Charge pumping circuit used for a positive and negative charge p

Details Charge pumping circuit used for a positive and negative charge p Charge pumping circuit used for a positive and negative charge p

1997-12-29

1999-07-06

Hecker, Stuart N.

Electric power conversion systems

Current conversion

With voltage multiplication means

327536, H02M 318

Patent

active

059204702

ABSTRACT:
The present invention is to provide to a charge pumping circuit capable of reducing the area of the layout by making the positive and negative charge pump in a single circuit, of enhancing the efficiency of the pump and of making the pumping speed high with the high driving voltage. The charge pumping circuit comprises: a charge pump for generating voltage amplitude which is over Vdd; a positive charge pump for transferring positive charges from the charge pump in response to a first control signal; a negative charge pump for transferring negative charges from the charge pump in response to the first control signal; and a controller for making a voltage, which is applied to the negative charge pump, to a ground voltage level at a negative charge operation, and for providing a voltage level for the negative charge pump to prevent charges from flowing to the negative charge pump.

REFERENCES:
patent: 4807104 (1989-02-01), Floyd et al.
patent: 5081371 (1992-01-01), Wong
patent: 5086454 (1992-02-01), Hirzel
patent: 5262934 (1993-11-01), Price
patent: 5306954 (1994-04-01), Chan et al.
patent: 5606491 (1997-02-01), Ellis
patent: 5663907 (1997-09-01), Frayer et al.
patent: 5748032 (1998-05-01), Baek

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