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US 6,856,525 B2Granted
Apparatus and method for controlling voltage regulator and power supply apparatus
AssigneeNEC Corporation
InventorMark Wallis
Life of this patent
Estimating the term…
Abstract
In a method for controlling a voltage regulator, first and second charge storage devices are switchably connected between a voltage source and the voltage regulator. The first storage device is switched into connection with the voltage source until the voltage on it reaches a predetermined level. The first storage device is disconnected from the voltage source and switched into connection with the second storage device and the voltage regulator until the voltage input to the voltage regulator falls below a predetermined level. The above operations are repeated.
Claims10
A power supply apparatus comprising:
- a power supply;
- a voltage regulator;
- first and second non-ferroelectric capacitors provided between said power supply and said voltage regulator in parallel to said power supply;
- a first switch provided between said power supply and said first capacitor to open or close in response to a first control signal;
- a second switch provided between said power supply and said second capacitor to open or close in response to a second control signal;
- and
- a control circuit which generates said first and second control signals to said first and second switches such that said second switch opens and then said first switch closes when a voltage of one of said first and second capacitors decreases to a first predetermined level, and such that said first switch opens and said second switch closes after a first predetermined time period from the closing said first switch,
- wherein the voltage regulator outputs a voltage, and
- wherein the control circuit comprises:
- a comparator;
- and
- a flip-flop connected to an output of said comparator.
9 more elements
Dependencies are inferred from the claim text.