Author Topic: Video distribution amplifier  (Read 1589 times)

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Offline sergeymkl

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Video distribution amplifier
« on: March 16, 2011, 12:13:55 am »
Hi,

can anyone propose me a simple way/circuit to amplify a CVBS video signal (i think normal 75R from RCA jack) so that i can split it to a disassembled chinese video TFT module (i think those must have termination resistors) and to a character insertor device i built with a PIC so that the signal will not become weaker when splitted and thus degraded.

Thanks
 

Offline scrat

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Re: Video distribution amplifier
« Reply #1 on: March 16, 2011, 12:58:16 am »
Although I'm not an expert, what you need is one (or more) buffer(s) working up to some MHz. Among the opamps there are some specifically designed for video applications. I think the best way should be to use two opamps connected to the terminated input, each with its output resistance added.
Take a look here, maybe you can find some typical circuits and can order samples, too.
http://www.analog.com/en/amplifiers-and-comparators/video-ampsbuffersfilters/products/index.html#Video_Buffers
One machine can do the work of fifty ordinary men. No machine can do the work of one extraordinary man. - Elbert Hubbard
 


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