电路如图2.9所示，输出电阻r_o为( )。<img src='https://img2.soutiyun.com/ask/5454001-5457000/199c1c419fdceb92112ea7ca48fb17b4.gif' />

A . 出现了饱和失真，应调大R B . 出现了饱和失真，应调小R C . 出现了截止失真，应调大R D . 出现了截止失真，应调小R

A．<img src='https://img2.soutiyun.com/ask/uploadfile/5451001-5454000/47b2a510e0a9d766936e559a75f13cc6.jpg' /> B．<img src='https://img2.soutiyun.com/ask/uploadfile/5451001-5454000/ba7c4c26f9e0aabf45a5288979363c3b.jpg' /> C．<img src='https://img2.soutiyun.com/ask/uploadfile/5451001-5454000/b741de6e39726b6e8d48e6783572fa50.jpg' /> D．<img src='https://img2.soutiyun.com/ask/uploadfile/5451001-5454000/df5c3cc12ef18067afdb65ba624ba90f.jpg' /> <img src='https://img2.soutiyun.com/ask/uploadfile/5451001-5454000/725c8102fac358252108dc862a676ffc.jpg' />

<img src='https://img2.soutiyun.com/ask/2020-11-15/974324820322645.png' />

<img src='https://img2.soutiyun.com/ask/2020-11-27/975339562699779.png' />

A．16V，17Ω B．16V，9Ω C．-16V，10Ω D．-16V，9Ω <img src='https://img2.soutiyun.com/ask/uploadfile/5484001-5487000/d82841b01f81c0fd530f8efa2a7ceb0b.png' />

包络检波电路如图NP4-30所示，二极管正向电阻R_D=100Ω，F=100-5000Hz。图(a)中，M_amax=0.8;图(b)中M_a=0.3。试求图(a)中电路不产生负峰切割失真和惰性失真的C和R_i2值。图(b)中可变电阻R₂接触点在中心位置时，是否会产生负峰切割失真？ <img src='https://img2.soutiyun.com/ask/2021-02-26/983184189230326.png' />

A．20mV B． 40mV C． 0mV D． -40mV

INA2128型仪用放大器。电路如图题2.4.4所示，其中R₁是外接电阻。(1)它的输入干扰电压V_C=1 V(直流)，输入信号v_i1=-v_i2=0.04sinwtV，输入端电压v₁=(V_C+0.04sinwt)V，v₂=(V_C-0.04sinwt)V，当R₁=1千欧时，求出v₃、v₄、v₃-v₄和v₀的电压值;(2)当输入电压V_id=V₁-V₂=0.018 66V时，要求V₀=-5V，求此时外接电阻R₁的值。 <img src='https://img2.soutiyun.com/ask/2020-11-16/974407695603507.png' />

电路如图题11.1.3所示，已知V₂=20V，R_L=50千欧，C=1000μ_F。(1)如当电路中电容C开路或短路时，电路会产生什么后果？两种情况下V_L各等于多少？(2)当输出电V_L=28V，18V，24V和9V时，试分析诸情况下，哪些属于正常工作的输出电压，哪些属于故障情况，并指出故障原因。 <img src='https://img2.soutiyun.com/ask/2020-12-04/975948536131091.png' />

&nbsp;&nbsp;<img src="https://img2.soutiyun.com/ask/uploadfile/5520001-5523000/c00feb3061090485cf29cca56cd60b4b.jpg"/>

对于题1-19图所示电路,(1)当端口电压U_ab=50V时,求输出电压<img src='https://img2.soutiyun.com/ask/2020-10-09/971093340927358.png' /><img src='https://img2.soutiyun.com/ask/2020-10-09/971093352207003.png' />(2)计算端口等效电阻R_ab. <img src='https://img2.soutiyun.com/ask/2020-10-09/971093371271093.png' />

在原教材图16.2.7所示的差动运算电路中,<img src='https://img2.soutiyun.com/ask/2020-10-06/970865669582042.png' /><img src='https://img2.soutiyun.com/ask/2020-10-06/970865681905746.png' />,试求;输出电压u_o. <img src='https://img2.soutiyun.com/ask/2020-10-06/970865705847116.png' />

电阻分压器如图11-7所示,此电路可以看作负反馈系统,若以V₁(s)作输入、V₂(s)作输出,画出与图11-1对应的反馈系统框图,求A(s),F(s). <img src='https://img2.soutiyun.com/ask/2020-12-02/975759824628774.png' />

<img src='https://img2.soutiyun.com/ask/2021-01-01/978376318535917.png' />

一实用微分电路如图题2.4.14所示，它具有衰减高频噪声的作用。(1)确定电路的传递函数V_o(s)/V_i(s);(2)若R₁=R₂=R，C₁=C₂=C，试问输入信号v₁的频率应当怎样限制，才能使电路不失去微分的功能？ <img src='https://img2.soutiyun.com/ask/2020-11-16/97440862525268.png' />

<img src='https://img2.soutiyun.com/shangxueba/ask/50796001-50799000/50796740/967040986097027.png' />

A．最大值为40V，最小值为0V B． 最大值为40V，最小值为+10V C． 最大值为10V，最小值为－40V D． 最大值为10V，最小值为0V

在图NP2-17(a)所示的T型匹配网络中，已知输出负载电阻为R_L，放大器要求的匹配阻抗为R_e。 <img src='https://img2.soutiyun.com/ask/2021-02-24/983011823810775.png' /> <img src='https://img2.soutiyun.com/ask/2021-02-24/983011845538018.png' />

<img src='https://img2.soutiyun.com/ask/2020-09-01/96781572451352.png' />

分析图NP1-28所示桥式整流电路。(1)当V₂=20V时，估算输出整流电压V_O值，设ωC_LR_L=10，R_s/R_L=0.05;(2)D₁开路时，对输出电压V_O有何影响？(3)D₂极性接反会发生什么现象？ <img src='https://img2.soutiyun.com/ask/2021-02-24/983009778890813.png' />

<img src='https://img2.soutiyun.com/ask/2020-10-14/971545303208146.jpg' />

电路如图16.32所示。知<img src='https://img2.soutiyun.com/ask/2020-10-06/970865881862183.png' /><img src='https://img2.soutiyun.com/ask/2020-10-06/970865902381357.png' />试求:u_o. <img src='https://img2.soutiyun.com/ask/2020-10-06/970865916234149.png' />

<img src='https://img2.soutiyun.com/ask/2020-11-16/97440849814341.png' />

<img src='https://img2.soutiyun.com/ask/2021-01-09/979037423125615.png' />