Patent ID: 6522160
Filing Date: 2003-02-18
Classification: G01R,G11C,H03K

Abstract:
An input buffer, comprising:a first detector circuit adapted to receive an input signal, wherein a voltage magnitude of the input signal alternates between a first voltage level and a second voltage level, and wherein the first detector circuit is configured to produce a first signal having a magnitude indicative of the first voltage level; a second detector circuit adapted to receive the input signal and configured to produce a second signal having a magnitude indicative of the second voltage level; an average generator circuit adapted to receive the first and second signals and configured to use the magnitudes of the first and second signals to produce a third signal having a magnitude indicative of a third voltage level substantially mid way between the first voltage level and the second voltage level; and a differential amplifier adapted to receive the input signal, the third signal, a first power supply voltage, and a second power supply voltage, wherein the differential amplifier is configured to amplify a difference between the voltage magnitude of the input signal and the third voltage level in order to produce an output signal which alternates between the first and second power supply voltages.