| 摘要 |
PURPOSE:To execute efficiently the whole processing by executing focus detecting processing and exposure operating processing in time division by a reference time generating circuit. CONSTITUTION:A reference time generating circuit 100 outputs a reference clock to a TI terminal of a processing circuit 200, and the circuit 200 synchronizes with this clock and outputs an integration start signal to a driving circuit 300. The circuit 300 receives the signal of the circuit 200 and starts the integration of an integral type photodetector train 400, also sends an integration end signal to an interrupting INT terminal of the circuit 200 by monitoring whether the integral level has reached the end level or not, and when the INT terminal in ''1'', the integration of the element train 40 is not ended, and auto focus processing cannot be executed, therefore, the exposure is calculated by executing interruption. When the integration of the element train 400 is ended, a video signal is sent to the circuit 200 through an A/D converter 500, and the circuit 200 executes an operation processing, outputs FI information to an FI information displaying circuit 800, and outputs a motor driving signal to a motor driving circuit 600. |
