Patent ID: 6437639
Filing Date: 2002-08-20
Classification: H03H

Abstract:
A programmable high-pass filter providing a DC bias at an output, comprising:a capacitor connected between an input terminal and an output terminal; a plurality of switched voltage dividers being connected between a source of DC voltage and point of reference potential, each of said voltage dividers including at least two circuit elements having an electrical resistance characteristic and having a common circuit connection therebetween, said common circuit connection being commonly connected to said capacitor and said output terminal and thereby providing a DC bias voltage at said output terminal and wherein each of said circuit elements additionally include a series connected electrically controlled switch which is controlled by a control signal so as to open and close together in pairs for switching the circuit elements of each voltage divider selectively in and out of the filter and thereby control the frequency response of the filter as well as providing said DC bias voltage at said output terminal.