connects the other end of potentiometer RP1，The other end of resistance R2 connects the other end of electric capacity C3，The colelctor electrode of audion V2 connects the other end and the outfan OUT of resistance R4.
As preferred version of the present utility model: described electric capacity C3 is tunable capacitor.
Compared with prior art; the beneficial effects of the utility model are: this utility model low frequency signal amplification circuit structure is simple, components and parts are few; circuit has abandoned the chip controls structure of complexity; operating characteristic merely with audion and field-effect transistor is made; abandon and there is overvoltage protection and the adjustable function of amplification, therefore there is low cost, diverse in function and advantage easy to use.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of low frequency signal amplifying circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
nullRefer to Fig. 1，A kind of low frequency signal amplifying circuit，Including electric capacity C1、Diode D2、Field-effect transistor V1 and transistor V2，One end of described electric capacity C1 connects signal input part IN，The other end of electric capacity C1 connects resistance R1 and electric capacity C2，The other end of electric capacity C2 connects the other end of resistance R1、Resistance R2、The negative electrode of diode D1 and the anode of diode D2，The negative electrode of diode D2 connects resistance R3 and field-effect transistor V1 drain electrode，The other end of resistance R3 connects resistance R4 and power supply VCC，The anode of diode D1 connects resistance R6、Potentiometer RP1 and electric capacity C3，The other end of resistance R2 connects the grid of field-effect transistor V1，The source electrode of field-effect transistor V1 connects the anode of diode D3，The negative electrode of diode D3 connects resistance R5 and the other end of resistance R6，The base stage of the other end connecting triode V2 of resistance R5，The emitter stage of audion V2 connects resistance R2 and resistance R7，The other end of resistance R7 connects the other end of potentiometer RP1，The other end of resistance R2 connects the other end of electric capacity C3，The colelctor electrode of audion V2 connects the other end and the outfan OUT of resistance R4.
As preferred version of the present utility model: described electric capacity C3 is tunable capacitor.
Operation principle of the present utility model is: usually need to amplify input signal in oscillograph sum word table.This circuit is by using field-effect transistor to make input have high-ohmic, input signal to enter circuit from IN, and its input seals in RC circuit and two protections diode D1, D2, is used for preventing overvoltage.Diode D3 is for reducing the base potential of the low-frequency transistor V2 being followed by.Resistance R6 is the operating resistance of source follower.The value of regulator potentiometer RP1 and electric capacity C3 can change amplification coefficient, and the signal after amplification is exported by outfan OUT.Circuit structure is simple, components and parts are few; circuit has abandoned the chip controls structure of complexity; operating characteristic merely with audion and field-effect transistor is made, and abandons and has overvoltage protection and the adjustable function of amplification, therefore has low cost, diverse in function and advantage easy to use.
Claims (2)
- null1. a low frequency signal amplifying circuit，Including electric capacity C1、Diode D2、Field-effect transistor V1 and transistor V2，It is characterized in that，One end of described electric capacity C1 connects signal input part IN，The other end of electric capacity C1 connects resistance R1 and electric capacity C2，The other end of electric capacity C2 connects the other end of resistance R1、Resistance R2、The negative electrode of diode D1 and the anode of diode D2，The negative electrode of diode D2 connects resistance R3 and field-effect transistor V1 drain electrode，The other end of resistance R3 connects resistance R4 and power supply VCC，The anode of diode D1 connects resistance R6、Potentiometer RP1 and electric capacity C3，The other end of resistance R2 connects the grid of field-effect transistor V1，The source electrode of field-effect transistor V1 connects the anode of diode D3，The negative electrode of diode D3 connects resistance R5 and the other end of resistance R6，The base stage of the other end connecting triode V2 of resistance R5，The emitter stage of audion V2 connects resistance R2 and resistance R7，The other end of resistance R7 connects the other end of potentiometer RP1，The other end of resistance R2 connects the other end of electric capacity C3，The colelctor electrode of audion V2 connects the other end and the outfan OUT of resistance R4.
- A kind of low frequency signal amplifying circuit the most according to claim 1, it is characterised in that described electric capacity C3 is tunable capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620263809.8U CN205725664U (en) | 2016-04-01 | 2016-04-01 | A kind of low frequency signal amplifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620263809.8U CN205725664U (en) | 2016-04-01 | 2016-04-01 | A kind of low frequency signal amplifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205725664U true CN205725664U (en) | 2016-11-23 |
Family
ID=57312159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620263809.8U Expired - Fee Related CN205725664U (en) | 2016-04-01 | 2016-04-01 | A kind of low frequency signal amplifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205725664U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106912007A (en) * | 2017-04-25 | 2017-06-30 | 淮阴师范学院 | A kind of data collecting system based on wireless sensor network |
| CN108107170A (en) * | 2017-11-30 | 2018-06-01 | 湖州欣格膜科技有限公司 | A kind of open air sewage dynamic monitoring early warning system |
| CN108418558A (en) * | 2017-02-09 | 2018-08-17 | 株式会社村田制作所 | Power amplification circuit and high-frequency model |
| CN109120254A (en) * | 2018-10-09 | 2019-01-01 | 华北电力大学（保定） | A kind of switching value input circuit |
-
2016
- 2016-04-01 CN CN201620263809.8U patent/CN205725664U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418558A (en) * | 2017-02-09 | 2018-08-17 | 株式会社村田制作所 | Power amplification circuit and high-frequency model |
| CN106912007A (en) * | 2017-04-25 | 2017-06-30 | 淮阴师范学院 | A kind of data collecting system based on wireless sensor network |
| CN108107170A (en) * | 2017-11-30 | 2018-06-01 | 湖州欣格膜科技有限公司 | A kind of open air sewage dynamic monitoring early warning system |
| CN109120254A (en) * | 2018-10-09 | 2019-01-01 | 华北电力大学（保定） | A kind of switching value input circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205725664U (en) | A kind of low frequency signal amplifying circuit | |
| IN2014DN05942A (en) | ||
| CN103974171A (en) | Plosive cancelling circuit | |
| CN203933898U (en) | A kind of VGA CARD is eliminated circuit and active noise reduction earphone | |
| CN205265633U (en) | Anti interfering signal magnification system | |
| CN104320091A (en) | Power amplifying circuit for computer speaker | |
| CN205566235U (en) | Sound sound signal amplification control circuit | |
| CN204334499U (en) | A kind of audio-frequency amplifier circuit | |
| CN205430183U (en) | Intercom audio power amplifier circuit | |
| CN203912161U (en) | Noise eliminating circuit | |
| CN203984359U (en) | A kind of onboard audio power amplification circuit | |
| CN104300926A (en) | Audio power amplifier used for multimedia electronic equipment | |
| Shukla et al. | A new circuit model of small-signal sziklai pair amplifier | |
| CN203151435U (en) | Audio input control and power amplification circuit | |
| CN203120140U (en) | Audio amplification circuit with standby function | |
| CN205265638U (en) | Audio signal magnification system | |
| CN218277040U (en) | Gain change noise reduction circuit for capacitor sound head microphone | |
| CN104936095A (en) | Audio processing system based on triode common-emitter symmetric amplification circuit | |
| CN203180854U (en) | High-fidelity power amplifier | |
| CN204013410U (en) | A kind of computer broadband signal amplifier | |
| CN204206116U (en) | A kind of audio-frequency power amplifier for multimedia electronic equipment | |
| CN203180831U (en) | Front stereophonic amplifier | |
| CN203206450U (en) | Stereo hi-fi transistor push-pull sound amplifier | |
| CN204650995U (en) | A kind of home entertaining all-in-one | |
| CN103475323A (en) | Power amplifier |
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: 20161123 Termination date: 20170401 |