[考研类试卷]模拟电子技术基础模拟试卷3及答案与解析.doc

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1、模拟电子技术基础模拟试卷 3 及答案与解析一、单项选择题下列各题的备选答案中,只有一个是符合题意的。1 半导体二极管的重要特性之一是_。(A)温度稳定性 (B)单向导电性(C)放大作用(D)滤波特性2 在由 NPN 型 BJT 组成的单管共发射极放大电路中,如静态工作点过高,容易产生_失真。(A)截止失真(B)饱和失真(C)双向失真(D)线性失真3 多级放大电路与组成它的任何一个单级放大电路相比,通频带_。(A)变宽(B)变窄(C)不变(D)与单级放大电路无关4 电流源电路的特点是输出电流恒定,交流等效电阻_。(A)等于零(B)比直流等效电阻小(C)等于直流等效电阻(D)远远大于直流等效电阻5

2、 放大电路产生零点漂移的主要原因是_。(A)采用了直接耦合方式(B)采用了阻容耦合方式(C)采用了正、负双电源供电(D)增益太大6 二阶压控电压源低通有源滤波器通带外幅频响应曲线的斜率为_。(A)20 dB十倍频程(B) -20 dB十倍频程(C) 40 dB 十倍频程(D)-40 dB十倍频程7 当有用信号的频率低于 100 Hz 时,应采用_滤波电路。(A)低通(B)高通(C)带通(D)带阻8 (A)40 mA(B) 45 mA (C) 55 mA(D)60 mA二、解答题9 10 11 12 13 14 模拟电子技术基础模拟试卷 3 答案与解析一、单项选择题下列各题的备选答案中,只有一个是符合题意的。1 【正确答案】 B2 【正确答案】 B3 【正确答案】 B4 【正确答案】 D5 【正确答案】 A6 【正确答案】 D7 【正确答案】 A8 【正确答案】 C二、解答题9 【正确答案】 10 【正确答案】 11 【正确答案】 12 【正确答案】 13 【正确答案】 14 【正确答案】

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