[考研类试卷]模拟电子技术基础模拟试卷2及答案与解析.doc

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1、模拟电子技术基础模拟试卷 2 及答案与解析一、填空题请完成下列各题,在各题的空处填入恰当的答案。1 当温度升高时,三极管的下列参数变化趋势为:电流放大系数 _,反向饱和电流 ICBO_,I B 不变时,发射结正向电压 VBE_。2 3 4 串联负反馈只有在信号源内阻_时,其反馈效果才显著;并联负反馈只有在信号源内阻_时,其反馈效果才显著。5 设输入信号为 v1,在反相比例运算电路中,运放两个输入端的共模信号vic_,与同相比例运算电路相比,反相输入比例运算电路的输入电阻_。6 7 试决定下列情况应选用的滤波器类型。当有用信号频率低于 500 Hz 时,宜选用_滤波器;当希望抑制 50 Hz 交

2、流电源的干扰时,宜选用_滤波器;当希望抑制 1 kHz 以下的信号时,宜选用_滤波器。二、解答题8 9 10 11 12 13 14 15 模拟电子技术基础模拟试卷 2 答案与解析一、填空题请完成下列各题,在各题的空处填入恰当的答案。1 【正确答案】 增大,增大,减小2 【正确答案】 100,210 6,203 【正确答案】 374 【正确答案】 很小,很大5 【正确答案】 0,较小6 【正确答案】 电流串联负,电流并联负,电压并联负7 【正确答案】 低通,带阻,高通二、解答题8 【正确答案】 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】 15 【正确答案】

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