Semiconductor device and switching power supply device
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United States of America Patent
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Jan 9, 2018
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N/A
app pub date -
Nov 28, 2016
filing date -
Jan 13, 2016
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Abstract
A semiconductor device including a first filter, a second filter, a first comparison circuit, a second comparison circuit and an AND circuit. The first filter generates a first output signal by performing first filtering processing on an input signal of the semiconductor device, the first filter having a first time constant. The second filter generates a second output signal by performing second filtering processing on the first output signal, the second filter having a second time constant different from the first time constant. The first comparison circuit compares the first output signal with a first threshold voltage, to thereby output a first level signal. The second comparison circuit compares the second output signal with a second threshold voltage, to thereby output a second level signal. The AND circuit performs an AND operation on the first and second level signals.
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