Hardware Reference
In-Depth Information
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
Xþ
V
X
I
Zþ
I
Zþ
I
Z
1
þ
I
Z
I
Z
1
I
Xþ
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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