Three-state complementary MOS integrated circuit

摘要

In a three-state complementary MOS integrated circuit having an output circuit comprising a P-channel MOS transistor and an N-channel MOS transistor, part of a pre-output stage circuit between the gate inputs of the P-channel MOS transistor and the N-channel MOS transistor of the output circuit comprises a parallel circuit of a first series circuit and a second series circuit, each of the first series circuits comprising a P-channel MOS transistor to which the control signal is applied and an N-channel MOS transistor to which the in inverted control signal is applied. When the control signal and the inverted control signal are at the same potential, either the P-channel MOS transistors or the N-channel MOS transistors of the parallel circuit are off. Accordingly totempole current through the pre-output stage circuit is avoided.