Reduction on Power Dissipation of Filters Based on Local-Feedback Amplifier

This paper proposes a circuit structure which can reduce power dissipation of filters based on integrators and local-feedback voltage amplifiers. The local-feedback amplifier has voltage addition or subtraction functionality which is required to implement leapfrog filters. The proposed structure uses this functionality and MOSFETs operating in the triode region in combination in order to reduce the redundant circuit and current dissipation. Simulation results of the proposed structure show a reduced power dissipation and no significant impact to the transfer function.