Patent ID: 6590379
Filing Date: 2003-07-08
Classification: G01R

Abstract:
An envelope detector for detecting an envelope of an input signal, said envelope detector comprising:(a) an input port for receiving the input signal; (b) a first inverter coupled to said input port for inverting the input signal and generating an inverted input signal; (c) an offset stage having a first offset circuit coupled to said input port for offsetting said input signal such that peaks in the input signal are aligned at zero volts, and a second offset circuit coupled to the output of said first inverter for offsetting said inverted input signal such that peaks in said inverted input signal are aligned at zero volts, said first offset circuit generating an offset input signal and said second offset circuit generating an offset inverted input signal; and (d) a summer circuit having an input coupled to the output of said first offset circuit and to the output of said second offset circuit for summing said offset input signal and said offset inverted input signal to generate, at an output port, a resultant signal corresponding to the envelope of said input signal.