电路如图5所示，运算放大器构成 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/ad0dc8cc2e8547ccb31a035a818c1d8d.png

A .https://assets.asklib.com/psource/2015110110040637807.jpg B .https://assets.asklib.com/psource/2015110110042011959.jpg C .https://assets.asklib.com/psource/2015110110045042416.jpg D .https://assets.asklib.com/psource/2015110110043822770.jpg

A .https://assets.asklib.com/psource/2015110110321023485.jpg B .https://assets.asklib.com/psource/2015110110322177199.jpg C .https://assets.asklib.com/psource/2015110110324894811.jpg D .https://assets.asklib.com/psource/2015110110330118892.jpg

A .https://assets.asklib.com/psource/2015103016374077578.jpg B .https://assets.asklib.com/psource/2015103016374077578.jpg C .https://assets.asklib.com/psource/2015103016374077578.jpg D .https://assets.asklib.com/psource/2015103016374077578.jpg

A . 反相比例运算 B . 反相积分运算 C . 同相比例运算 D . 同相积分运算

A . 2V B . 正饱和值 C . 负饱和值 D . -2V

A . 串联电流负反馈 B . 并联电流负反馈 C . 串联电压负反馈 D . 正反馈

A . 电阻元件 B . 电感元件 C . 电容元件 D . 运算放大器

A .https://assets.asklib.com/psource/2015110110224381410.jpg B .https://assets.asklib.com/psource/2015110110225578861.jpg C .https://assets.asklib.com/psource/2015110110231370645.jpg D .https://assets.asklib.com/psource/2015110110232528824.jpg

A . R 引入的为正反馈，R 引入的为负反馈 B . R 和R 引入的均为负反馈 C . R 和R 引入的均为正反馈 D . R 引入的为负反馈，R 引入的为正反馈

A . 电阻元件 B . 电容元件 C . 电感元件 D . 电源元件

A . A B . B C . C D . D

A . u ＞0 B . u =0 C . u ＜0 D . 任意数值

如图1．3．16所示电路为晶体管放大器等效电路，电路中各电阻及β均为已知，求电流放大系数Ai(Ai=i2/i1)、电压放大系数Au(Au=u2／uS。 <img src='https://img2.soutiyun.com/ask/uploadfile/5385001-5388000/7e6ad554669d6eb2c2594eab2bfde8ab.jpg' />

电路如图4-74所示。合理连线，构成5V的直流电源。 <img src='https://img2.soutiyun.com/ask/2020-06-12/960827107000866.png' />

集成运算放大器开环<img src='https://img2.soutiyun.com/ask/2020-10-21/972150302890311.jpg' />的幅频特性,如图LT5-14(a)所示,用它组成如图LT5-14(b)所示的反馈电路.试判断电路稳定性,并估算<img src='https://img2.soutiyun.com/ask/2020-10-21/972150334875141.jpg' /> <img src='https://img2.soutiyun.com/ask/2020-10-21/972150350417029.png' />

电路如图4.14所示，试写出u_o与u_i的运算关系。 <img src='https://img2.soutiyun.com/ask/5448001-5451000/9dbb3ab87d6f5d77f4e73f5d55268fc5.gif' />

<img src='https://img2.soutiyun.com/shangxueba/ask/18240001-18243000/18240162/2017032216131427523.png' />

<img src='https://img2.soutiyun.com/ask/2019-05-13/926632091552615.png' />

<img src='https://img2.soutiyun.com/ask/2020-11-15/974324472017723.png' />

A．30 B．-30 C．-3 D．10

<img src='https://img2.soutiyun.com/shangxueba/ask/18363001-18366000/18363426/2015110110315234892.jpg' /> A．<img src='https://img2.soutiyun.com/shangxueba/ask/18363001-18366000/18363426/2015110110321023485.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/18363001-18366000/18363426/2015110110322177199.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/18363001-18366000/18363426/2015110110324894811.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/18363001-18366000/18363426/2015110110330118892.jpg' />

A．10V B．-10V C．-11V D．-12.5V