CN104602091B - A kind of computer video signal acquisition processing device - Google Patents
A kind of computer video signal acquisition processing device Download PDFInfo
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- CN104602091B CN104602091B CN201510035065.4A CN201510035065A CN104602091B CN 104602091 B CN104602091 B CN 104602091B CN 201510035065 A CN201510035065 A CN 201510035065A CN 104602091 B CN104602091 B CN 104602091B
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Abstract
本发明公开了一种计算机视频信号采集处理装置，包括视频信号输入端、视频信号输出端、运算放大器芯片、第一电阻至第七电阻、第一电容至第五电容和三极管，将视频信号及其补偿输出分别送至运算放大器芯片的反相和同相输入端.在运算放大器芯片的输出端接一级射极跟随器以增强信号的驱动能力。与现有技术相比，本发明通过电子元器件和芯片，使用视频信号采集速度增强，提高视频信号的驱动能力，有效的提高计算机网络视频信号的清晰度和传输速度，使用方便，具有推广应用的价值。
The invention discloses a computer video signal acquisition and processing device, which includes a video signal input terminal, a video signal output terminal, an operational amplifier chip, a first resistor to a seventh resistor, a first capacitor to a fifth capacitor, and a triode. Its compensation output is sent to the inverting and non-inverting input terminals of the operational amplifier chip respectively. The output terminal of the operational amplifier chip is connected with a first-stage emitter follower to enhance the driving ability of the signal. Compared with the prior art, the present invention uses electronic components and chips to enhance the acquisition speed of video signals, improve the driving ability of video signals, effectively improve the definition and transmission speed of computer network video signals, and is convenient to use and has popularization and application the value of.
Description
技术领域technical field
本发明涉及一种计算机相关辅助装置，尤其涉及一种计算机视频信号采集处理装置。The invention relates to a computer-related auxiliary device, in particular to a computer video signal acquisition and processing device.
背景技术Background technique
视频泛指将一系列静态影像以电信号的方式加以捕捉、纪录、处理、储存、传送与重现的各种技术。连续的图像变化每秒超过24帧画面以上时，根据视觉暂留原理，人眼无法辨别单幅的静态画面；看上去是平滑连续的视觉效果，这样连续的画面叫做视频。视频技术最早是为了电视系统而发展，但现在已经发展为各种不同的格式以利消费者将视频记录下来。网络技术的发达也促使视频的纪录片段以串流媒体的形式存在于因特网之上并可被电脑接收与播放。现有技术中用于计算机的视频信号传输较慢，视频驱动能力弱，导致在运行网络视频的时候视频很不清晰，而且较慢，当然，这与网络速度还有一定的关系，但是，视频本身的传输速度还是具有特别大的影响。Video generally refers to various technologies that capture, record, process, store, transmit and reproduce a series of still images in the form of electrical signals. When the continuous image change exceeds 24 frames per second, according to the principle of visual persistence, the human eye cannot distinguish a single static image; it looks like a smooth and continuous visual effect, such a continuous image is called a video. Video technology was originally developed for television systems, but has since evolved into a variety of different formats for consumers to record video. The development of network technology also enables video documentary segments to exist on the Internet in the form of streaming media and can be received and played by computers. In the prior art, the video signal transmission used for computers is relatively slow, and the video driving ability is weak, which causes the video to be very unclear and slow when running network video. Of course, this has a certain relationship with the network speed, but the video The transmission speed itself still has a particularly large impact.
发明内容Contents of the invention
本发明的目的就在于为了解决上述问题而提供一种计算机视频信号采集处理装置。The object of the present invention is to provide a computer video signal acquisition and processing device in order to solve the above problems.
本发明通过以下技术方案来实现上述目的：The present invention achieves the above object through the following technical solutions:
本发明包括视频信号输入端、视频信号输出端、运算放大器芯片、第一电阻至第七电阻、第一电容至第五电容和三极管，所述视频信号输入端的正极与所述第一电阻的第一端连接，所述第一电阻的第二端同时与所述第一电容的第一端和所述运算放大器芯片的第二引脚连接，所述视频信号输入端的负极与所述第二电阻的第一端连接，所述第二电阻的第二端同时与所述第二电容的第一端和所述运算放大器芯片的第三引脚连接，所述运算放大器芯片的第一引脚通过所述第三电阻与所述运算放大器芯片的第八引脚连接，所述运算放大器芯片的第七引脚同时与所述第三电容和所述第四电容的第一端连接，所述运算放大器芯片的第六引脚通过所述第四电阻与所述三极管的基极连接，所述运算放大器芯片的第五引脚通过所述第五电阻同时与所述第七电阻的第一端和所述三极管的发射极连接，所述第七电阻的第二端与所述视频信号输出端的负极连接，所述视频信号输出端的正极通过所述第五电容与所述三极管的集电极连接，所述第一电容至所述第四电容的第二端以及所述运算放大器芯片的第四引脚均接地。The present invention includes a video signal input terminal, a video signal output terminal, an operational amplifier chip, a first resistor to a seventh resistor, a first capacitor to a fifth capacitor, and a triode. One end is connected, the second end of the first resistor is connected with the first end of the first capacitor and the second pin of the operational amplifier chip at the same time, the negative pole of the video signal input end is connected with the second resistor connected to the first end of the second resistor, the second end of the second resistor is connected to the first end of the second capacitor and the third pin of the operational amplifier chip at the same time, and the first pin of the operational amplifier chip is passed through The third resistor is connected to the eighth pin of the operational amplifier chip, and the seventh pin of the operational amplifier chip is connected to the first end of the third capacitor and the fourth capacitor at the same time, and the operational The sixth pin of the amplifier chip is connected to the base of the triode through the fourth resistor, and the fifth pin of the operational amplifier chip is connected to the first end of the seventh resistor and the first end of the seventh resistor through the fifth resistor. The emitter of the triode is connected, the second end of the seventh resistor is connected to the negative pole of the video signal output end, and the positive pole of the video signal output end is connected to the collector of the triode through the fifth capacitor, so The second ends of the first capacitor to the fourth capacitor and the fourth pin of the operational amplifier chip are all grounded.
本发明的有益效果在于：The beneficial effects of the present invention are:
本发明是一种计算机视频信号采集处理装置，与现有技术相比，本发明通过电子元器件和芯片，使用视频信号采集速度增强，提高视频信号的驱动能力，有效的提高计算机网络视频信号的清晰度和传输速度，使用方便，具有推广应用的价值。The present invention is a computer video signal collection and processing device. Compared with the prior art, the present invention uses electronic components and chips to enhance the speed of video signal collection, improve the driving ability of video signals, and effectively improve the performance of computer network video signals. Clarity and transmission speed, easy to use, has the value of popularization and application.
附图说明Description of drawings
图1是本发明的电路结构原理图。Fig. 1 is a schematic diagram of the circuit structure of the present invention.
具体实施方式detailed description
下面结合附图对本发明作进一步说明：The present invention will be further described below in conjunction with accompanying drawing:
如图1所示：本发明包括视频信号输入端IN、视频信号输出端OUT、运算放大器芯片IC、第一电阻R1至第七电阻R7、第一电容C1至第五电容C5和三极管VT组成，视频信号输入端IN的正极与第一电阻R1的第一端连接，第一电阻R1的第二端同时与第一电容C1的第一端和运算放大器芯片IC的第二引脚连接，视频信号输入端IN的负极与第二电阻R2的第一端连接，第二电阻R2的第二端同时与第二电容C2的第一端和运算放大器芯片IC的第三引脚连接，运算放大器芯片IC的第一引脚通过第三电阻R3与运算放大器芯片IC的第八引脚连接，运算放大器芯片IC的第七引脚同时与第三电容C3和第四电容C4的第一端连接，运算放大器芯片IC的第六引脚通过第四电阻R4与三极管VT的基极连接，运算放大器芯片IC的第五引脚通过第五电阻R5同时与第七电阻R7的第一端和三极管VT的发射极连接，第七电阻R7的第二端与视频信号输出端OUT的负极连接，视频信号输出端OUY的正极通过第五电容C5与三极管VT的集电极连接，第一电容C1至第四电容C4的第二端以及运算放大器芯片IC的第四引脚均接地。As shown in Figure 1: the present invention comprises a video signal input terminal IN, a video signal output terminal OUT, an operational amplifier chip IC, a first resistor R1 to a seventh resistor R7, a first capacitor C1 to a fifth capacitor C5, and a triode VT. The anode of the video signal input terminal IN is connected to the first end of the first resistor R1, and the second end of the first resistor R1 is connected to the first end of the first capacitor C1 and the second pin of the operational amplifier chip IC at the same time, and the video signal The negative pole of the input terminal IN is connected to the first end of the second resistor R2, and the second end of the second resistor R2 is simultaneously connected to the first end of the second capacitor C2 and the third pin of the operational amplifier chip IC, and the operational amplifier chip IC The first pin of the operational amplifier chip IC is connected to the eighth pin of the operational amplifier chip IC through the third resistor R3, and the seventh pin of the operational amplifier chip IC is connected to the first ends of the third capacitor C3 and the fourth capacitor C4 at the same time, and the operational amplifier The sixth pin of the chip IC is connected to the base of the transistor VT through the fourth resistor R4, and the fifth pin of the operational amplifier chip IC is connected to the first end of the seventh resistor R7 and the emitter of the transistor VT through the fifth resistor R5 connected, the second end of the seventh resistor R7 is connected to the negative pole of the video signal output terminal OUT, the positive pole of the video signal output terminal OUY is connected to the collector of the triode VT through the fifth capacitor C5, and the first capacitor C1 to the fourth capacitor C4 Both the second terminal and the fourth pin of the operational amplifier chip IC are grounded.
本发明的工作原理如下：The working principle of the present invention is as follows:
运算放大器芯片IC集成了3路运放.可单电源或双电源工作，具有较高的CMRR和极低的电压漂移，除了一个控制可编程增益的外接电阻外，所有元件都集成在内部，提高了电路温度稳定度和可靠性。将视频信号及其补偿输出分别送至运算放大器芯片IC的反相和同相输入端.在运算放大器芯片IC的输出端接一级射极跟随器以增强信号的驱动能力。The operational amplifier chip IC integrates 3 operational amplifiers. It can work with single power supply or dual power supply, with high CMRR and extremely low voltage drift. Except for an external resistor that controls the programmable gain, all components are integrated internally to improve circuit temperature stability and reliability. The video signal and its compensation output are respectively sent to the inverting and non-inverting input terminals of the operational amplifier chip IC. A first-stage emitter follower is connected to the output terminal of the operational amplifier chip IC to enhance the driving capability of the signal.
本发明的元器件参数选择如下：Components parameter selection of the present invention is as follows:
运算放大器芯片IC型号为AD623、第一电阻R1为100Ω、第二电阻R2为400Ω、第三电阻R3为500Ω、第四电阻R4为2kΩ、第五电阻R5为27kΩ、第七电阻R7为200Ω、第一电容C1为300uf、第二电容C2为470uf、第三电容C3为100uf、第四电容C4为1000uf、第五电容C5为10uf、三极管VT为PNP型三极管。The IC model of the operational amplifier chip is AD623, the first resistor R1 is 100Ω, the second resistor R2 is 400Ω, the third resistor R3 is 500Ω, the fourth resistor R4 is 2kΩ, the fifth resistor R5 is 27kΩ, and the seventh resistor R7 is 200Ω. The first capacitor C1 is 300uf, the second capacitor C2 is 470uf, the third capacitor C3 is 100uf, the fourth capacitor C4 is 1000uf, the fifth capacitor C5 is 10uf, and the transistor VT is a PNP transistor.
以上显示和描述了本发明的基本原理和主要特征及本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202617273U (en) * | 2012-05-25 | 2012-12-19 | 上海恒锐智能工程有限公司 | Video signal transmission equipment with front-end amplifier |
| CN103475864A (en) * | 2013-09-10 | 2013-12-25 | 成都凯智科技有限公司 | Video image sending circuit |
| CN203492096U (en) * | 2013-10-15 | 2014-03-19 | 成都凯智科技有限公司 | Video amplifier |
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| US6822510B1 (en) * | 2003-05-01 | 2004-11-23 | Tektronix, Inc. | Power-off, loop-through return-loss with negative capacitance |
| TWI332799B (en) * | 2006-09-13 | 2010-11-01 | Realtek Semiconductor Corp | A video data source system and an analog back end device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202617273U (en) * | 2012-05-25 | 2012-12-19 | 上海恒锐智能工程有限公司 | Video signal transmission equipment with front-end amplifier |
| CN103475864A (en) * | 2013-09-10 | 2013-12-25 | 成都凯智科技有限公司 | Video image sending circuit |
| CN203492096U (en) * | 2013-10-15 | 2014-03-19 | 成都凯智科技有限公司 | Video amplifier |
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