Substrate bias voltage generator circuit

Details Substrate bias voltage generator circuit Substrate bias voltage generator circuit

1992-04-08

1993-09-07

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307600, 307603, 307578, 307264, H03K 301, H03K 17687

Patent

active

052432289

ABSTRACT:
A substrate bias voltage generator circuit has a substrate bias voltage detector circuit, a substrate bias driver circuit, and a charge pump circuit. the substrate bias voltage detector circuit detects a substrate bias voltage applied to a semiconductor substrate and outputs a substrate bias voltage detection signal. The substrate bias detector circuit includes a P-channel transistor with a gate terminal and an N-channel transistor with a substrate terminal, both terminals being connected to the semiconductor substrate and the substrate bias voltage which is a back bias for the N-channel transistor. The substrate bias driver circuit is responsive to the substrate bias voltage detection signal outputted from the substrate bias voltage detector circuit, and outputs a drive signal when the absolute value of the substrate bias voltage is equal to or smaller than a predetermined value, and stops outputting the drive signal when the absolute value of the substrate bias voltage is larger than the predetermined value. The charge pump circuit is responsive to the drive signal from the substrate bias driver circuit, and generates the substrate bias voltage.

REFERENCES:
patent: 4820936 (1989-04-01), Veendrick et al.
patent: 5122680 (1992-06-01), Stakely et al.
Frantz et al. IBM Tech. Disc. Bul. "MOSFET Substrate Bias-Voltage Generator" vol. 11, No. 10 Mar. 1969.
IBM Tech. Disc. Bul. "Charging Circuit for a Substrate Generator Pump Capacitor" vol. 27 No. 12 May 1985.

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