Video distribution amplifier

[sergeymkl]

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

[scrat]

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