※ 引述《BBSinPtt (Bulletin Board System)》之铭言： : 1.digital technology 相对於 analog technology 的优点 : 2.positive logic 与 negative logic 有哪些差异点 这是我查到的 Positive logic: Let +V represent a logic 1 and 0 volt (or -V) represent a logic 0. In other words, the higher of the two voltage levels represents a logic 1 and the lower of the two voltage levels represents a logic 0. Negative logic: Let +V represent a logic 0 and 0 volt (or -V) represent a logic 1. In other words, the lower of the two voltage levels represents a logic 1 and the higher of the two voltage levels represents a logic 0. 可是不知道他的意思 能解答一下吗 : 3.how is serial transmission of a digital word different from parallel : transmission.(他在问什麽??) : 谢谢 --

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