Multi-bootstrap driver circuit

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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307208, 307209, 307264, 307294, 307DIG4, H03K 1710, H03K 458, H03K 1728, H03K 1940

Patent

active

040499790

ABSTRACT:
Plural bootstrap capacitors are coupled to an output stage of a MOSFET driver. A conventional bootstrap driver is preceded by one or more additional bootstrap stages. Each one includes a capacitor, a tri state inverter and a delay section. When the output stage is off all capacitors are discharged. To turn the output stage on, all capacitors, including the output gate capacitance, are charged in parallel. Then each capacitor in turn is caused to pump its charge into the gate of the output stage, with the last capacitor pumping the output stage gate voltage to a level well in excess of the applied power supply voltage.

REFERENCES:
patent: 3889135 (1975-06-01), Nomiya et al.
patent: 3937983 (1976-02-01), Reed
patent: 3946245 (1976-03-01), McClaughry
patent: 3988617 (1976-10-01), Price
Balasubramanian et al., "Enhance/Deplete Push-Pull Driver", IBM Tech. Discl. Bull., vol. 18, No. 2, pp. 465-466, 7/1975.

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