Circuit for recharging the output nodes of field effect transist

Details Circuit for recharging the output nodes of field effect transist Circuit for recharging the output nodes of field effect transist

1979-01-15

1981-05-12

Dixon, Harold A.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307DIG3, 307279, H03K 500, H03K 326

Patent

active

042674654

ABSTRACT:
A recharging circuit is provided to maintain a high potential for a longer time interval at the output node of a FET driver circuit. The recharging circuit consists of a first FET which is made periodically conductive via a capacitor and periodically recharges a capacitance at the output node. This capacitance is first charged by a strong pulse of the driver circuit. A second FET is provided to prevent a current flow through the first FET and thus the generation of a power dissipating current when the output potential of the driver circuit is low. The gate of the second FET is connected to a supply voltage. Thus, the second FET is conductive when a low potential exists at the output node, transferring that potential to the gate of the first FET which, in turn, does not become conductive since its gate to source voltage is less than its threshold voltage.

REFERENCES:
patent: 3983545 (1976-09-01), Cordaro
patent: 4030081 (1977-06-01), Horninger
patent: 4112510 (1978-09-01), Baker

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