Schematic: http://i1244.photobucket.com/albums/gg572/amandafairchild/f87a5c04.jpg
(Just trying to check my answers) I got A=2mV, B=5mV, D=7mV, E=450mV, G=450mV
(Just trying to check my answers) I got A=2mV, B=5mV, D=7mV, E=450mV, G=450mV
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A, B as given in diagram
C = D = 0 for an ideal op amp
Input A puts 2mv/1k = 2uA *into* node D
Input B puts 5mv/2k = 2.5ua *into* node D
Node E must be at a voltage which pulls (2 + 2.5)ua *out* of node D via 100k
- no current flows in the op amp input
Thus node E is at -10^5*4.5*10^-6 volts = -0.45 volts (note the sign!)
G = E otherwise there would be a voltage across the inputs of the second op amp.
C = D = 0 for an ideal op amp
Input A puts 2mv/1k = 2uA *into* node D
Input B puts 5mv/2k = 2.5ua *into* node D
Node E must be at a voltage which pulls (2 + 2.5)ua *out* of node D via 100k
- no current flows in the op amp input
Thus node E is at -10^5*4.5*10^-6 volts = -0.45 volts (note the sign!)
G = E otherwise there would be a voltage across the inputs of the second op amp.