Adaptive hysteresis for reduced swing signalling circuits

摘要

Apparatus ( 50 ) for processing a differential input signal. The apparatus ( 50 ) comprises a minimum peak detector ( 51 ) with a differential input ( 28 ). The peak detector ( 51 ) provides a first voltage being proportional to an average voltage peak at the peak detector's differential input ( 28 ). A compressor ( 53 ) is provided for processing the first voltage in order to provide a second voltage. The compressor ( 53 ) is followed by a voltage controllable current source providing a trim current that is adjustable by the second voltage. A hysteresis equipped circuit ( 67.1 ) whose hysteresis characteristics are adjustable by the trim current is part of the apparatus ( 50 ).