Patent ID: 6654192
Filing Date: 2003-11-25
Classification: G01R

Abstract:
A circuit for monitoring an amplitude of a differential analog signal, the circuit comprising:a differential track and hold stage controlled by a first differential logic timing signal, said differential track and hold stage tracking a differential analog input signal during a tracking phase that corresponds to a first logic state of the first differential logic timing signal producing a first differential analog output signal that is representative of the differential analog input signal, and storing the differential analog input signal during a successive storing phase that corresponds to a second logic state of the first differential logic timing signal; a differential output amplifier having inputs coupled to outputs of said differential track and hold stage producing an amplified differential output signal; a differential bistable circuit, controlled by a second differential logic timing signal, and having inputs coupled to a differential output of said differential output amplifier, and producing a third differential logic control signal; and a multiplexed amplifier, controlled by the third differential logic control signal, and having inputs coupled to the outputs of said differential track and hold stage and outputting a second differential analog output signal having an amplitude that is a function of an amplitude of the differential analog input signal.