From {HEAD ~ comparison} of {TAIL ~ the measured and expected values}, an offset voltage is generated and added to the CCD output signal 
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From { HEAD ~ comparison } of { TAIL ~ the measured and expected values } , an offset voltage is generated and added to the CCD output signal
OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH