CN205249323U - A controller for video signal modulation - Google Patents
A controller for video signal modulation Download PDFInfo
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- CN205249323U CN205249323U CN201521046382.8U CN201521046382U CN205249323U CN 205249323 U CN205249323 U CN 205249323U CN 201521046382 U CN201521046382 U CN 201521046382U CN 205249323 U CN205249323 U CN 205249323U
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Abstract
The utility model discloses a controller for video signal modulation, including resistance R3, resistance R7, triode V1, inductance L1, inductance L2 and inductance L3, video signal IN is connected to resistance R3's one end, electric capacity C2 is connected to resistance R3's the other end, triode V1's base is connected to electric capacity C2's the other end, resistance R1 and resistance R2, resistance R1's other end connecting resistance R7, resistance R10, power VCC and triode V1's collecting electrode, electric capacity C1 and resistance R4 are connected to triode V1's projecting pole, resistance R2's other end connecting resistance R4, resistance R6, resistance R8, resistance R11, electric capacity C3, electric capacity C4, electric capacity C8 and electric capacity C9. The utility model discloses a controller for video signal modulation circuit structure is simple, components and parts are few, carries out low pass filter and vision carrier respectively with video signal and handles, and clutter in simultaneously can also effectual reduction video signal increases the interference immunity of circuit, consequently has the advantage of with low costs, convenient to use and stable performance.
Description
Technical field
The utility model relates to a kind of signal processing circuit, specifically a kind of controller for vision signal modulation.
Background technology
Vision signal is one of signal often contacting in daily life, and cable television, video recorder, CD player all can be used videoThe transmission of signal, and along with the development of modern electronic technology, video monitoring system also develops rapidly, video monitoring systemSystem is the important component part in safety-security area, is the subsystem of most critical in all security systems, and system is made a video recording by remote controlMachine, directly observes the situation that is monitored place, the situation that is monitored place can be carried out to synchronized video recording, use now simultaneouslyVision signal radio-frequency modulator circuit in video monitoring is loaded down with trivial details, and cost of manufacture is high, consumes energy higher, and anti-interference is poor, noBe beneficial to the control of cost.
Utility model content
The purpose of this utility model is to provide a kind of controller for vision signal modulation, to solve in above-mentioned background technologyThe problem proposing.
For achieving the above object, the utility model provides following technical scheme:
For a controller for vision signal modulation, comprise resistance R 3, resistance R 7, triode V1, inductance L 1, inductanceL2 and inductance L 3, one end of described resistance R 3 connects vision signal IN, and the other end of resistance R 3 connects capacitor C 2, electric capacityBase stage, resistance R 1 and the resistance R 2 of the other end connecting triode V1 of C2, the other end contact resistance R7 of resistance R 1, electricityThe colelctor electrode of resistance R10, power supply VCC and triode V1, the emitter stage of triode V1 connects capacitor C 1 and resistance R 4, electricityOther end contact resistance R4, resistance R 6, resistance R 8, resistance R 11, capacitor C 3, capacitor C 4, capacitor C 8 and of resistance R2Capacitor C 9, the other end of capacitor C 1 connects the other end of inductance L 2 and resistance R 5, and the other end of inductance L 2 connects inductanceThe other end of L3 and capacitor C 3, the other end of inductance L 3 connects the other end, the other end of resistance R 6, the resistance of capacitor C 4The other end of R7, the other end of resistance R 8, capacitor C 5 and capacitor C 6, the other end of capacitor C 5 connects signal output part OUT,The other end of capacitor C 6 connects the base stage of the other end, resistance R 9 and the triode V2 of capacitor C 7, capacitor C 8, capacitor C 7The other end connect the other end of inductance L 1 and resistance R 9, the other end of inductance L 1 connects the other end, the resistance of capacitor C 9The colelctor electrode of the other end of R10 and triode V2, the other end of the emitter stage contact resistance R11 of triode V2.
As preferred version of the present utility model: described power supply VCC is 9V direct current.
Compared with prior art, the beneficial effects of the utility model are: the utility model is for the controller of vision signal modulationCircuit structure is simple, components and parts are few, and vision signal is carried out respectively to LPF and image carrier processing, simultaneously can also be effectiveMinimizing vision signal in clutter, increase the anti-interference of circuit, therefore there is low, the easy to use and stable performance of costAdvantage.
Brief description of the drawings
Fig. 1 is a kind of circuit diagram of the controller for vision signal modulation.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out clearlyChu, intactly description, obviously, described embodiment is only the utility model part embodiment, instead of wholeEmbodiment. Based on the embodiment in the utility model, those of ordinary skill in the art are not making under creative work prerequisiteThe every other embodiment obtaining, belongs to the scope that the utility model is protected.
Refer to Fig. 1, a kind of controller for vision signal modulation, comprise resistance R 3, resistance R 7, triode V1,Inductance L 1, inductance L 2 and inductance L 3, one end of described resistance R 3 connects vision signal IN, and the other end of resistance R 3 connectsCapacitor C 2, base stage, resistance R 1 and the resistance R 2 of the other end connecting triode V1 of capacitor C 2, the other end of resistance R 1The colelctor electrode of contact resistance R7, resistance R 10, power supply VCC and triode V1, the emitter stage of triode V1 connects capacitor C 1With resistance R 4, the other end contact resistance R4 of resistance R 2, resistance R 6, resistance R 8, resistance R 11, capacitor C 3, electric capacityC4, capacitor C 8 and capacitor C 9, the other end of capacitor C 1 connects the other end of inductance L 2 and resistance R 5, inductance L 2 anotherOne end connects the other end of inductance L 3 and capacitor C 3, and the other end of inductance L 3 connects the other end, the resistance R 6 of capacitor C 4The other end, the other end of resistance R 7, the other end, capacitor C 5 and the capacitor C 6 of resistance R 8, the other end of capacitor C 5 connectsMeet signal output part OUT, the other end of capacitor C 6 connects the other end, resistance R 9 and the triode of capacitor C 7, capacitor C 8The base stage of V2, the other end of capacitor C 7 connects the other end of inductance L 1 and resistance R 9, and the other end of inductance L 1 connects electric capacityThe colelctor electrode of the other end of C9, the other end of resistance R 10 and triode V2, the emitter stage contact resistance R11 of triode V2The other end.
Power supply VCC is 9V direct current.
Operation principle of the present utility model is: circuit is made up of emitter follower, low pass filter and image carrier oscillating circuit,Wherein emitter follower is made up of resistance R 3, capacitor C 2, resistance R 1, resistance R 2, resistance R 4, triode V1. to lookingFrequently signal amplifies in right amount. Low pass filter is by resistance R 5, inductance L 2, inductance L 3, capacitor C 4, capacitor C 6, resistanceThe compositions such as R6, the composition diagrams such as triode V2, inductance L 1, capacitor C 7 are as carrier oscillation circuit, and its frequency is according to selectingTelevision reception channel determine, capacitor C 1 is coupling capacitance. Capacitor C 1, capacitor C 9 are resonant capacitance, by adjusting electricityHold the degree of coupling that C9 capacity can change signal. Inductance L 1 is oscillator coil, in order to improve the stability of carrying into frequency of oscillation.Vision signal IN enters capacitor C 1 and is coupled after emitter follower, and the vision signal of exporting through capacitor C 1 is divided two-way, and oneRoad enters low pass filter filtering, and another road enters image carrier oscillating circuit, through the filtered signal of low pass filter with carryRipple signal mixes, then delivers to output OUT through condenser capacitance C5, and come on TV connection socket for antenna or other signals of OUT termination connectsReceiving unit.
Claims (2)
1. for a controller for vision signal modulation, comprise resistance R 3, resistance R 7, triode V1, inductance L 1, electricitySense L2 and inductance L 3, is characterized in that, one end of described resistance R 3 connects vision signal IN, and the other end of resistance R 3 connectsConnect capacitor C 2, base stage, resistance R 1 and the resistance R 2 of the other end connecting triode V1 of capacitor C 2, another of resistance R 1The colelctor electrode of end contact resistance R7, resistance R 10, power supply VCC and triode V1, the emitter stage of triode V1 connects electric capacityC1 and resistance R 4, the other end contact resistance R4 of resistance R 2, resistance R 6, resistance R 8, resistance R 11, capacitor C 3, electricityHold C4, capacitor C 8 and capacitor C 9, the other end of capacitor C 1 connects the other end of inductance L 2 and resistance R 5, inductance L 2The other end connects the other end of inductance L 3 and capacitor C 3, and the other end of inductance L 3 connects the other end, the resistance R 6 of capacitor C 4The other end, the other end of resistance R 7, the other end, capacitor C 5 and the capacitor C 6 of resistance R 8, the other end of capacitor C 5 connectsMeet signal output part OUT, the other end of capacitor C 6 connects the other end, resistance R 9 and the triode of capacitor C 7, capacitor C 8The base stage of V2, the other end of capacitor C 7 connects the other end of inductance L 1 and resistance R 9, and the other end of inductance L 1 connects electric capacityThe colelctor electrode of the other end of C9, the other end of resistance R 10 and triode V2, the emitter stage contact resistance R11 of triode V2The other end.
2. according to a kind of controller for vision signal modulation claimed in claim 1, it is characterized in that described power supply VCCFor 9V direct current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521046382.8U CN205249323U (en) | 2015-12-15 | 2015-12-15 | A controller for video signal modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521046382.8U CN205249323U (en) | 2015-12-15 | 2015-12-15 | A controller for video signal modulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205249323U true CN205249323U (en) | 2016-05-18 |
Family
ID=55948387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521046382.8U Expired - Fee Related CN205249323U (en) | 2015-12-15 | 2015-12-15 | A controller for video signal modulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205249323U (en) |
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2015
- 2015-12-15 CN CN201521046382.8U patent/CN205249323U/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: 20160518 Termination date: 20161215 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |