第2个回答 2013-12-27
u2=ic2/xc1,ic2=u2xc2
uc1=ic2(r2+1/xc2)=u2(r2xc2+1)
u1=uc1+ir1*r1=uc1+(uc1xc1+ic2)*r1=u2(r2xc2+1)+[u2(r2xc2+1)xc1+u2xc2]r1
=u2r2xc2+u2+u2(r2xc2+1)xc1r1+u2xc2r1
=u2[r2xc2+1+(r2xc2+1)xc1r1+xc2r1]
r1=r2=1
u1=u2(2xc2+1+xc1xc2+xc1)
c1=1,c2=0.5,xc1=1/w,xc2=2/w,w=2πf
u1=u2(1+5/w+2/w^2)