Negative voltage generator for a semiconductor memory device

Details Negative voltage generator for a semiconductor memory device Negative voltage generator for a semiconductor memory device

2006-04-04

2006-04-04

Cunningham, Terry D. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C323S313000

Reexamination Certificate

active

07023262

ABSTRACT:
A negative voltage generator is controlled responsive to a word line precharge signal. Voltage fluctuations in a negatively biased word line scheme are reduced by using a kicker circuit to provide a predetermined amount of negative charge to shut off a word line during a precharge operation. The negative voltage generator includes first and second negative charge pumps. The second charge pump is activated responsive to the word line precharge signal. A negative voltage regulator can be used to regulate a negative voltage signal. A level shifter uses two voltage dividers and a differential amplifier to reduce response time, output ripple, and sensitivity to process and temperature variations. A negative voltage regulator cancels ripple from a charge pump to provide a stable negative bias voltage and reduce the amount of charge needed to precharge a word line.

REFERENCES:
patent: 4961007 (1990-10-01), Kumanoya et al.
patent: 5191235 (1993-03-01), Hara
patent: 5329168 (1994-07-01), Sugibayashi et al.
patent: 5337284 (1994-08-01), Cordoba et al.
patent: 5396114 (1995-03-01), Lee et al.
patent: 5434820 (1995-07-01), Kim
patent: 5451891 (1995-09-01), Tanabe
patent: 5553295 (1996-09-01), Pantelakis et al.
patent: 5600551 (1997-02-01), Luscher
patent: 5694072 (1997-12-01), Hsiao et al.
patent: 5708420 (1998-01-01), Drouot
patent: 5933047 (1999-08-01), Zhu et al.
patent: 6008674 (1999-12-01), Wada et al.
patent: 6031411 (2000-02-01), Tsay et al.
patent: 6052022 (2000-04-01), Lee
patent: 6055186 (2000-04-01), Hung et al.
patent: 6097665 (2000-08-01), Tomishima et al.
patent: 6147914 (2000-11-01), Leung et al.
patent: 6198341 (2001-03-01), Ryu
patent: 6205079 (2001-03-01), Namekawa
patent: 6239650 (2001-05-01), Tsay et al.
patent: 6256229 (2001-07-01), Roohparvar
patent: 6288951 (2001-09-01), Chen et al.
patent: 6329869 (2001-12-01), Matano
patent: 6333662 (2001-12-01), Umezawa et al.
patent: 6456513 (2002-09-01), Saito
patent: 6486727 (2002-11-01), Kwong
patent: 2002/0011893 (2002-01-01), Takai
patent: 1996-0009155 (1996-03-01), None
English language abstract of the Japanese Publication No. 1996-0009155.

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