CN205847428U - A kind of video signal transmission circuit of improvement - Google Patents
A kind of video signal transmission circuit of improvement Download PDFInfo
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- CN205847428U CN205847428U CN201620573014.7U CN201620573014U CN205847428U CN 205847428 U CN205847428 U CN 205847428U CN 201620573014 U CN201620573014 U CN 201620573014U CN 205847428 U CN205847428 U CN 205847428U
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- resistance
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- amplifier
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- base stage
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Abstract
The utility model discloses the video signal transmission circuit of a kind of improvement, signal input part is connected to the base stage of the first audion by the first electric capacity, the base stage of the first audion passes through the first resistance and the second capacity earth, the base stage of the first audion is connected to high level by the second resistance, the colelctor electrode of the first audion is connected to high level by the 3rd resistance, the colelctor electrode of the second audion is connected to high level by the 4th resistance, the emitter stage of the second audion is connected to the emitter stage of the first audion, the colelctor electrode of the 3rd audion is connected to high level by the 5th resistance, the base stage of the 3rd audion is connected to the colelctor electrode of the second audion, 3rd transistor emitter is by the diode connected and the 6th resistance eutral grounding, the base stage of the second audion is connected between diode and the 6th resistance.This utility model can improve the deficiencies in the prior art, reduces the amplifying circuit impact for video signal.
Description
Technical field
This utility model relates to transmission of video processing technology field, the video signal transmission circuit of a kind of improvement.
Background technology
Video monitoring is the important component part of safety and protection system, including front-end camera, transmission cable, video monitoring
Platform, video monitoring is directly perceived with it, accurate, abundant with information content in time and is widely used in many occasions.Along with computer,
Network and image procossing, the developing rapidly of transmission technology, the development that Video Supervision Technique is at full speed, but great majority regard now
The signal transmission of frequency monitoring still uses wire transmission, arranges complexity, easily because various factors makes transmission line damage
Bad, make video monitoring quality reduce.Chinese utility model patent CN 203492140 U discloses the transmitting of a kind of video image
Circuit, improves the quality of video image in the case of normal transmission.But, the signal of the transmission circuit of this video image amplifies
Coefficient is relatively big by external interference fluctuation, causes in the case of using environment more severe, and the quality of video image is the best.
Summary of the invention
The technical problems to be solved in the utility model is to provide the video signal transmission circuit of a kind of improvement, it is possible to solve existing
There is the deficiency of technology, reduce the amplifying circuit impact for video signal.
For solving above-mentioned technical problem, technical solution adopted in the utility model is as follows.
The video signal transmission circuit of a kind of improvement, signal input part is connected to the base of the first audion by the first electric capacity
Pole, the base stage of the first audion is by the first resistance and the second capacity earth, and the base stage of the first audion is by the second resistance even
Being connected to high level, the colelctor electrode of the first audion is connected to high level by the 3rd resistance, and the colelctor electrode of the second audion passes through
4th resistance is connected to high level, and the emitter stage of the second audion is connected to the emitter stage of the first audion, the 3rd audion
Colelctor electrode is connected to high level by the 5th resistance, and the base stage of the 3rd audion is connected to the colelctor electrode of the second audion, and the 3rd
Transistor emitter is by the diode connected and the 6th resistance eutral grounding, and the base stage of the second audion is connected to diode and the 6th
Between resistance, the emitter stage of the first audion is connected to the first fortune by the 7th resistance, the 8th resistance and the 3rd electric capacity of series connection
The normal phase input end put, the inverting input of the first amplifier passes through the 9th resistance eutral grounding, and the inverting input of the first amplifier passes through
Tenth resistance is connected to the outfan of the first amplifier, by the 4th capacity earth between the 7th resistance and the 8th resistance, and the 8th electricity
It is connected to the outfan of the first amplifier, the first amplifier by the 5th electric capacity connected and the 11st resistance between resistance and the 3rd electric capacity
Outfan be connected to signal output part by the 12nd resistance, the normal phase input end of the first amplifier is connect by the 13rd resistance
Ground.
What employing technique scheme was brought has the beneficial effects that: this utility model uses the first audion and the two or three
Pole pipe composition total radio amplifier, by the 3rd audion for the feedback control of the second audion, it is achieved penetrate amplification for public affairs
The dynamic regulation of circuit amplification coefficient.First amplifier is used for carrying out the video signal after total radio amplifier amplifies
Filter, it addition, the prime input signal of amplifying circuit and rear class output signal can be carried out tentatively by the second electric capacity and the 3rd electric capacity
Filter, improve the quality of video signal output further.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of one detailed description of the invention of this utility model.
In figure: IN, signal input part；OUT, signal output part；Q1, the first audion；Q2, the second audion；Q3, the 3rd
Audion；R1, the first resistance；R2, the second resistance；R3, the 3rd resistance；R4, the 4th resistance；R5, the 5th resistance；R6, the 6th electricity
Resistance；R7, the 7th resistance；R8, the 8th resistance；R9, the 9th resistance；R10, the tenth resistance；R11, the 11st resistance；R12, the 12nd
Resistance；R13, the 13rd resistance；C1, the first electric capacity；C2, the second electric capacity；C3, the 3rd electric capacity；C4, the 4th electric capacity；C5, the 5th electricity
Hold；A1, the first amplifier；D, diode, VCC, high level.
Detailed description of the invention
The standardized element used in this utility model all can commercially, and shaped piece is according to description and attached
The record of figure all can carry out customized, the concrete connected mode of each part all use in prior art ripe bolt, rivet,
The conventional meanses such as welding, stickup, are not described in detail in this.
It is connected to the by the first electric capacity C1 with reference to Fig. 1, the signal input part IN of one detailed description of the invention of utility model
The base stage of one audion Q1, the base stage of the first audion Q1 passes through the first resistance R1 and the second electric capacity C2 ground connection, the first audion
The base stage of Q1 is connected to high level VCC by the second resistance R2, and the colelctor electrode of the first audion Q1 is connected by the 3rd resistance R3
To high level VCC, the colelctor electrode of the second audion Q2 is connected to high level VCC by the 4th resistance R4, the second audion Q2's
Emitter stage is connected to the emitter stage of the first audion Q1, and the colelctor electrode of the 3rd audion Q3 connects paramount electricity by the 5th resistance R5
Flat VCC, the base stage of the 3rd audion Q3 is connected to the colelctor electrode of the second audion Q2, and the 3rd audion Q3 emitter stage is by series connection
Diode D and the 6th resistance R6 ground connection, the base stage of the second audion Q2 is connected between diode D and the 6th resistance R6,
The emitter stage of one audion Q1 is connected to the first amplifier A1 by the 7th resistance R7, the 8th resistance R8 and the 3rd electric capacity C3 of series connection
Normal phase input end, the inverting input of the first amplifier A1 pass through the 9th resistance R9 ground connection, the inverting input of the first amplifier A1
The outfan of the first amplifier A1 it is connected to, by the 4th electricity between the 7th resistance R7 and the 8th resistance R8 by the tenth resistance R10
Hold C4 ground connection, be connected to by the 5th electric capacity C5 and the 11st resistance R11 of series connection between the 8th resistance R8 and the 3rd electric capacity C3
The outfan of the first amplifier A1, the outfan of the first amplifier A1 is connected to signal output part OUT by the 12nd resistance R12, the
The normal phase input end of one amplifier A1 passes through the 13rd resistance R13 ground connection.
Wherein, the first resistance R1 be 65k Ω, the second resistance R2 be 70k Ω, the 3rd resistance be 135k Ω, the 4th resistance R4
For 40k Ω, the 5th resistance R5 be 80k Ω, the 6th resistance R6 be 230k Ω, the 7th resistance R7 be 25k Ω, the 8th resistance R8 be
90k Ω, the 9th resistance R9 are 105k Ω, the tenth resistance R10 is 55k Ω, and the 11st resistance R11 is 30k Ω, the 12nd resistance
R12 is 70k Ω, and the 13rd resistance R13 is 110k Ω.First electric capacity C1 is 155 μ F, the second electric capacity C2 is 220 μ F, the 3rd electric capacity
C3 be 110 μ F, the 4th electric capacity C4 be 320 μ F, the 5th electric capacity C5 be 70 μ F.
Of the present utility model ultimate principle and principal character and of the present utility model advantage have more than been shown and described.One's own profession
Skilled person will appreciate that of industry, this utility model is not restricted to the described embodiments, described in above-described embodiment and description
Principle of the present utility model is simply described, on the premise of without departing from this utility model spirit and scope, this utility model is also
Have various changes and modifications, in the range of these changes and improvements both fall within claimed this utility model.This utility model
Claimed scope is defined by appending claims and equivalent thereof.
Claims (1)
1. the video signal transmission circuit improved, it is characterised in that: signal input part (IN) is by the first electric capacity (C1) even
Being connected to the base stage of the first audion (Q1), the base stage of the first audion (Q1) is connect by the first resistance (R1) and the second electric capacity (C2)
Ground, the base stage of the first audion (Q1) is connected to high level (VCC), the current collection of the first audion (Q1) by the second resistance (R2)
Pole is connected to high level (VCC) by the 3rd resistance (R3), and the colelctor electrode of the second audion (Q2) is by the 4th resistance (R4) even
Being connected to high level (VCC), the emitter stage of the second audion (Q2) is connected to the emitter stage of the first audion (Q1), the 3rd audion
(Q3) colelctor electrode is connected to high level (VCC) by the 5th resistance (R5), and the base stage of the 3rd audion (Q3) is connected to second
The colelctor electrode of audion (Q2), the 3rd audion (Q3) emitter stage passes through diode (D) and the 6th resistance (R6) ground connection of series connection,
The base stage of the second audion (Q2) is connected between diode (D) and the 6th resistance (R6), the emitter stage of the first audion (Q1)
The positive being connected to the first amplifier (A1) by the 7th resistance (R7), the 8th resistance (R8) and the 3rd electric capacity (C3) of series connection is inputted
End, the inverting input of the first amplifier (A1) passes through the 9th resistance (R9) ground connection, and the inverting input of the first amplifier (A1) passes through
Tenth resistance (R10) is connected to the outfan of the first amplifier (A1), by the between the 7th resistance (R7) and the 8th resistance (R8)
Four electric capacity (C4) ground connection, by the 5th electric capacity (C5) and the 11st electricity of series connection between the 8th resistance (R8) and the 3rd electric capacity (C3)
Resistance (R11) is connected to the outfan of the first amplifier (A1), and the outfan of the first amplifier (A1) is connected by the 12nd resistance (R12)
To signal output part (OUT), the normal phase input end of the first amplifier (A1) passes through the 13rd resistance (R13) ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620573014.7U CN205847428U (en) | 2016-06-05 | 2016-06-05 | A kind of video signal transmission circuit of improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620573014.7U CN205847428U (en) | 2016-06-05 | 2016-06-05 | A kind of video signal transmission circuit of improvement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205847428U true CN205847428U (en) | 2016-12-28 |
Family
ID=58153210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620573014.7U Expired - Fee Related CN205847428U (en) | 2016-06-05 | 2016-06-05 | A kind of video signal transmission circuit of improvement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205847428U (en) |
-
2016
- 2016-06-05 CN CN201620573014.7U patent/CN205847428U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20161228 Termination date: 20170605 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |