试判断如图BG4-4所示电路为哪种运算放大器电路。

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/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 . 电阻元件 B . 电感元件 C . 电容元件 D . 运算放大器

A . 电阻元件 B . 电容元件 C . 电感元件 D . 电源元件

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/ask/2020-12-16/976960566440623.png' />

A．顺序 B．分层 C．串联 D．并联

理想运放组成的电路如图2-3所示，试导出电路的增益表达式<img src='https://img2.soutiyun.com//1/2021-06-04/991677336315431.jpg' />=？ 并在<img src='https://img2.soutiyun.com//1/2021-06-04/991677361034168.jpg' />时，求出<img src='https://img2.soutiyun.com//1/2021-06-04/991677375284189.jpg' />。 <img src='https://img2.soutiyun.com//1/2021-06-04/99167754600275.jpg' />

输出电压的扩展电路如图题10.2.4所示。设<img src='https://img2.soutiyun.com/ask/2020-07-01/962467157251568.jpg' />，试证明<img src='https://img2.soutiyun.com/ask/2020-07-01/962467163377919.jpg' /> <img src='https://img2.soutiyun.com/ask/2020-07-01/962467257757317.png' />

<img src='https://img2.soutiyun.com/ask/2020-11-17/974475215782968.png' />

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

1、74LS138的作用是什么？ 2、74LS138在什么条件下才工作？ 3、RAM的地址范围是多少？ <img src='https://img2.soutiyun.com/shangxueba/ask/19143001-19146000/19143786/2015061315042538154.jpg' />

电路如图题3.1 (a)、(b)、(c)、 (d)所示，试找出电路中的错误，并说明为什么。 <img src='https://img2.soutiyun.com/ask/2020-08-20/966789672813497.png' />