Patent ID: 6791303
Filing Date: 2004-09-14
Classification: H02M

Abstract:
A voltage stabilization circuit, comprising:a first signal line for carrying a signal superimposed with an interference signal; a second signal line for carrying a signal; an amplifier circuit for generating an antiphase signal from a difference between a stabilized reference signal and a signal derived from said interference signal, said antiphase signal being in phase opposition with respect to said interference signal, said amplifier circuit including a first input; an active matching circuit for potential matching, said matching circuit connected downstream from said amplifier circuit, said matching circuit for generating a compensation signal from said antiphase signal, said compensation signal being superposed on said signal superimposed with said interference signal; and a reference circuit for generating said stabilized reference signal, said reference circuit connected upstream from said amplifier circuit, said reference circuit designed as a low-pass filter connected between said first signal line and said second signal line, said reference circuit including a center tap connected to said first input of said amplifier circuit for providing said stabilized reference signal to said first input of said amplifier circuit; said low-pass filter designed as a multistage filter or as a higher-order filter.