| 摘要 |
An electronic endoscope apparatus comprises an endoscope and a video processor unit. The video processor unit includes a drive pulse generator for generating vertical drive pulses, a power supply for generating a +16 V power supply voltage, and a video processor for sampling and holding an input image signal. The endoscope includes an insertion portion which incorporates a solid-state image sensing element using a CCD at its distal end portion, a manipulator portion, and a universal cord for connecting an electronic endoscope body to the video processor unit. An integrated circuit unit is incorporated near the solid-state image sensing element at the distal end portion of insertion portion. The integrated circuit unit includes voltage dividing resistors for voltage dividing a +16 V power supply voltage supplied from the power supply of the video processor unit into +8 V, +7 V, and +3 V power supply voltages, and emitter follower transistors connected between these power supply voltages and the power supply voltage terminals of the solid-state image sensing element. A delay line is incorporated in the manipulator portion. The delay line delays horizontal drive pulses generated from the video processor unit in accordance with a signal transmission delay time between the solid-state image sensing element and the video processor unit so that the timing of the image signal can always be matched with that of sample-and-hold pulses upon a sample-and-hold operation in the video processor unit.
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