For example in VHF TV a difference of at least two channelsl is required Further more, an input filter which is a part of input stages and an output filter which is a part of the output amplifier isolate the input from the output.
For example in VHF TV a difference of at least two channels is required. Furthermore, an input filter which is a part of input stages and an output filter which is a part of the output amplifier isolate the input from the output.