Data bus fault detection circuit and method

Abstract From the Canadian patent

A receiver circuit is connected to a differential serial bus having first and second signal conductors. The receiver circuit includes a fault detection circuit, which generates a difference signal representing a difference between a first signal, on the first conductor and a second signal on the second conductors. A comparing, circuit includes a plurality of comparators for comparing the difference signal, the, first signal and the second signal to predetermined voltage levels. The comparing, circuit also includes a plurality of logic units coupled to outputs of the comparators. A signal select circuit has a pair of inputs coupled to the first and second conductors, logic inputs …