Electric power conversion systems – Current conversion – With voltage multiplication means
Patent
1998-02-10
1999-08-24
Riley, Shawn
Electric power conversion systems
Current conversion
With voltage multiplication means
327537, H02M 318
Patent
active
059432268
ABSTRACT:
A charge pump circuit is provided that includes a clock signal generator for generating a first and second clock signals respectively having a Vdd (a precharge voltage) level, and a third and fourth clock signals having 2Vdd levels (twice the precharge voltage) and phases substantially identical to the first and second clock signals. A precharge voltage output unit outputs a Vdd level of precharge voltage. A precharge pumping unit alternately performs a pumping operation and a precharging operation using a first pumping stage and a second pumping stage that function symmetrically to each other with regard to a precharge voltage outputted from the precharge voltage output unit in accordance with the first to fourth clock signals. The charge pump circuit alternatively performs the pumping operation and the precharge operation to improve pumping efficiency. In addition, the charge pump circuit has a less complex composition.
REFERENCES:
patent: 5126590 (1992-06-01), Chern
patent: 5381051 (1995-01-01), Morton
patent: 5422586 (1995-06-01), Tedrow et al.
Whitters, Johan S., Groeseneken, Guido and Maes, Herman E., "Analysis and modeling of ON-Chip high-voltage generator circuits for use in EEPROM circuits," IEEE Journal of Solid-State Circuits, vol. 24, No. 5 (Oct. 1989). pp. 1372-1379.
LG Semicon Co. Ltd.
Riley Shawn
LandOfFree
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