Patent ID: 7512019

Claim:
An input buffer having a differential amplifier, and having an input terminal and an output terminal, the input buffer comprising: a buffer circuit having an input coupled to receive an input signal from the input terminal of the input buffer, the input signal including first and second complimentary input signals and being received by the differential amplifier, the buffer circuit being operable to generate an output signal corresponding to the input signal and to couple the output signal to the output terminal of the input buffer, the buffer circuit comprising: first and second pass gates having respective signal outputs, control inputs and signal inputs, the signal inputs being coupled to receive the input signal from the input terminal of the input buffer; a pass gate control circuit coupled to the control inputs of the pass gates, the pass gate control circuit being coupled to receive the output signal of the buffer circuit and being operable make the first pass gate conductive and the second pass gate nonconductive responsive to an output signal having a first logic level and being operable make the first pass gate nonconductive and the second pass gate conductive and responsive to an output signal having a second logic level; a first drive circuit having an input coupled to the output of the first pass gate, the first drive circuit being operable to drive the output signal to the second logic level responsive to the input signal coupled through the first pass gate having a corresponding logic level; and a second drive circuit having an input coupled to the output of the second pass gate, the second drive circuit being operable to drive the output signal to the first logic level responsive to the input signal coupled through the first pass gate having a corresponding logic level; and a feedback circuit having an output and an input coupled to the buffer circuit, the feedback circuit initially coupling a positive feedback signal to the buffer circuit responsive to each transition of the input signal and thereafter terminating the coupling of the positive feedback to buffer circuit before a subsequent transition of the input signal.