| 摘要 |
PURPOSE:To control various outputs through less input lines, by using an element which operates slowly, such as a relay, for a signal switching circuit. CONSTITUTION:When signals are supplied to input lines IL1-IL8, a flip-flop which inputs the outputs of ''NOT'' elements 25 and 26 and a flip-flop 30 which inputs the outputs of ''NOT'' elements 28 and 29 are set and reset to hold inputs A and B to decoders 48-56 at L and H. The output of an ''NOR'' element 31 and the output of an IC32 hold control terminals of tristate buffers 41-48 at H to hold their outputs at HZ, and they are pulled up by resistances R9-R16 to hold enable-inputs E to decoders 44-56 at H. |
