Laboratory Manual - King Fahd University of Petroleum and Minerals

The filter parameters are as follows:
a) Low frequency gain=K
w 1/ C C R R
b)
o
1 2 1 2
wo C R C R C R C R K
Q C1C 2R1 R2
C
2
R
1
R 2
R
(1 ) 1
C
Q
K
1
C
1
R
1
R
2
R
2
C2
c)
1 1 2 1 2 2 1 1
d)
High pass realization
1
The associated HPF is obtained from LPF by exchanging places of resistors and
capacitors (CR/RC transformation).
v s
R 2
3
2
+Vcc
7
C 1
R 1
C 2
-
+
741
4
-Vcc
6
R 3
v o
R 4
Figure 2: Second-order high pass filter
2
vo
sK
THP
() s
v
2
s
vs
s s( C1R1 C2R1 C2R2 C2R2K ) /( C1C 2R1R 2) 1/( C1C 2R1R
2)
Thus, the filter parameters are as follows:
a) High frequency gain=K
w 1/ C C R R
b)
o
1 2 1 2
wo C R C R C R C R K
Q C1C 2R1 R2
R
1
C
1
C 2
R
(1 ) 2
C
Q
K
2
R
2
C
1
C
2
R
1
C
1
1 1 2 1 2 2 2 2
c)
d)
1
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