Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2009-01-27
2010-10-05
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S158000, C327S538000
Reexamination Certificate
active
07808306
ABSTRACT:
A power supply voltage control apparatus capable of freely setting a clock period setting margin according to a system clock frequency, and capable of converging power supply voltage to minimum power supply voltage where normal operation is possible in a short period of time without errors in operation of internal circuits in response to changes in the system clock frequency is provided. Power supply voltage control apparatus is provided with a first frequency-divider that frequency-divides the system clock at a first frequency-diving ratio, a second frequency-divider that frequency-divides an output of a voltage control oscillator at a second frequency-dividing ratio, a phase comparator/frequency comparator that carries out a phase comparison/frequency comparison on the respective output signals of the first and second frequency-dividers, and a controller. Frequency-dividing ratios of the first and second frequency-divider are set by a second controller according to an operation mode signal corresponding to the system clock frequency.
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Donovan Lincoln
Greenblum & Bernstein P.L.C.
Jager Ryan C
Panasonic Corporation
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