Patent ID: 7746150
Filing Date: 2010-06-29
Classification: H03K

Abstract:
1. A fail-safe differential receiver circuit for use with a first differential input signal and a second differential input signal and at least one predetermined signal and a threshold voltage, the circuit comprising a differential amplifier configured to receive the first and second differential input signals, the differential amplifier generating first and second differential signals that are based on the first and second differential input signals and have a differential voltage, a peak detector coupled to the differential amplifier for generating a detect signal, a comparator coupled to the peak detector for comparing the detect signal to the threshold voltage and providing a comparison signal, and a directing circuit coupled to the differential amplifier for receiving the generated first and second differential signals and coupled to the comparator for receiving the comparison signal, the directing circuit selectively directing between the generated first and second differential signals and the at least one predetermined signal as a function of the value of the comparison signal from the comparator.