Patent ID: 6828853
Filing Date: 2004-12-07
Classification: G06K,H03D,H03K

Abstract:
A demodulator for demodulating an amplitude modulated alternating signal comprising:a peak detection circuit for detecting a reference modulating signal from the amplitude modulated alternating signal; a first translation circuit connected to said peak detection circuit for offsetting a level of the reference modulating signal by a value equal to a DC component to obtain an offset reference modulated signal; a comparison threshold generator circuit connected to said first translation circuit for generating a comparison threshold for locating a start and an end of the modulation; a comparator circuit connected to said comparison threshold generator circuit for comparing the offset reference modulated signal with the comparison threshold, and for providing signals crossing the comparison threshold; and a supply circuit for providing an unregulated supply voltage to said first translation circuit, to said comparison threshold generator circuit and to said comparator circuit.