Revisiting the Circuit of an Operational Amplifier Notch Filter.

The circuit of an operational amplifier notch filter, using a simulated inductance, is revisited, to reveal its versatility in that, by suitable design and choice of the output point, one can obtain all kinds of filters – all-pass, low-pass, high-pass, band-pass, and band-stop – null as well as notch. Detailed analysis is followed by simulation, to bring out the important characteristics, and considerations in design for a prescribed specification. [ABSTRACT FROM AUTHOR]