CMOS output circuit with open drain transistor

Details CMOS output circuit with open drain transistor CMOS output circuit with open drain transistor

1993-09-01

1995-05-09

Hudspeth, David R.

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

326 68, 326 83, 326 58, H03K 1716, H03K 190175

Patent

active

054143756

ABSTRACT:
A semiconductor integrated circuit having a complementary MOS structure, comprises an output buffer control portion of a complementary MOS inverter structure for inputting a logical output of an internal logic circuit, an output buffering MOS transistor of a first conductive type for receiving output of the output buffer control portion as a gate input and externally outputting a logical output, and level shifting means for causing level shift of a source potential of a second conductive type MOS transistor to be lower than a power source potential in a magnitude corresponding to a threshold value of the second conductive type MOS transistor.

REFERENCES:
patent: 4707625 (1987-11-01), Yanagisawa
patent: 4827159 (1989-05-01), Naganuma
patent: 4947063 (1990-08-01), O'Shaughnessy et al.
patent: 4972100 (1990-11-01), Lim et al.
patent: 5122691 (1992-06-01), Balakrishnan

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