We will so assuming the op amp to be ideal Figure 2.5 (a) shows the equivalent circuit, and
The analysis proceeds as follows; The gain A is very large(ideally infinite). If We assume
That the circuit is “Working” and producing a finite output voltage at terminal 3, then the
Voltage between the op amp input terminals should be negligibly small. Specifically, if we
Call the output voltage u0, then, by definition,