工作在非线性区的理想运放,当输出电压U0为负向饱和电压U0(sat)时,亦即U0=-U0(sat),则运放的u+与u_的关系为()
A.u+﹤u
B.u+=u_=0
C.u+>u_
D.u+=u_
正确答案是C
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