SWITCH-MODE POWER SUPPLY AND VOLTAGE SAMPLING CIRCUIT THEREOF
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United States of America Patent
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Nov 7, 2019
app pub date -
Dec 20, 2017
filing date -
Dec 29, 2016
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Abstract
A circuit comprises: a sampling and holding circuit and a control circuit. The sampling and holding circuit is used for sampling the voltage of a voltage sampling point in a sampling stage and holding the sampling voltage of the sampling output end after the sampling stage is ended. The control circuit is used for controlling the sampling and holding circuit to enter the sampling stage when judging that the voltage of the voltage sampling point is in a sampling voltage segment according to the voltage of the voltage sampling point, and controlling the sampling stage of the sampling and holding circuit to be ended when judging that the voltage of the voltage sampling point is in a voltage inflection point according to the voltage of the voltage sampling point and the sampling voltage of the sampling output end.
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