Charge pump circuit for a substrate voltage generator of a semic

Details Charge pump circuit for a substrate voltage generator of a semic Charge pump circuit for a substrate voltage generator of a semic

1993-03-30

1994-08-30

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072965, 3072968, H03K 301

Patent

active

053430883

ABSTRACT:
A charge pump circuit for a substrate voltage bias generator. The charge pump circuit generates a negative substrate bias voltage to a semiconductor substrate by performing a charge pumping operation twice during a clock cycle. Additional pumping capacitors are provided to prevent discharging of the substrate bias voltage to ground during transistor switching operations. The transistor switching provides the necessary charge pumping operations within the charge pumping circuit. This circuit provides increased charge pump efficiency and lower stand-by current than conventional charge pump circuits.

REFERENCES:
patent: 4403158 (1983-09-01), Slemmer
patent: 4742250 (1988-05-01), Tobita
patent: 4843256 (1989-06-01), Scade et al.
patent: 5126590 (1992-06-01), Chern
patent: 5140182 (1992-08-01), Ichimura
patent: 5157278 (1992-10-01), Min et al.
patent: 5196996 (1993-03-01), Oh
patent: 5202588 (1993-04-01), Matsuo et al.
patent: 5266842 (1993-11-01), Park

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