CN201674586U - Weighting video amplification distributor - Google Patents
Weighting video amplification distributor Download PDFInfo
- Publication number
- CN201674586U CN201674586U CN2010202200156U CN201020220015U CN201674586U CN 201674586 U CN201674586 U CN 201674586U CN 2010202200156 U CN2010202200156 U CN 2010202200156U CN 201020220015 U CN201020220015 U CN 201020220015U CN 201674586 U CN201674586 U CN 201674586U
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- video
- weighting
- distributor
- amplifies
- frequency
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- Expired - Fee Related
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Abstract
The utility model discloses a weighting video amplification distributor, which comprises a power supply 1, a video amplification circuit 2, a weighting compensation network 3 and a video distribution circuit 4. The weighting video amplification distributor can present different gains on different frequency components oppositely to cable transmission characteristics, namely the lower the frequency, the lower the gain, and the higher the frequency, the higher the gain. Accordingly, the weighting video amplification distributor realizes effective 'gain-frequency' compensation for cable attenuation of video signals, restores the level of a source signal, and then divides the signal into three routes of same videos independently outputted to be used by other video processors, thereby greatly improving the transmission quality of the video signals and achieving longer video transmission distance.
Description
Technical field
The utility model relates to a kind of weighting video and amplifies distributor, and the signal that belongs to video signal transmission system amplifies compensation and distributing equipment.
Background technology
In TV monitor system, the camera video picture signal is directly through after the transmission of the coaxial cable of longer distance, because coaxial cable has different attenuation characteristics to the signal of different frequency component, so through the vision signal after the transmission, not only on the amplitude decay is arranged, and the relative scale of various frequency contents produced variation, frequency is high more, attenuation is big more, frequency distortion that Here it is.The decay of amplitude will cause image contrast to descend, and become gloomy.And frequency distortion, high fdrequency component decays significantly, can cause color saturation and definition seriously to reduce again, and image detail is thickened.The ordinary video amplifier is made up of video amplifier circuit, in 6M effective bandwidth, provides identical gain to all frequency components.Make signal compensation with this amplifier, obviously can't compensate the frequency distortion of vision signal, also just can't improve picture quality.And, when satisfying high frequency compensation, can produce the low frequency overcompensation, cause capable synchronous head overshoot, the look bright gain inequality and the phase difference distortion factor exceed standard.
Vision signal through cable transmission output, be sent to terminal equipments such as monitor, video tape recorder, transmitting device, hard copy imaging possibly, finish the demonstration and the writing function of imaging, at this, then need to use video distributor, realize the function of one road video input, multi-channel video output, making it can be distortionless or do not have and finish video output under the loss of sharpness situation.Now only produce the independent video amplifier and video distributor on the market, generally when using the video amplifier, must connect a distributor again and be used, expended equipment cost and equipment volume.
The utility model content
At above-mentioned situation, the utility model provides the weighting video amplification distributor that a kind of complementary range is longer, compensation characteristic is better, have distribution function.
For achieving the above object, the utility model has adopted following technical scheme: a kind of weighting video amplifies distributor, comprises power supply, video amplifier circuit, weighting compensating network and video distribution circuit.
Described power supply is by integrated circuit (IC) 1-BM1117-5, IC2-BM34063, capacitor C 1, C2, C3, C4, C5, C17, C21, and resistance R 1, R3, R4, R5, R6, inductance L 1 and diode D2, D5 are formed by connecting;
Described video amplifier circuit amplifies chip IC 3-NE592 by video, potentiometer VR1, and resistance R 8, R24 are formed by connecting.
Described weighting compensating network is formed in parallel by six compensating circuits, and described six compensating circuits are connected in series with six toggle switch S1 by capacitor C 9-C14 respectively and form.
Described video distribution circuit is by chip IC 4-EL2480, and resistance R 9-R23 and capacitor C 8 are formed by connecting.Described chip IC 4-EL2480 comprises three independently video distribution integrated circuit (IC) 4A, IC4B, IC4C.
Owing to adopt said structure,, designed the utility model weighting video and amplified distributor according to the weighting compensation principle of video amplifier circuit.At input the vision signal that decays is weighted amplification, promptly the signal to the different frequency component produces different gains, and frequency low gain more is low more, and frequency high-gain more is high more, forms and the opposite compensation characteristic of cable actual attenuation characteristic.In addition, because cable length is long more, attenuation is also big more, the compensation rate that needs is also big more, regulates six toggle switchs, can be used as multistage gain-adjusted, carry out different compensating gain adjustings according to coaxial cable length is different, thereby can recover fully the vision signal of decay.At last the vision signal of recovering is divided into three tunnel identical vision signals by the video distribution circuit and independently exports, use for other video processors.
Description of drawings
Fig. 1: the utility model structure block diagram
Fig. 2: the utility model power circuit diagram
Fig. 3: the utility model weighting compensating network and video distribution circuit diagram
Among the figure: 1: power supply, 2: video amplifier circuit, 3: weighting compensating network, 4: the video distribution circuit.
Embodiment:
As shown in Figure 1: the utility model weighting video amplifies distributor, comprises power supply 1, video amplifier circuit 2, weighting compensating network 3 and video distribution circuit 4.
As shown in Figure 2: power supply 1 is by integrated circuit (IC) 1-BM1117-5, IC2-BM34063, capacitor C 1, C2, C3, C4, C5, C17, C21, and resistance R 1, R3, R4, R5, R6, inductance L 1 and diode D2, D5 are formed by connecting; DC12V is through filter capacitor C1, C21, current-limiting resistance R3, and IC1 power supply integrated package, filter capacitor C2 outputting standard+5V voltage; Through capacitor C 3, C4, C5, C7, resistance R 4-R6, IC2 video integrated package, diode D5, inductance L 1 modulation outputting standard-5V voltage.
As shown in Figure 3: video amplifier circuit 2 amplifies chip IC 3-NE592 by video, potentiometer VR1, and resistance R 8, R24 are formed by connecting.Vision signal is input to 1 pin of IC3 integrated package through the R8 impedance matching, amplifies the compensation back through potentiometer VR1 and exports from 7 pin of IC3.
Weighting compensating network 3 is formed in parallel by six compensating circuits, and described six compensating circuits are connected in series with six toggle switch S1 by capacitor C 9-C14 respectively and form.Regulate this stage gain of C9-C14 scalable IC3 integrated package; Six toggle switch S1 can be used as multistage gain-adjusted, carry out different compensating gains according to coaxial cable length difference and regulate.
Claims (4)
1. a weighting video amplifies distributor, comprise power supply (1), video amplifier circuit (2), described power supply (1) is by integrated circuit (IC) 1-BM1117-5, IC2-BM34063, capacitor C 1, C2, C3, C4, C5, C17, C21, resistance R 1, R3, R4, R5, R6, inductance L 1 and diode D2, D5 are formed by connecting; Described video amplifier circuit (2) amplifies chip by video, potentiometer VR1, resistance R 8, R24 are formed by connecting, it is characterized in that also comprising weighting compensating network (3) and video distribution circuit (4), described weighting compensating network (3) is connected to the gain control end of video amplifier circuit (2), and video distribution circuit (4) is connected to the output of video amplifier circuit (2).
2. weighting video according to claim 1 amplifies distributor, it is characterized in that described weighting compensating network (3) is formed in parallel by six compensating circuits, and described six compensating circuits are connected in series with six toggle switch S1 by capacitor C 9-C14 respectively and form.
3. weighting video according to claim 1 amplifies distributor, it is characterized in that described video distribution circuit (4) is by chip IC 4-EL2480, resistance R 9-R23 and capacitor C 8 are formed by connecting, and described chip IC 4-EL2480 comprises three independently video distribution integrated circuit (IC) 4A, IC4B, IC4C.
4. weighting video according to claim 1 amplifies distributor, it is characterized in that described video amplifies chip and adopts the IC3-NE592 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202200156U CN201674586U (en) | 2010-06-05 | 2010-06-05 | Weighting video amplification distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202200156U CN201674586U (en) | 2010-06-05 | 2010-06-05 | Weighting video amplification distributor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201674586U true CN201674586U (en) | 2010-12-15 |
Family
ID=43331993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202200156U Expired - Fee Related CN201674586U (en) | 2010-06-05 | 2010-06-05 | Weighting video amplification distributor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201674586U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332246A (en) * | 2011-09-28 | 2012-01-25 | 常州工学院 | Video graphics array (VGA) multi-channel distribution circuit and working method thereof |
| CN102710899A (en) * | 2012-05-14 | 2012-10-03 | 安徽清大德人医疗科技股份有限公司 | Internal video distributor of medical case |
| CN118337945A (en) * | 2024-06-17 | 2024-07-12 | 诸暨市融媒体中心 | Video and audio transmission method and device and rebroadcasting vehicle |
-
2010
- 2010-06-05 CN CN2010202200156U patent/CN201674586U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332246A (en) * | 2011-09-28 | 2012-01-25 | 常州工学院 | Video graphics array (VGA) multi-channel distribution circuit and working method thereof |
| CN102332246B (en) * | 2011-09-28 | 2014-04-09 | 常州工学院 | Video graphics array (VGA) multi-channel distribution circuit and working method thereof |
| CN102710899A (en) * | 2012-05-14 | 2012-10-03 | 安徽清大德人医疗科技股份有限公司 | Internal video distributor of medical case |
| CN118337945A (en) * | 2024-06-17 | 2024-07-12 | 诸暨市融媒体中心 | Video and audio transmission method and device and rebroadcasting vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHAOXING AODUN ELECTRONIC CO., LTD. Free format text: FORMER OWNER: SHANGYU YUHENG ELECTRONIC CO., LTD. Effective date: 20121225 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121225 Address after: Shangyu City, Zhejiang province people's road 312300 No. 567 high tech Incubator Building 1 floor 2 Patentee after: Shaoxing Aodun Electronics Co., Ltd. Address before: Shangyu City, Zhejiang province people's road 312300 No. 567 high tech Incubator Building 1 floor 2 Patentee before: Shangyu City Yuheng Electronic Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20140605 |