Schottky enhanced CMOS output circuit

摘要

The high impedance state of a tri-state CMOS transistor output circuit is enhanced by serially connecting first and second Schottky diodes with the P-channel transistor and the N-channel transistor whereby in the high impedance state reverse bias of the substrate/source-drain diodes of the two transistors is prevented when the output of the circuit is taken beyond the supply voltage potentials of the output circuit.