Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1990-10-29
1992-04-21
Nelms, David C.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307451, 307473, 307475, 307570, H03K 1901, H03K 19094, H03K 19082, H03K 19017
Patent
active
051071428
ABSTRACT:
A tristate driver circuit including a first output transistor for furnishing a first output voltage at an output terminal in the on condition, the first transistor being susceptible to disablement or degraded operation from back biasing in the presence of voltages above a particular level at the output terminal in the off condition, a second output transistor for furnishing a second output voltage at the output terminal in the on condition, apparatus for biasing the first and second transistors to allow operation thereof in the presence of enable signals and to disable operation in the absence of enable signals, and apparatus for eliminating back biasing of the first transistor in the absence of enable signals.
REFERENCES:
patent: 4649294 (1987-03-01), McLaughlin
patent: 4703203 (1987-10-01), Gallup et al.
patent: 4746817 (1988-05-01), Banker et al.
patent: 4791320 (1988-12-01), Kawata et al.
patent: 4804868 (1989-02-01), Masuda et al.
patent: 4804869 (1989-02-01), Masuda et al.
patent: 5006732 (1991-04-01), Nakamura
Bertelson David R.
Nelms David C.
Sun Microsystems Inc.
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