The equivalent circuit the op-amp shown fig
| Basic op-amp. |
|---|
| Vd | Ri | Ad Vd | Vo | Vd |
|
Vo |
|---|---|---|---|---|---|---|
| Figure 14.11 | ||||||
|
(b) | |||||
| 616 | Chapter 14 |
|
|---|
Using superposition, we can solve for the voltage V1 in terms of the components
due to each of the sources. For source V1 only (�AvVi set to zero),
R 1
Vi2 � �� (�AvVi)
R1�Rf R1�Rf
which can be solved for Vi as
| (14.7) |
|---|
Vi � �� V1
A vR 1
| 14.3 |
|
617 |
|---|
