Hi people!

When we talk about electronics that drives RGB video signal (i.e.: transcoders or whatever more/less complex circuits), we have to do with components that very often are presents in many diagrams. For example I noticed that there are often capacitors and resistors series at RGB IC outputs. It is very common see 100uF + 75Ohm series, on each color channel out.

Specifically, I have to do with RGB encoder below:

Click to view attachment

As you can see there are capacitor+resistor series on video outputs from encoder; value are 220uF for capacitors and 75Ohm for resistors.

The question is simple: why they are present? What is their meaning in the circuit?

Thanks in advance

Most likely the resistors are to lower the output voltage and the capacitors are to help smooth (filter) the output signal.

The circuit internally probably operates at a higher voltage than an RGB signal normally is.
The circuit probably also produces jitter which the capacitors take care of.

I should look at this next time I'm in the lab.