| 摘要 |
PURPOSE:To obtain a correct storage time without destructive operation by providing a selective non-destructive readout element possible for sequential selection and controlling the storage time with the readout element. CONSTITUTION:Optical charges are stored in photoelectric conversion elements 1-4, a transfer switch 5 is closed with the input from a transfer terminal 6, optical information is converted into a serial signal at an analog shift register 7 with a clock 8 and outputted to a terminal 10 via an amplifier 9. In this case, the clock from a terminal 11 is counted at a counter 12, the count value sequentially turns on a selecting switch 13, the amount of optical charge is read out at a terminal 16 with non-destruction at an FET14 and a resistor 15, and transferred just before the saturation of the maximum optical charge through the discrimination of the maximum value of the level. Thus, the correct storage time is obtained without destruction. When the signal is used as the detection of correlation, a selection address is latched to a latch 18 at a maximum value circuit 17 at maximum and outputted as the maximum value address at a terminal 19. |
