Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2007-12-25
2007-12-25
Wells, Kenneth B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C363S060000
Reexamination Certificate
active
11252508
ABSTRACT:
A step-down voltage output circuit preventing: latch-up phenomenon in a load circuit for a period between a power-supply activation and complete start of a charge pump circuit; and rapid change of a substrate potential when a step-down voltage output is changed from ON to OFF. The step-down voltage output circuit has a timer circuit that operates depending on control signals and a timer period; a first N-channel MOS transistor in which a source is connected to a step-down voltage output terminal, a drain is connected to ground, a gate is connected to a power-supply voltage input terminal through a resistance; and a second N-channel MOS transistor in which a source is connected to the step-down voltage output terminal, a drain is connected to the gate of the first N-channel MOS transistor, and a gate is connected to an output terminal of the timer circuit.
REFERENCES:
patent: 5408140 (1995-04-01), Kawai et al.
patent: 6107863 (2000-08-01), Iwata
patent: 6970035 (2005-11-01), Tanimoto
patent: 2001/0011919 (2001-08-01), Tanimoto
patent: 2002/0167827 (2002-11-01), Umeda et al.
patent: 2004/0165407 (2004-08-01), Umeda et al.
patent: 2005/0046464 (2005-03-01), Kobayashi et al.
patent: 2006/0072696 (2006-04-01), Kobayashi et al.
patent: 3-230559 (1991-10-01), None
patent: 5-29360 (1993-02-01), None
patent: 6-150652 (1994-05-01), None
patent: 6-195971 (1994-07-01), None
patent: 7-078472 (1995-03-01), None
patent: 10-285911 (1998-10-01), None
patent: 2002-300769 (2002-10-01), None
Fujii Keiichi
Kakumoto Yasunobu
Kobayashi Taku
Nagasawa Toshinobu
Jager Ryan C.
Matsushita Electric - Industrial Co., Ltd.
RatnerPrestia
Wells Kenneth B.
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