PRODUCT SPECIFICATION
RC3403A
8
Typical Applications
(continued)
Figure 18. Bi-Quad Filter
Simplified Schematic Diagram
(1/4 Shown)
65-3403A-20
1/4
3403A
IN
REF
V
W
V
C1
R2
R2
C
R
R1
100K
Bandpass
Output
REF
V
REF
V
R
C
R3
C1
100K
REF
V
100K
Notch Output
Q =
Where:
T = Center Frequency Gain
T = Bandpass Notch Gain
F =
R1 =
R2 =
R3 = T R2
C1 = 10C
F
BW
O
1
2 RC
p
R1
T
QR
BP
Example:
F = 1000 Hz
BW = 100 Hz
T = 1
T = 1
R = 160 k
R1 = 1.6 M
R2 = 1.6 M
R3 = 1.6 M
C = 0.001
μ
F
W
W
W
3
2
1
5
6
7
12
13
14
10
9
8
1/4
3403A
1/4
3403A
1/4
3403A
65-3403A-21
+V
(4)
s
+ Input
(3,5,10,12)
Q7
-V or GND
(11)
Q26A
Q1
Q3
Q4
Q6
Q9
Q10
Q5
Q2
- Input
(2,6,9,13)
C
7 pF
C
Q8
Q14
Q11
Q12
Q26B
Q26C
Q25
Q24
Q18
R4
400
Q17
R3
15K
R2
2K
R1
2K
Q15
Q16
Q20
Q19
R5
50
R6
20
Output
(1,7,8,14)
Q23
Q22
Q21
Q27
Q13