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2000年上海同济大学数字电子技术考研真题.doc

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2000 年上海同济大学数字电子技术考研真题 一.给出你所知的门电路类型,画出它们的逻辑符号,说明输出与输入的逻辑关系、并写出 表达式。 _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________ 二.写出几种常用触发器的特性方程、画出时序图。不同触发器之间如何转换,请给出若干 实例。 _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________ 三.CMOS 数字集成电路与 TTL 数字集成电路各有何优点与 特点,为什么?请详细说明。 _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________ 四.脉冲数字电路中常用的 RC 电路有哪些,请分别画出电路图、说明特点及用途。若输入 信号为一方波、分别画出它 们的输出波形。 _______________________________________________________________________________
_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________ 五、 请化简下列函数∶ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 六.用七个开关(K.=L.7)控制一个电灯,当 K1、K3、K5 和 K7 闭合且 K2 断开,或 K2、K4、和 K6 闭合且 K3 断开 时,灯亮。用门电路设计此控制线路。 _______________________________________________________________________________ _______________________________________________________________________________
_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 七.设计一信号检测器。当输入出现"101"序列时输出为 1,其它情况输出均为 0。 _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________
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