Coded data generation or conversion – Converter calibration or testing
Reexamination Certificate
2006-03-07
2006-03-07
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Converter calibration or testing
C341S118000
Reexamination Certificate
active
07009537
ABSTRACT:
An apparatus for detecting an abnormality in an A/D converter has a voltage accumulating capacitor. The apparatus includes a storage circuit which receives analog signals whose range of signal operation voltage when normal is limited to be narrower than the range of input operation voltages, and stores in advance the range of abnormal voltages of digital signals converted by the A/D converter, and determines the A/D converter to be abnormal when the digital signal voltage lies in the range of abnormal voltages. The A/D converter converts the analog signal voltage into a digital signal voltage, and then initializes the analog signal voltage of the capacitor to a voltage in the abnormal voltage range.
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Denso Corporation
Harness Dickey & Pierce PLC
Jean-Pierre Peguy
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