Charge pump circuit for intermediate voltage between power suppl

Details Charge pump circuit for intermediate voltage between power suppl Charge pump circuit for intermediate voltage between power suppl

1993-02-24

1994-08-16

Sterrett, Jeffrey L.

Electric power conversion systems

Current conversion

With voltage multiplication means

363 60, H02M 307

Patent

active

053392361

ABSTRACT:
A charge pump circuit includes a charge supplying capacitor, a constant voltage circuit such as a diode, and first and second switches serially arranged between a power supply terminal V.sub.DD and a ground terminal. When the first and second switches are turned ON, a voltage across the charge supplying capacitor is V.sub.DD -.DELTA. V, where .DELTA. V is a level shift amount produced by the constant voltage circuit. Also, the charge supplying capacitor is associated with third and fourth switches and they are serially arranged between the ground terminal and an output terminal. When the third and fourth switches are turned ON, the voltage across the charge supplying capacitor plus V.sub.DD, i.e., 2 V.sub.DD -.DELTA. V, is transferred to the output terminal.

REFERENCES:
patent: 4807104 (1989-02-01), Floyd et al.
patent: 4812961 (1989-03-01), Essaff et al.
patent: 4999761 (1991-03-01), Bingham et al.
patent: 5066871 (1991-11-01), Wilcox

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