| 摘要 |
<p>PURPOSE:To give the wider allowance to a threshould level of the comparator and to improve reproducibility and fidelity by forming a comparator to convert picture data inputted from a television camera to a binary digital signal and a video refreshing memory by the feed-back circuit inserted between the comparator and the video refreshing memory. CONSTITUTION:While a switch 81 is pushed, an unstable data part in a video refreshing memory 3 is shifted to L when a switch 80 is at the A side, and the part is shifted to H when the switch 80 is at the B side. Thus, unstable data near the threshould level of a comparator 2 can be fixed to a H level or a L level, and stable picture data can be obtained. By adjusting the time to push the switch 81, different picture data of a degital converting level can be obtained, and therefore, the picture close to a display putpose can be easily obtained and the width of the expression range can be expanded.</p> |
