Bias-voltage generator

Details Bias-voltage generator Bias-voltage generator

H - Electricity

03

K

328/200

H03K 17/687 (2006.01) G05F 3/20 (2006.01) H01L 27/02 (2006.01)

Patent

CA 1154834

- 15 - BIAS-VOLTAGE GENERATOR ABSTRACT OF THE DISCLOSURE A bias-voltage generator is disclosed. The bias- voltage generator is comprised of an oscillator, a charge pumping circuit which absorbs electric charges, accmulated in the semiconductor substrate, by cooperating with the oscillator, via a coupling capacitor. The oscillator contains therein a means for varying the oscillating frequency thereof in accordance with the variation of the voltage level of the semiconductor substrate. Said means is preferably comprised of a CR circuit fabricated by a variable resistor (R) and a capacitor (C). The variable resistor is made of a MOSFET. The gate electrode of the MOSFET is directly connected to the semiconductor substrate.

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