| 摘要 |
<p>PURPOSE:To make an artifact substantially quiet by putting AD converters in parallel operation with a time-division multiplex clock and switching clocks supplied to the AD converters for each frame of a video signal. CONSTITUTION:An analog video signal is inputted to two AD converters 1 and 2 in parallel and digital conversion is performed with mutually out-of-phase conversion clocks of a clock generator 3, etc., synchronized with the video signal. Then the outputs of the two AD converters 1 and 2 are inputted to a digital processing circuit as one continuous image data through a parallel- serial converter 4. A switching circuit 15 is driven by frames of the video signal to switch the two mutually out-of-phase conversion clocks generated by the clock generator 13. Consequently, the artifact due to the characteristic difference between the AD converters becomes substantially quiet.</p> |
