Power supply voltage switching circuit capable of preventing current leakage
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United States of America Patent
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Jun 20, 2017
Grant Date -
Mar 16, 2017
app pub date -
Sep 9, 2016
filing date -
Sep 10, 2015
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Abstract
A power supply voltage switching circuit includes a power selecting module, a level shifting module, and a supply switching module. The power selecting module receives a first supply signal and a second supply signal, and outputs an intermediate supply signal according to the first supply signal and the second supply signal. The level shifting module receives the intermediate supply signal as a power supply, and generates a first shifted signal and a second shifted signal by shifting voltage levels of a first control signal and a second control signal respectively. The supply switching module receives the first supply signal and a third supply signal, and generates an output signal according to the first shifted signal, the second shifted signal, the first control signal, and the second control signal.
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