- #1
hani114
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Homework Statement
everything is attached in the image below
Homework Equations
Ip=In=0 Vp=Vn
The Attempt at a Solution
i used the two rules that vp=vn & ip=in=0
so i tink no current flows in Vc & Vd and the 60kohm resistor.. as for Va & Vb we apply kcl on the input voltage node and solve for Vo
current in Va is Ia and so forth.. and current in 375kohm(Re) resistor is Ie
so Ia + Ib + Ie = 0
Va/Ra + Vb/Rb + Vo/Re = 0
so we calculate Vo from that
for the second part we need to calculate the range for Vb so that -20<Vo<20
so i think we have to put Vo in terms of Vb and replace that in the range so that we get Vb
can anyone help me with this? it's late now and that's the best i can do..