| 摘要 |
An interline sensor is constructed using photocapacitors. The vertical shift register of the interline sensor is operated in a uniphase mode, i.e., holding one of the two phase ( phi 2) at a D.C. potential while fluctuating the other phase ( phi 1) between a voltage that is sufficiently above and below that D.C. potential to facilitate transfer of charge from one phase to the next. The uniphase mode is facilitated by a single electrode, an indium tin oxide electrode, that covers both the phase that is held at a constant D.C. potential and the photodetector having photocapacitor charges. The charges are transferred from the photocapacitors to the vertical shift register by a third level clock into ( phi 1) adjacent the photodetectors utilizing the same ITO electrode for phase 2 of both the vertical and horizontal CCD shift registers is also proposed. Furthermore, to avoid having to separate the ITO electrode into the photocapacitor gate and the phase 2 gate, it is proposed that no cut is made within the electrode and that the vertical register be operated in the uniphase mode. That is the ITO electrode is biased to voltage of about -5 volts. It is important that the photocapacitor accumulation potential be about -4 volts so that its surface remains accumulated at all times and thus the dark current remains low. The horizontal register can be operated in the standard two phase mode so that the electrical noise in the video signal is maintained at a low level.
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