Patent ID: 7295828
Filing Date: 2007-11-13
Classification: H03F,H04L

Abstract:
1. An apparatus for differential signal communications, the apparatus comprising: an input circuit operative to receive a first input voltage and a second input voltage of differential input signal, the input circuit operative to generate an input absolute value of the difference between a first current associated with the first input voltage and a second current associated with the second input voltage; a reference circuit operative to generate a reference absolute value of the difference between a first reference current associated with a first reference voltage and a second reference current associated with a second reference voltage; and a current comparator operative to compare the input absolute value and the reference absolute value such that if the input absolute value is greater than the reference absolute value, an incoming signal is determined to be an incoming communication signal and if the input absolute value is smaller than the reference absolute value, the incoming signal is determined to be an incoming noise signal.