ABSTRACT
Most of the circuits today do not require passive attenuators and/or impedance matching devices as their input impedance is high and their output impedance is low. However, if a low-impedance output feeds a long line to a high-impedance input, high-frequency losses will occur if the line is not terminated with a matched impedance. This may be thousands of feet or a few feet when using older equipment that was designed for matched operation. When connecting to external circuits, the signal must often be attenuated to meet standards, a good place for low-maintenance passive attenuators.
