(完整word版)模拟电子技术基础试卷及参考答案试卷二(1).pdf
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1、模拟电子技术基础试卷及参考答案试卷二(本科)及其参考答案试卷二一、选择题(这是四选一选择题,选择一个正确的答案填在括号内)(共 22 分)1某放大电路在负载开路时的输出电压4V,接入k12的负载电阻后,输出电压降为3V,这说明放大电路的输出电阻为()a.10kb.2kc.4kd.3k2 某共射放大电路如图1-2 所示,其中k2,k470cbRR,若已知 IC=1mA,VCE=7V,VBE=0.7V,rbe=1.6k,50,则说明()a.107.07BECEioVVVVAVb.37.021BEcCioVRIVVAVc.5.62/bebcicibcCiorRRRRRIRIVVAVd.5.626.1
2、250beciorRVVAV图 1-2 3为了使高内阻信号源与低阻负载能很好地配合,可以在信号源与低阻负载间接入()。a.共射电路b.共基电路c.共集电路d.共集-共基串联电路4.在考虑放大电路的频率失真时,若iv为正弦波,则ov()a.有可能产生相位失真b.有可能产生幅度失真和相位失真c.一定会产生非线性失真d.不会产生线性失真5.工作在电压比较器中的运放与工作在运算电路中的运放的主要区别是,前者的运放通常工作在()。a.开环或正反馈状态b.深度负反馈状态c.放大状态d.线性工作状态6.多级负反馈放大电路在()情况下容易引起自激。a.回路增益FA大b.反馈系数太小c.闭环放大倍数很大d.放大
3、器的级数少7.某电路有用信号频率为2kHz,可选用()。a.低通滤波器b.高通滤波器c.带通滤波器d.带阻滤波器8.某传感器产生的是电压信号(几乎不能提供电流),经过放大后希望输出电压与信号成正比,这时放大电路应选()。a.电流串联负反馈b.电压并联负反馈c.电流并联负反馈d.电压串联负反馈9.LC 正弦波振荡电路如图1-9 所示,该电路()。a.由于无选频网络不能产生正弦波振荡b.由于不满足相位平衡条件,不能产生正弦波振荡c.满足振荡条件能产生正弦波振荡d.由于放大器不能正常工作,不能产生正弦波振荡图 1-9 图 1-10 10.图 1-10 所示电路出现故障,经测量得知VE=0,VC=VC
4、C,故障的可能原因为()。a.Rc开路b.Rc短路c.Re短路d.Rb1开路11.与甲类功率放大方式比较,乙类OCL 互补对称功率放大方式的主要优点是()。a.不用输出变压器b.不用输出端大电容c.效率高d.无交越失真二、两级阻容耦合放大电路如图2 所示。已知T1的 gm=1ms,rds=200k;T2的50,rbe=1k。(共 16 分)1.画出中频区的小信号等效电路;2.求放大电路的中频电压增益io/VVAV;3.求放大电路的输入电阻Ri和输出电阻Ro。文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4
5、 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4
6、文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C
7、2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1
8、L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8
9、R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M
10、6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6
11、V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4图 2 图 3 三、在图 3 所示电路中,静态时Vo 为零。三极管为硅管,VBE=0.7V,100。(共 12分)1.试计算 Rc的值;2.算出此时电路的电压增益;/ioVVAV四、分析电路(共18 分)1.电路如图4-1 所示。(1)采用vo1输出时,该电路属于何种类型的反馈放大电路?(2)采用vo2输出时,该电路属于何种类型的反馈放大电路?(3)假设为深度负反馈,求两种情况下的电压增益io1F1
12、/VVAV和io2F2/VVAV。2.某放大电路如图4-2 所示。为了使Ro小,应引入什么样的反馈(在图画出)?若要求20VFA所选的反馈元件数值应为多大?图 4-1 图 4-2 五、电路如图5 所示。设 A1A4为理想运放,三极管T 的 VCES=0,ICEO=0。(共 14 分)1A1A4各组成什么电路?2设0t时,电容器上的初始电压0)0(Cv。求s1t和s2t时,A、B、C、D和 E 各点对地的电压。图 5 六、在图 6 所示电路中,A1和 A2均为理想运放,模拟乘法器的系数1V1K,i1v为输文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:
13、CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 H
14、S3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG
15、3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编
16、码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6
17、 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4
18、ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文
19、档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4入端两个对地电压的差值,0i3v。试写出输出电压ov的表达式。(共 8 分)图 6 七、电路如图7 所示,试指出哪些地方存在错误或不合理之处。(共 10 分)图(a)所示为10 倍交流放大器,图(b)所法为压控电流源,图(c)所示为 100 倍直流放大器,图(d)所示为带整流滤波的并联式稳压电路,图(e)所示为串联反馈型稳压电路。图 7 文档编码:CR8
20、K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U2J6V1L4 ZG3I10D6B8R4文档编码:CR8K4M6C2N6 HS3U
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