A way to realize multiple circuit transfer functions using OTAs and grounded capacitors

摘要

This paper introduces a way to realize multiple circuit transfer functions with two integrator loop structure consisting loss-less integrators. The basic circuit configuration is constructed with six Operational Transconductance Amplifiers (OTAs) and two grounded capacitors. It is shown that high-pass, band-stop and all-pass transfer functions can be realized by suitably choosing the input terminals, and that the circuit parameters can also be independently set by the transconductance gains with the proportional block. Although the circuit configuration has been known, it seems that the feature for realizing their transfer functions makes the structure more attractive and useful. An example is given together with simulated results by PSPICE.