Method and apparatus for feedback control of i/o characteristics of

Abstract

A transceiver network having a driver and a receiver circuit for providing an interface between, for example, a data bus and a system controller or the like is disclosed herein. The receiver circuit includes a first logic gate of a first predefined type for providing output signals in response to input signals in accordance with a first transfer characteristic governed by a first reference voltage. A compensation arrangement is provided for adjusting the first reference voltage, and includes a first compensation gate of the first predefined type having an output governed by the first reference voltage. A first feedback loop coupled to the first compensation gate's output varies the first reference voltage until the first compensation gate generates a predefined output signal. The driver network includes a second input logic gate of a second predefined type having a first current transfer characteristic governed by a gate control voltage. A second compensation arrangement adjusts the gate control voltage, and includes a second compensation gate of the second predefined type having a current transfer characteristic proportional to the first current transfer characteristic. A second feedback loop coupled to the second compensation gate varies the gate control voltage until current flowing through the second compensation gate matches a supply current.