Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2008-12-11
2010-11-23
Zweizig, Jeffrey S (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S534000
Reexamination Certificate
active
07839205
ABSTRACT:
A step-down circuit is connected between a power supply node for supplying a supply voltage and an internal power supply line for supplying a power to the object circuit and steps-down the supply voltage, and supplies the stepped-down voltage to the object circuit through the internal power supply line. The step-down circuit includes a comparison circuit that compares a reference voltage with the voltage of the internal power supply line, and a driver that adjusts a current flowing between the internal power supply line and the power supply node according to the comparison result of the comparison circuit. The activity level of the driver is controlled so as to rise in a predetermined rising period synchronously with an activated operation of the object circuit and to fall in a predetermined falling period that comes after the rising period.
REFERENCES:
patent: 5073484 (1991-12-01), Swanson et al.
patent: 6326837 (2001-12-01), Matano
patent: 6833748 (2004-12-01), Cho
patent: 7436206 (2008-10-01), Kurotsu
patent: 2000-57764 (2000-02-01), None
McGinn Intellectual Property Law Group PLLC
NEC Electronics Corporation
Zweizig Jeffrey S
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