题目内容
对于与非门,闲置输入端可通过上拉电阻接正电源,也可和已用的输入端并联使用。
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TTL与非门电路不用的输入端可以悬空,悬空时,相当于逻辑“1”电平。
CMOS 门电路与 TTL相比，其突出优点为：微功耗、抗干扰能力强。
CMOS电路主要元件是三极管。
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