Semiconductor device

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United States of America Patent

PATENT NO 9184760
APP PUB NO 20150084796A1
SERIAL NO

14560980

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Abstract

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A semiconductor device using analog-to digital (AD) conversion realizes reliable control so that, at the time of AD converting reference voltage, a low-voltage transistor in a reference voltage generating circuit is not destroyed by voltage held in a sample and hold circuit. In a semiconductor device, when an instruction of detecting a reference voltage value is received, a switch control unit controlling switching of an input signal of an internal AD converter temporarily automatically couples an input node of a sample and hold circuit and a ground node and, after that, couples the input node of the sample and hold circuit and an output node of a reference voltage generating circuit.

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Patent Owner(s)

  • RENESAS ELECTRONICS CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Masuda, Takaya Kanagawa, JP 46 126

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