| 摘要 |
PURPOSE:To reduce the number of signals and to shorten the time required for selection by receiving plural signals to be outputted from one of plural timing selection units and selecting one from among the signals for synchronization. CONSTITUTION:Timing extraction circuits 11-1 to 11-n extract the timing of the 1st to n-th input signals 10-1 to 10-n to be inputted through the 1st to n-th input terminals corresponding to the (n) channels CH-1 to CH-n, respectively and output the 1st to n-th extracted timing signals 12-1 to 12-n. A selection selector 13 receives the extracted timing signals 12-1 to 12-n and selects optional (m) signals (m<n) from among the signals and outputs timing signals 14-1 to 14-m through the 1st to m-th output terminals. In a timing synchronizing unit 2, a synchronizing selector 16 receives signals 15-1 to 15-m outputted from the selection timing unit and outputs the selection timing signal 17 as the synchronizing timing source. |
