Patent ID: 6617925
Filing Date: 2003-09-09
Classification: H03K,H04L

Abstract:
A differential signaling apparatus, comprising:a pair of input nodes that receive a differential signal having an input common mode voltage; a pair of output nodes; a first compensation circuit coupled to the input nodes and the output nodes, the first compensation circuit being operative to establish a first component of a differential voltage across the pair of output nodes in response to the received differential signal; a second compensation circuit coupled to the input nodes and the output nodes, the second compensation circuit being operative to establish a second component of the differential voltage across the pair of output nodes in response to the received differential signal; and a control circuit that senses an operational characteristic of the first compensation circuit and controls operation of the second compensation circuit in accordance with the sensed operational characteristic, wherein the first compensation circuit is more operative at a first level of the input common mode voltage than at a second level of the input common mode voltage, and wherein the second compensation circuit is more operative at the second level of the input common mode voltage than at the first level of the input common mode voltage.