Drive control circuit, and ignition device for internal combustion engine
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United States of America Patent
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Mar 20, 2018
Grant Date -
Mar 3, 2016
app pub date -
Apr 15, 2014
filing date -
Apr 16, 2013
priority date (Note) -
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Abstract
A drive control circuit includes: a first protection circuit connected between a signal input line and a ground line and clamps a voltage of AC noise superimposed on the signal input line at one clamp level; a second protection circuit connected between the signal input line and the ground line and clamps the voltage of the AC noise superimposed on the signal input line at an other clamp level; and a drive signal generation circuit generating the drive signal based on a comparison between a voltage in the signal input line and Vt. The input signal has binary levels including an L-level voltage VL and an H-level voltage VH, and a mean voltage of the AC noise is lower than a differential voltage between Vt and VL and higher than a differential voltage between Vt and VH.
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