Voltage converting circuit and multiphase clock generating circu

Details Voltage converting circuit and multiphase clock generating circu Voltage converting circuit and multiphase clock generating circu

1993-09-02

1995-10-24

Wong, Peter S.

Electric power conversion systems

Current conversion

With voltage multiplication means

307110, H02M 318

Patent

active

054615577

ABSTRACT:
A voltage converting circuit of the charge pump step-up type includes a first circuit means for charging each of first and second capacitors with the voltage of a voltage source at a first timing. A second circuit operates to serially connect the charged first capacitor between a positive electrode of the voltage source and a positive voltage output terminal at a second timing so that a positive voltage which is a double of the voltage source voltage, is supplied from positive voltage output terminal. A third circuit operates to the charged first and second capacitors in series between a ground terminal and a negative voltage output terminal at a third timing so that a negative voltage which is a double of the voltage source voltage, is supplied from the negative voltage output terminal. Since the positive voltage and the negative voltage are generated independently of each other, a voltage variation on one of the positive and negative voltage output terminals caused by an external load causes no voltage variation on the other of the positive and negative voltage output terminals.

REFERENCES:
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patent: 4897774 (1990-01-01), Bingham et al.
patent: 4999761 (1991-03-01), Bingham et al.
patent: 5237209 (1993-08-01), Brewer
Journal of Japan Society of Electronics and Communication Engineers, "Analaysis of Fundamental Properties of Ideal Switched-Capacitor Power Supplies", F. Ueno et al. 84/4, vol. J67-C No. 4, pp. 424-425.
Ichirou Oota et al., "A Realization of . . . Using Switched-Capacitor Transformer and Its Analysis", J. of Japan Society of Electronics and Communication Eng., 83/8, vol. J66-C, No. 8, pp. 576-583.

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