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a
R
b
R
a
V
in
Y
I3
CCII+
+
Z
V
0
X
−
R3
R
2
I
2
I
1
R
1
b
R
b
R
a
R
2
V
in
Y
−
CCII+
Z
V
0
X
+
R
1
R
3
Fig. 8.22 Pseudo-exponential function circuits proposed by Maundy and Gift [
16
]
In the circuit of Fig.
8.22a
, the voltage at node-Y (assuming identical resistors
R
a
¼
R
b
) is given by:
V
in
þ
V
o
V
y
¼
ð
8
:
31
Þ
2
Due to the properties of the CCII+, the voltage applied on terminal-Y is transferred
to terminal-X. By a routine analysis of the circuit, it can be easily found that:
1
þ
R
2
R
1
1
1
R
3
V
in
V
o
¼
ð
8
:
32
Þ
1
1
R
3
1
R
2
R
1
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