Circuit for holding a MOS transistor in a conduction state in a

Details Circuit for holding a MOS transistor in a conduction state in a Circuit for holding a MOS transistor in a conduction state in a

1988-12-12

1990-04-03

James, Andrew J.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072961, 3072964, 307571, 365229, H03K 1756, H03K 301

Patent

active

049143166

ABSTRACT:
A circuit for holding a MOS power transistor in a conduction state on the occurrence of an outage in the voltage supply, being of a type which comprises a first MOS transistor having its source connected to a line of the voltage supply and its drain connected to the gate of the power transistor, further comprises a diode connected between the drain of the first transistor and the gate of the power transistor, and a second transistor of the MOS type having its gate connected to the gate of the first transistor drain connected to the gate of the power transistor. The circuit prevents the gate capacitance of the power transistor from becoming discharged on a failure of the voltage supply, thus holding that transistor in a conducting state.

REFERENCES:
patent: 3700968 (1972-10-01), Spies
patent: 4143286 (1979-03-01), Koike et al.
patent: 4317056 (1982-02-01), Alberts
patent: 4322634 (1982-03-01), Kaire et al.
patent: 4663547 (1987-05-01), Baliga et al.

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