Amplifiers – Signal feedback – Combined with control of bias voltage of signal amplifier
Patent
1989-03-20
1990-11-20
Mintel, William
Amplifiers
Signal feedback
Combined with control of bias voltage of signal amplifier
357 32, 357 36, 357 43, 357 34, 330 69, 330 59, 2505781, 250204, 250211R, H01L 2714
Patent
active
049722433
ABSTRACT:
A photoelectric conversion apparatus has a plurality of photoelectric conversion cells. Each cell includes a semiconductor transistor having a control electrode area which in turn includes a plurality of main electrode areas for reading signals. The potential of the control electrode area is controlled to store carriers produced by optical pumping in the control electrode area, to read, from the main electrode area, a signal controlled by the storage voltage produced due to the storage, and to perform a refreshing operation to nullify the carriers stored in the control electrode area. A device is provided for performing a peak detection on the basis of signals from the main electrode area. At least one of the photoelectric conversion cells is shielded from light. The peak detection device performs the peak detection by detecting the difference between a peak signal obtained on the basis of a signal from the photoelectric conversion cells and a dark signal from the photoelectric conversion cells shielded from light.
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Sugawa Shigetoshi
Suzuki Toshiji
Tanaka Nobuyoshi
Canon Kabushiki Kaisha
Mintel William
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