Charge pump

Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage

Reexamination Certificate

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Reexamination Certificate

active

07821326

ABSTRACT:
The present invention relates to a charge pump, which uses a chopper circuit or a clamp circuit coupled between a pump capacitor and an output capacitor for preventing a parasitic transistor produced by a switching mechanism from turning on. Thereby, the performance of the charge pump is improved effectively.

REFERENCES:
patent: 5589697 (1996-12-01), Smayling et al.
patent: 6501325 (2002-12-01), Meng
patent: 6535052 (2003-03-01), Myono
patent: 7030683 (2006-04-01), Pan et al.
patent: 7427891 (2008-09-01), Sakurai et al.
patent: 7466189 (2008-12-01), Sohara et al.
patent: 2009/0039947 (2009-02-01), Williams

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