...For example, if four flip-flop circuits are used, it becomes a 2 4 = hexadecimal counter, but if it is reset after 10 inputs, it becomes a commonly used decimal counter. It can also be used to make a reversible counter (up-down counter), since it can perform addition or subtraction depending on how the input is added and how the circuits are connected. Also, since it is possible to set any number before counting using the memory function, it is possible to make a preset counter for automatic control that subtracts from the input and stops and starts operation at a predetermined number. ... *Some of the terminology that refers to "reversible counters" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…例えばフリップフロップ回路を4個用いれば24=十六進計数器となるが,10回入力があったときリセットするようにすれば通常用いる十進計数器となる。入力の加え方と回路の結合法で加算も減算もできるので可逆計数器up‐down counterもできる。また記憶機能を用いて計数前に任意数をセットできるので,これから入力で減算し予定数で動作を停止,開始させる自動制御用のプリセットカウンターも作ることができる。… ※「可逆計数器」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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