Input-output circuits
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United States of America Patent
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Jan 22, 2019
Grant Date -
Jan 11, 2018
app pub date -
Sep 20, 2017
filing date -
Nov 26, 2014
priority date (Note) -
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Abstract
A circuit includes a first circuit that operates at a first-circuit supply voltage value and generates at least one of a first reference voltage value or a second reference voltage value, based on a voltage rated for transistors in a second circuit. The second circuit operates at the first-circuit supply voltage value and receives a first signal and at least one of the first reference voltage value or the second reference voltage value. The first signal is configured to swing between a low voltage value and a high voltage value lower than the first-circuit supply voltage value. The second circuit keeps a voltage across two terminals of a first transistor in the second circuit below the voltage rated for the first transistor, based on the at least one of the first reference voltage value or the second voltage value.
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