Processing circuit having self-diagnosis function
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United States of America Patent
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Nov 24, 2015
Grant Date -
Oct 9, 2014
app pub date -
Apr 2, 2014
filing date -
Apr 3, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A processing circuit has an input terminal to which an input signal generated by an input signal generator is inputted via an input line. An external capacitor is connected to the input line in parallel with the processing circuit. The processing circuit includes a pulse circuit, at least one switch, a controller, a detector and a determiner. The pulse circuit generates a pulsed voltage having at least one pulse. The least one switch is provided between the pulse circuit and the input line. The controller controls the at least one switch so as to apply the pulsed voltage to the input line via a resistor. The detector detects a change in a voltage of the input line caused by application of the pulsed voltage to the input line. The determiner determines whether the processing circuit is in a normal or abnormal condition based on the change detected by the detector.
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