Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1996-08-28
1998-11-03
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327537, 327589, G05F 110
Patent
active
058314709
ABSTRACT:
A high-efficiency charge pumping circuit includes an oscillator for generating a predetermined cycle of pulse voltage; a first booster capacitor unit for storing an output of the oscillator at a high level, and outputting an output when the output of the oscillator is at a low level; a first clamp unit for maintaining the output of the first booster capacitor unit at a predetermined level; a second clamp unit for maintaining the output of the first booster capacitor unit at a predetermined level; a double-booster circuit for performing a double-boosting of an output signal of the oscillator and then outputting the double-boosted output signal as an output of the double-booster circuit; a second booster capacitor unit for temporarily storing an output voltage of the double-boosted circuit and for outputting the temporarily stored voltage to the second clamp unit; an output transistor for receiving a voltage greater than a predetermined level from the double-booster circuit, and for completely outputting a voltage input from the first clamp unit; a voltage holding transistor for receiving an internal voltage, and for outputting a voltage signal to an output node; a clipper for interrupting a threshold voltage of the output transistor when a voltage of the output transistor is above a predetermined voltage; and a storage capacitor for temporarily storing a voltage of the voltage holding transistor.
REFERENCES:
patent: 5039325 (1991-08-01), Miller et al.
patent: 5126590 (1992-06-01), Chern
patent: 5253204 (1993-10-01), Hatakeyama et al.
patent: 5267201 (1993-11-01), Foss et al.
patent: 5337284 (1994-08-01), Cordoba et al.
patent: 5367489 (1994-11-01), Park et al.
patent: 5412257 (1995-05-01), Cordoba et al.
patent: 5511026 (1996-04-01), Cleveland et al.
patent: 5621348 (1997-04-01), Furutani et al.
Kim Tae Hoon
Park Jin Suog
Callahan Timothy P.
Kim Jung Ho
LG Semicon Co., Ltd
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