Patent ID: 6124738
Filing Date: 2000-09-26
Classification: H03K,H04L

Abstract:
An input buffer for a semiconductor device receiving as an external reference potential an arbitrarily potential between first and second potentials, and an external signal obtained by superposing a logic signal of a small amplitude on said external reference potential, comparing said external reference potential with said external signal and applying an internal signal in accordance with result of comparison to an internal circuitry, comprising:a potential converting circuit for converting said external reference potential to a predetermined potential and outputting the converted potential;a signal converting circuit for converting said external signal to a signal obtained by superposing a complementary signal of said logic signal with small amplitude on said predetermined potential and outputting the converted signal; anda comparing circuit for comparing an output potential of said potential converting circuit with an output signal of said signal converting circuit and outputting said internal signal based on a result of comparison.