Charge pump

Details Charge pump Charge pump

1996-04-25

1997-04-29

Hecker, Stuart N.

Electric power conversion systems

Current conversion

With voltage multiplication means

363 60, 327536, H02M 318, H02M 700

Patent

active

056255446

ABSTRACT:
A charge pump circuit including N stages of diode-capacitor voltage multipliers clocked so as to convert a low voltage received from a supply voltage to a high voltage at an output terminal thereof employs an output stage to improve the efficiency of the charge pump. The output stage includes first and second legs each coupled to the output terminal, where the first leg provides current to the output terminal during low transitions of the clock signal and the second stage provides current to the output terminal during high transitions of the clock signal. In some embodiments, the numerous one of the above-mentioned charge pump circuit may be connected in parallel to achieve even greater output currents. Thus, unlike conventional charge pump circuits, a substantially constant current is provided to the output terminal throughout the period of the clock signal, thereby increasing the average total current provided to the output terminal and, thus, increasing the driving capability of the charge pump circuit.

REFERENCES:
patent: 5036229 (1991-07-01), Tran
patent: 5216588 (1993-06-01), Bajwa et al.
patent: 5280420 (1994-01-01), Rapp
patent: 5301097 (1994-04-01), McDaniel
patent: 5398001 (1995-03-01), Rapp
patent: 5559687 (1996-09-01), Nicollini et al.

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