Integrated high voltage generating system

Details Integrated high voltage generating system Integrated high voltage generating system

1988-05-20

1989-06-13

Wong, Peter S.

Electric power conversion systems

Current conversion

With voltage multiplication means

307110, H02J 1100, H02M 318

Patent

active

048397873

ABSTRACT:
This invention relates to an integrated high voltage generating system provided with a charge pump for raising the input power supply voltage sequentially while transferring the electric charges of the capacitors on a stage by stage basis, by serially connecting unit circuits composed of diode elements and capacitors, and supplying clock signals of mutually opposite phases to adjacent capacitors. Source and drain electrodes of a MOS transistor are connected between the first power supply output terminal and a second power supply output terminal, and the gate electrode of this MOS transistor is connected to the input end of any one of the unit circuits of the charge pump, wherein the voltage of the first power supply output terminal is stepped down depending on the voltage applied to the gate electrode of the MOS transistor, and is delivered to the second power supply output terminal. In this way, since the voltage is not stepped down using a dividing circuit, a potential between input power supply voltage and the first input power supply voltage can be obtained from the second power supply output terminal, without consuming unnecessary current and without causing the chip area to be increased.

REFERENCES:
patent: 3824447 (1974-07-01), Kuwabara
patent: 4186436 (1980-01-01), Ishiwatari
patent: 4636930 (1987-01-01), Bingham et al.
patent: 4734599 (1988-03-01), Bohac, Jr.

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