Output buffer user-programmable to function as CMOS output drive

Details Output buffer user-programmable to function as CMOS output drive Output buffer user-programmable to function as CMOS output drive

1992-02-05

1993-05-04

Hudspeth, David R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307443, 307451, 3072967, H03K 19094

Patent

active

052084922

ABSTRACT:
The improved CMOS output circuit has an enhancement-type PMOS and an enhancement-type NMOS connected in order between a power supply line and a reference potential line and that has the junction between the PMOS and the NMOS connected to an output terminal. The PMOS is such that a P-type region is provided in the back gate region to form a diode, with the back gate region being connected to the power supply line via the diode. A switch circuit is inserted between the gate of this PMOS and said junction or the output terminal. When a voltage higher than the voltage on the power supply line is applied to the output terminal, the applied voltage will turn on the switch circuit.

REFERENCES:
patent: 4223277 (1980-09-01), Taylor
patent: 4481432 (1984-11-01), Davies, Jr.
patent: 4593203 (1986-06-01), Iwahashi et al.
patent: 4593279 (1986-06-01), Leach et al.
patent: 4707623 (1987-11-01), Bismarck
patent: 4992679 (1991-02-01), Takata et al.

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