Patent ID: 6900832

Claim:
A solid-state image pickup apparatus comprising: a mode setting circuit for allowing an operator to select desired one of a plurality of modes matching with a display format of a display which displays a video signal fed thereto; a clock generating circuit for generating a plurality of clocks including a first clock and a second clock higher in frequency than said first clock; a frequency selector for selecting either one of said first clock and said second clock in accordance with a mode fed from said mode setting circuit; an image pickup section including a plurality of photosensitive cells for transforming, by photoelectric transduction, light incident thereto from a scene to be picked up, said image pickup section picking up said scene and producing signal charges representative of said scene in accordance with an output of said frequency selector; a noise reducing circuit for reducing noise components included in a signal output from said image pickup section; a digitizing circuit for converting an output of said noise reducing circuit to a digital signal in accordance with said first clock, irrespective of which of said first and second clocks said frequency selector selects, an amount of the digital signal being substantially proportional to a ratio of said first clock to a clock outputted from said frequency selector; a signal processing circuit for processing an output of said digitizing circuit in a manner matching with picture display and/or recording; and a controller for controlling said clock generating circuit, said frequency selector, said image pickup section, said noise reducing circuit, said digitizing circuit, and said signal processing circuit; wherein said plurality of modes include a first mode in which said frequency selector outputs said first clock and a second mode in which said frequency selector outputs said second clock.