Differential output type filter circuit

Abstract

A differential output type filter circuit comprises, between its input terminal and differential output terminal, a reference voltage generator circuit which receives supply voltage Vcc and outputs a reference voltage, an SVR correction circuit which filters out the noise component superposed on said reference voltage, an n-order filter circuit which functions to filter out the noise of an input signal corresponding to the input of this applied signal, this n-order filter circuit being composed of a first-stage primary filter circuit 3 and an (n-1)-order filter circuit 4, and a post-amplifier circuit 5 which receives and differentially amplifies the output signal from the SVR correction circuit and output signal 105 from said n-order filter circuit. This configuration represents a so-called single-signal input type filter circuit, and features compactness and excellent SVR characteristics.

Dependencies are inferred from the claim text.