CMOS output circuit using a low threshold device

Details CMOS output circuit using a low threshold device CMOS output circuit using a low threshold device

1989-12-21

1991-10-15

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072021, 307443, 307571, 307585, 307270, H03K 19094, H03K 1716, H03K 17687, H01H 3776

Patent

active

050577158

ABSTRACT:
A CMOS output driver includes an n-channel low threshold device in series between a p-channel transistor and an output terminal. Under normal driver operation, the low threshold transistor drops essentially zero volts and is imperceptible in the circuit. However, under special mode conditions when high voltage is applied to the output terminal, the low threshold transistor stops conducting when the output terminal approaches Vcc, so that any further increase in the voltage at the output terminal cannot be applied to the drain of the p-channel transistor which can cause its failure.

REFERENCES:
patent: 4223277 (1980-09-01), Taylor et al.
patent: 4274014 (1981-06-01), Schade Jr.
patent: 4384220 (1983-05-01), Segawa et al.
patent: 4481705 (1984-11-01), Haskell
patent: 4717847 (1988-01-01), Nolan
patent: 4780626 (1988-10-01), Guerin et al.
patent: 4857763 (1989-08-01), Sakurai et al.
Joannopoulos et al., "The Physics of Hydrogenated Amorphous Silicon I, Structure, Preparation, and Devices", 1984, pp. 83-89.

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