RC null network requiring only two components of prescribed value

In many applications of the RC parallel-T null network, only two performance characteristics are considered important--the frequency and depth of the attenuation notch. In the design presented, four component values may deviate from design values. The measured values of these four components are used in calculating the values required for the remaining resistor and capacitor. Network production is simplified since performance is made dependent upon realizing a prescribed value for two rather than six components.