图7-52中a所示的固定偏置放大电路中，已知晶体管的输出特性曲线和电路的直流负载线［图7-52中的b］，可得出该电路的静态值为（）。https://assets.asklib.com/psource/2015110111430173101.jpg

A、增加 B、减少 C、基本不变

A . 放大 B . 饱和 C . 截止 D . 不定

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 . 6A B . 2A C . －2A

A . 饱和 B . 截止 C . 低频 D . 交越

A .https://assets.asklib.com/psource/2015110110011338335.jpg B .https://assets.asklib.com/psource/2015110110012995500.jpg C .https://assets.asklib.com/psource/2015110110014895341.jpg D .https://assets.asklib.com/psource/2015110110020243252.jpg

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' />

A．放大区 B．饱和区 C．截止区 D．无法确定

A．饱和 B．截止 C．低频 D．交越

<img src='https://img2.soutiyun.com/ask/2020-09-11/9687068705288.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' />

下图所示的放大电路中，晶体管的β=50，r_be=0.8kΩ，U_BE=0.7V，各电容对交流信号均可视为短路。 <img src='https://img2.soutiyun.com/ask/uploadfile/5406001-5409000/906d1cb1d3e1bd2ed0d871c46864ed7f.png' /><img src='https://img2.soutiyun.com/ask/uploadfile/5406001-5409000/9e057c93737da239bf7adc3b55f40caa.png' />

图2.17(a)所示的为TTIL门电路,图2.17(b)所示的为CMOS门电路,试根据图2.17(c)中给出的输入A、B的波形画出Y₁、Y₂的波形. <img src='https://img2.soutiyun.com/ask/2021-01-21/980091383808201.png' />

在图LP4-69所示的共集电极电路中,已知晶体三极管在I_CQ=2mA时的参数为r_bb=50Ω,<img src='https://img2.soutiyun.com/ask/2020-10-26/97255806712955.png' />试求高频电压传递函数<img src='https://img2.soutiyun.com/ask/2020-10-26/972558082050404.png' />的表示式. <img src='https://img2.soutiyun.com/ask/2020-10-26/972558092714014.png' />

<img src="https://img2.soutiyun.com/shangxueba/askkp/2022-04/13/1387/20220413142947930.png" alt=""/>

A．饱和状态 B．放大状态 C．截止状态 D．不确定状态

A、静态失真 B、动态失真 C、饱和失真 D、截止失真

①静态工作点Ib、Ic、Uce。 ②若把集电极电流Ic调到2mA，则Rb应选多大？ <img src='https://img2.soutiyun.com/shangxueba/ask/18078001-18081000/18079962/2014102111400457147.png' />

在图题6.2.1(主教材图 6.2.2)所示的射极耦合差分式放大电路中，+Vcc= +10V, -VEE= -10 V, Io=1mA, ro=25 kΩ(电路中未画出)， Rc1=Rc2=l0kΩ, BJT 的β=200，VBE =0.7 V; (1)当Ui1 =Ui2=0时，求Ic. VE、VCE1和VCE2; (2)当<img src='https://img2.soutiyun.com/ask/2020-06-29/962272700560939.png' />时，求双端输出时的AUd和单端输出的Avd1、Avc1和KCMR1的值。 <img src='https://img2.soutiyun.com/ask/2020-06-29/962272646297835.jpg' />

A．IB=0.06mA，IC=4mA，UCE=12V B．IB=0.02mA，IC=2mA，UCE=12V C．IB=0.04mA，IC=2mA，UCE=6V D．IB=0.06mA，IC=4mA，UCE=6V