试分析图P7.23所示电路的输出u_o1、u_o2和u_o3分别具有哪种滤波特性（LPF、HPF、BPF、BEF

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' />

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

在题图E5-2所示电路中，R=1kΩ，E=10V，u₁=20sin(ωt)V，试分别画出输出电压u₀的波形。二极管的正向压降忽略不计。 <img src='https://img2.soutiyun.com/ask/2020-11-14/974196101016121.png' />

<img src='https://img2.soutiyun.com/ask/2021-02-25/983104939893055.png' /><img src='https://img2.soutiyun.com/ask/2021-02-25/983104949642613.png' />

<img src='https://img2.soutiyun.com/shangxueba/ask/18198001-18201000/18200839/2017060615030773241.jpg' /> A．最大输出电压Um B． 最小大输出电流Im C． 最大输出电流Im D． 最大输出电压Umi

<img src='https://img2.soutiyun.com/ask/2020-10-07/970947501400923.png' />

<img src='https://img2.soutiyun.com/ask/2021-02-24/983011617314964.png' />

A．20mV B． 40mV C． 0mV D． -40mV

<img src='https://img2.soutiyun.com/ask/2020-10-09/9710926633126.jpg' />

<img src='https://img2.soutiyun.com/ask/2020-07-30/964950328082165.png' />

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' />

<img src='https://img2.soutiyun.com/ask/2020-08-23/967072228995764.png' />

试求图题12-6所示电路的冲激响应h(t)=u(t)，并求u(0₊)，如发生跃变，试解释之。 <img src='https://img2.soutiyun.com/ask/2020-09-01/967819384556862.png' />

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

计算图P2.4所示电路中的反相器G_M能驱动多少同样的反相器.要求G_M输出的高、低电平符合U_OH≥3.2V,U_OL≤0.25V.已知所有的反相器均为74LS系列TTL电路,输入电流I_IL=0.4mA,I_IH=20μA,I_OL_(max)=-8mA,I_OH(max)=0.4mA. <img src='https://img2.soutiyun.com/ask/2021-01-21/980091690831762.png' />

<img src='https://img2.soutiyun.com/ask/2021-01-03/978541348429745.png' />

<img src='https://img2.soutiyun.com/ask/2021-01-09/979047223294152.png' />

已知电路如题7-11图所示.输入电压为u_i(t)=(10sin200t+10sin400t+10sin800t)V若要使输出电压u₀(t)中仅包含角频率为200rad/s的谐波分量,问L、C应取何值？ <img src='https://img2.soutiyun.com/ask/2020-10-10/971183075841306.jpg' />

<img src='https://img2.soutiyun.com/ask/2021-01-03/978541917492294.png' />

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

已知所有的反相器均为74LS系列TIL电路,输入电流I_IL=0.4mA, </sub>IH</sub>=20μA,I_OL(max)=8mA,I_OH(max)=0.4mA. <img src='https://img2.soutiyun.com/ask/2021-02-25/983105410062948.png' />