Patent ID: 6366155
Filing Date: 2002-04-02
Classification: H03K

Abstract:
A reference voltage regulator for an integrated circuit that includes an output driver which varies in current drive capability in response to selective activation of a plurality of gate enable signals, a reference voltage distributor that receives a reference voltage and selectively activates the gate enable signals to provide a reference voltage in response to a plurality of current drive capability control signals during activation of an output enable signal, and a current control circuit that senses a load on the output driver and generates the current drive capability control signals, the reference voltage regulator comprising:a reference voltage generator that generates the reference voltage and provides the reference voltage to the reference voltage distributor; and a reference voltage compensator that provides current to an output terminal of the reference voltage generator for a predetermined period of time that corresponds to a delay characteristic of circuitry of the reference voltage compensator to compensate for a drop in the reference voltage in response to the output enable signal.