Device for processing output signals from a photo-diode
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United States of America Patent
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Nov 25, 2003
Grant Date -
Jul 17, 2003
app pub date -
Jan 11, 2002
filing date -
Jan 11, 2002
priority date (Note) -
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Abstract
A device for processing output signals from a photo-diode uses a comparative conversion circuit to convert an analog output signal generated from a photo-diode to a square wave digital signal; wherein, a reference circuit obtains a reference signal by capturing the analog output signal from the photo-diode, feeds it back to a feedback logic unit for timing the high or low electric potential based on the reference signal; when the low electric potential time is too long, the entire electric potential and the wave crest value time of the output signal are adjusted to make the final output square wave digital signal of the comparative conversion circuit acquire a symmetric wave correction.
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