Specific frequency signal from a wide range of signals from a decoder

[Idea04]

Is it possible to separate a specific frequency signal from a wide range of signals from a decoder/demux. For an example if you had a frequency range from 1 hertz to 100 KHz, is it possible to separate a signal of let's say 60Hz from the other signals.

 

[chroot]

The appropriate circuit is called a "filter." There are a veritable zoo of different kinds of filters, both analog and digital, and they are one of the building blocks of all electrical engineering.

- Warren