From Figure 3, write node-voltage equations: one for each input terminal of the op amp. o. The expression for the load current (i,) can be written as a function of the input voltage (vm) and the load voltage (v,) i, = Av, + Bv, b.1. What is the expression for A? b.2. What should be the condition for R,, R, R, and R, so that B is zero? (NB: this condition will make i, depend only on v, and not on R.) R4 R3 OA1 R2 R1 Vin RL Figure 3

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From Figure 3, write node-voltage equations: one for each input
a.
terminal of the op amp.
b. The expression for the load current (i.) can be written as a function of the input
voltage (V) and the load voltage (v.)
iz = Avin + Bv,
b.1.
What is the expression for A?
What should be the condition for R, R, R, and R4, so that B is
b.2.
zero? (NB: this condition will make i, depend only on v, and not on R.)
R4
R3
OA1
R2
R1
RL
Vin
VL
iL
Figure 3
Transcribed Image Text:From Figure 3, write node-voltage equations: one for each input a. terminal of the op amp. b. The expression for the load current (i.) can be written as a function of the input voltage (V) and the load voltage (v.) iz = Avin + Bv, b.1. What is the expression for A? What should be the condition for R, R, R, and R4, so that B is b.2. zero? (NB: this condition will make i, depend only on v, and not on R.) R4 R3 OA1 R2 R1 RL Vin VL iL Figure 3
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