Charge pumping circuit using non-overlapping clock control

Details Charge pumping circuit using non-overlapping clock control Charge pumping circuit using non-overlapping clock control

1994-06-27

1995-11-21

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327306, G05F 110

Patent

active

054691109

ABSTRACT:
A charge pumping circuit generates a negative voltage equal in magnitude to the positive supply voltage. A non-overlapping clock is used to set the voltage across a first capacitor equal to the positive supply voltage through a MOS switch. This stored voltage is then transferred to a second capacitor through a second MOS switch to generate a negative voltage at one terminal of the second MOS switch. The use of MOS switches eliminates the threshold voltage drop if MOS diodes were used to charge the first capacitor or to transfer the voltage from the first capacitor to the second capacitor.

REFERENCES:
patent: 4809152 (1989-02-01), Bingham et al.
patent: 5095223 (1992-03-01), Thomas
patent: 5237209 (1993-08-01), Brewer
patent: 5306954 (1994-04-01), Chan et al.
patent: 5341031 (1994-08-01), Kinoshita et al.

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