Ring oscillator substrate bias generator with precharge voltage

Details Ring oscillator substrate bias generator with precharge voltage Ring oscillator substrate bias generator with precharge voltage

1984-09-17

1987-04-07

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307296R, H03B 524

Patent

active

046563695

ABSTRACT:
A generator circuit for producing a negative bias voltage on a substrate for a semiconductor device employs a multistage on-chip oscillator driving individul charge pump circuits for each stage. The oscillator may produce a frequency related to the value of the negative bias, using a feedback circuit. Each of the charge pump circuits includes a capacitor and an MOS diode coupled to the substrate and another diode coupled to the ground terminal of the supply.

REFERENCES:
patent: 4307333 (1981-12-01), Hargrove
patent: 4322675 (1982-03-01), Lee et al.
patent: 4388537 (1983-06-01), Kanuma
patent: 4438346 (1984-03-01), Chuang et al.
patent: 4450515 (1984-05-01), Takemae et al.
patent: 4503339 (1985-03-01), Tsuge et al.
patent: 4547682 (1985-10-01), Bialas, Jr. et al.
patent: 4581546 (1986-04-01), Allan
Harroun, "Substrate Bias Voltage Control", IBM T.D.B., vol. 22, No. 7, Dec. 1979, pp. 2691-2692.

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