Integrated logic circuit with protector transistor

Details Integrated logic circuit with protector transistor Integrated logic circuit with protector transistor

1989-01-10

1990-10-30

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307451, 307548, 307264, H03K 1704

Patent

active

049671030

ABSTRACT:
The invention relates to an additional transistor which is connected in cascode with a sub-circuit of a logic circuit in order to protect further transistors of the sub-circuit against hot carrier stress and hot carrier degradation. In a logic circuit having transistors of a first conductivity type, an additional transistor of the second conductivity type is arranged in cascode. This additional transistor is connected as a diode or as a current source in dependence on an output voltage of the circuit. Further aspects of the invention concern the switching means for switching the additional transistor and the location where the additional transistor is to be inserted.

REFERENCES:
patent: 4178620 (1979-12-01), Yu
patent: 4612466 (1986-09-01), Stewart
patent: 4736117 (1988-04-01), Wieser
patent: 4767950 (1988-08-01), Schrenk

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