Analog filtering
Filtering: Theory and Practice Linear filtering: Analog filtering

The term "analog" comes from the Greek analogos (αναλογος) meaning "which is related to, proportional". By extension to the original meaning of analog, a quantity is said to be analog if its measurement varies continuously.

Electronics uses analog circuits based on resistors, inductors, capacitors, diodes, transistors, operational amplifiers, etc., as a calculator or processing medium. There is an analogy between the mechanical system (the first...