Dual back-bias voltage generating circuit with switched outputs

Details Dual back-bias voltage generating circuit with switched outputs Dual back-bias voltage generating circuit with switched outputs

1992-12-23

1995-08-22

Pellinen, A. D.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

327536, 327538, G05F 316, H03K 301

Patent

active

054443628

ABSTRACT:
A back-bias voltage generating circuit of a semiconductor device having a driving signal generating portion for receiving oscillating signals from an oscillator such as a ring oscillator and generating alternating high and low driving signals, a first pumping portion for charging the input driving signal at one electrode of a pumping capacitor so as to produce a voltage at the other electrode of the pumping capacitor lower than a back-bias voltage, a second pumping portion for charging another input driving signal at one electrode of a second pumping capacitor so as to produce a voltage at the other electrode of the second pumping capacitor lower than a back-bias voltage, a first switching portion being turned on by a voltage higher than a back-bias voltage and connecting the other electrode of the pumping capacitor to a back-bias voltage terminal when the voltage of this electrode is below the back-bias voltage, and a second switching portion being turned on by a voltage higher than a back-bias voltage and connecting the other electrode of the second pumping capacitor to a back-bias voltage terminal when the voltage of the second pumping portion is below the back-bias voltage.

REFERENCES:
patent: 4740715 (1988-04-01), Okada
patent: 4810952 (1989-03-01), Cohen
patent: 4961007 (1990-10-01), Kumanoya et al.
patent: 5072134 (1991-12-01), Min
patent: 5172013 (1992-12-01), Matsumura

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