Abstract: A capacitor coupled circuit includes a power supply switch for switching power supply on; a coupling capacitor provided in a signal line; and a control circuit arranged to cause the capacitor to be charged or to be discharged in a short period of time according to the operation of the power supply switch. The arrangement enables the capacitor coupled circuit to obtain a stabilized constant output voltage in a short period of time after the power supply is switched on.

Abstract: The disclosed image sensing device includes a sensing arrangement for converting an optical image into an electrical signal; an iris for adjusting the quantity of light supplied to the image sensing arrangement; gain control circuits for adjusting amplification gains of monochrome or color difference signals obtained from the image sensing arrangement; a peak detecting arrangement for detecting the peak values of the monochrome or color difference signals; a balance control for controlling the gain control circuits for white balance adjustment according to the signals obtained from the peak detecting arrangement; and an iris control for controlling the iris such that the output of the image sensing arrangement becomes lower when the gain control circuits are under the control of the balance control than when they are under a normal photographic condition.

Abstract: An image pickup device for picking up an image of a subject by using a solid-state image pickup array having a number of photo-electric conversion cells arranged in a matrix is disclosed a selector for selecting a first mode in which signal charges of at least two of the photo-electric conversion cells are combinationally read and a second mode in which the signal charges are read separately for each of the photo-electric conversion cells is provided, and an amplification factor for the read signal is varied in accordance with the mode selected.

Abstract: Disclosed is an image pick-up device which uses a charge transfer type solid state image pick-up device, and a shutter so as to form a high quality picture signal in which smear is prevented by prohibiting the incidence of the light on the device while the charge is transferred in the device. The device is driven by a clock signal for still photography in order to assure high quality picture information for one frame. The photographic parameters are automatically changed or the monitor is changed between the motion picture photography mode and the still photographing mode.