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[单选题]
某器件的转移特性如图所示,已调波us = uAM = Usm(1 + macosWt)coswct,本振信号ul = Ulmcoswlt,Ulm >> Usm,wi = wl - wc。输出电流io的表达式和混频跨导gc为()。
某器件的转移特性如图所示,已调波us = uAM = Usm(1 + macosWt)coswct,本振信号ul = Ulmcoswlt,Ulm >> Usm,wi = wl - wc。输出电流io的表达式和混频跨导gc为()。
A.io = a(ul + us)k1(wlt),gc = a / p
B.io = a(ul + us)k1(wlt),gc = 2a / p
C.io = a(ul + us)k2(wlt),gc = a / p
D.io = a(ul + us)k2(wlt),gc = 2a / p
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