【单选题】—Will you go to Japan for travelling on time after the earthquake? —____________.
【单选题】同相比例运算放大器电路如图所示,输入u i 为有效电压为1V,R1和RF电阻分别为10KΩ和30KΩ,则输出的有效电压为( )V
【单选题】听力原文:W: Are these treatments really necessary? They don't seem to help much. M: I'm afraid so, Mrs. Jones. Just be patient and I'm sure you'll see some results soon. Q: Where did this conversation mos...
B.
In a professor's office.
D.
In a businessman's office.
【单选题】如图所示运算放大器电路 , 输入电压 u i =1V , 则输出电压 u O 等于 ( ) 。
【简答题】—I’m sorry I didn’t bring the book here. —Oh, ____. Bring it next time, OK? A.you’d better not B.I’m afraid not C.as you wish D.that’s all right
【单选题】电路如图所示,运算放大器的最大输出电压为±12V,为了使灯HL亮,输入电压u i 应满足()。
【简答题】变间隙电容传感器的测量电路为运算放大器电路,如图所示。 C 0 =200 pF ,传感器的起始电容量 C x0 =20pF , 定动极板距离 d 0 = 1.5mm , 运算放大器为理想放大器(即 K →∞, Z i →∞), R f 极大,输入电压 u 1 =5 sinω t V 。 求当电容传感动极板上输入一位移量△ x = 0.15mm 使 d 0 减小时,电路输出电压 u 0 为多少? 变...
【单选题】运算放大器应用电路如图所示,在运算放大器线性工作区,输出电压与输入电压之间的运算关系是()。