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V out1
V out4
I out2
V out5
C 1
Y 1
Z 1-
Y 4
R 3
R 1
-Z +
V in
X +
FDCCII
Z 1+
I out1
I 1
X -
Z +
I out3
Y 2
Z -
Y 3
I 2
R 2
V out3
C 2
V out2
Fig. 12.26 Mixed-mode filter configuration proposed by Lee and Chang (Adapted from [ 75 ]
©
2008 Elsevier GmbH)
Assuming the type of FDCCII employed to be characterized by the following
matrix:
2
3
2
3
2
3
001
110
V
V X
I
I
I Z 1 þ
I Z
I Z 1
I
I X
V Y 1
V Y 2
V Y 3
V Y 4
4
5
00
1101
4
5
4
5
100 000
100000
100000
010000
010000
¼
ð
12
:
98
Þ
a routine circuit analysis for the three different cases yields:
Case-I if I 1 ¼
0 (open circuited) and input signal is V in , this circuit is capable of
providing simultaneously five generic responses in VM, BPF and HPF in
transconductance mode. The various transfer functions are given by:
I 2 ¼
C 2 R 2
Ds
1
s
1
C 1 C 2 R 1 R 2
Ds
s 2
Ds
V out 1
V in ¼
V out 2
V in ¼
V out 3
V in ¼
ð
12
:
99
Þ
ðÞ ;
;
ðÞ
ðÞ
s 2
1
C 1 C 2 R 1 R 2
þ
V out 4
V in ¼
ð
12
:
100
Þ
Ds
ðÞ
and
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