专业基础

单选题某反馈电路的闭环增益,则A和F应为下列哪组数值?(  )2010-30

A.100,0.009
B.1000,0.01
C.100,0.01
D.1000,0.099

参考答案:D进入在线模考
解题过程:
(1)
(2)负反馈使放大倍数稳定性提高,即
根据已知条件可得:,(1)
(3)已知,则,可得: (2)
联立式(1)、式(2)求解可得: