Power switching circuit, semiconductor integrated circuit, radio apparatus, radio system, and power switching method

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United States of America Patent

PATENT NO 9812894
SERIAL NO

14658946

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Abstract

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A power switching circuit includes a current mirror circuit to generate mirror currents, by transferring, at different mirror ratios, monitored currents that are obtained by monitoring power supply voltages, a selector to select the mirror currents with a combination having the different mirror ratios for the monitored currents, according to a switching state of the power supply voltages, a comparator to compare the mirror currents selected by the selector and output a comparison result, and a switching circuit to switch a supply voltage to be supplied to a load to one of the power supply voltages, based on the comparison result.

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Patent Owner(s)

  • FUJITSU SEMICONDUCTOR LIMITED

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Yamada, Satoshi Kawasaki, JP 284 3474

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