某放大电路如图所示,设各集成运算放大器都具有理想特性，该电路的中领电压放大倍数为（）

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

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

A . 正确 B . 错误

A .https://assets.asklib.com/psource/2015110110304436211.jpg B .https://assets.asklib.com/psource/2015110110305876774.jpg C .https://assets.asklib.com/psource/2015110110311388037.jpg D .https://assets.asklib.com/psource/2015110110312795784.jpg

A . A．Au→∞ri→∞r0→0 B . B．Au→∞ri→0r0→∞ C . C．Au→∞ri→∞r0→∞ D . D．Au→0ri→0r0→0

A . 仍为方波信号 B . 出现非线性失真 C . 出现频率失真 D . 出现两种失真

A . -11 B . -10 C . 10 D . 11

A . 输入特性曲线 B . 放大曲线 C . 动态特性曲线 D . 直流负载线

A . 1 B . 0.1 C . 10 D . 100

A . 正确 B . 错误

<img src='https://img2.soutiyun.com/ask/2021-03-02/983544202242273.png' />

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' />

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' />

<img src='https://img2.soutiyun.com/shangxueba/ask/18387001-18390000/18389473/2015110110302722226.jpg' /> A．<img src='https://img2.soutiyun.com/shangxueba/ask/18387001-18390000/18389473/2015110110304436211.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/18387001-18390000/18389473/2015110110305876774.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/18387001-18390000/18389473/2015110110311388037.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/18387001-18390000/18389473/2015110110312795784.jpg' />

A．Y.是 B．N.否

A．电流串联负反馈 B．电流并联负反馈 C．电压串联负反馈 D．电压并联负反馈

<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．-102.6 B．-88.2 C．-18.9 D．-53

A．3 B．2 C．1 D．2

A．该放大器是线性放大器 B．该放大器放大倍数为2 C．该放大器出现了非线性失真 D．该放大器出现了频率失真

<img src='https://img2.soutiyun.com/ask/2021-03-02/983544803782679.png' />

<img src='https://img2.soutiyun.com/ask/2020-10-21/972143314097575.jpg' />