Maximum swing cascode circuit for a bipolar charge pump

Details Maximum swing cascode circuit for a bipolar charge pump Maximum swing cascode circuit for a bipolar charge pump

1991-05-09

1991-11-19

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072964, 307110, 363 60, H03K 301, H02M 318

Patent

active

050668714

ABSTRACT:
A maximum swing bipolar charge pump retains a cascode switching configuration for high breakdown. The charge pump includes a charge pump capacitor with a first plate connected to supply in the conventional manner. A first cascode-connected NPN transistor is utilized to switch the second plate of the pump capacitor to the supply. A second cascode-connected NPN transistor is utilized to switch the second plate of the pump capacitor close to ground. An additional bipolar biasing network holds the second NPN transistor out of heavy saturation when the second plate of the pump capacitor is switched close to ground, thereby preserving fast turn-off time and maximum voltage swing with the constraint of a bipolar cascode configuration.

REFERENCES:
patent: 3002114 (1961-09-01), Englund, Jr.
patent: 3240958 (1966-03-01), Kerios et al.
patent: 3867940 (1975-02-01), Schwalm et al.
patent: 3878450 (1975-04-01), Greatbatch
patent: 3944908 (1976-03-01), Oki
patent: 3962591 (1976-06-01), Popka
patent: 4291369 (1981-09-01), Hochstrate
patent: 34997832 (1976-12-01), Tanaka et al.

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