20
Inverting Amplifier
-
+
__
_
-
v
out(OC)
v
d
+
-
R
in
R
F
-
+
__
_
-
v
in
R
1
+
-
•
Model
v
d
≈
0
R
in
≈ ∞
i
in
= i
f
z
in
≈ R
1
i
= 0
i
in
i
f
R
out
A
vol
v
d
internal