Datasheet
13
LTC1060
1060fb
Figure 10. Mode 2b: 2nd Order Filter Providing Notch,
Bandpass, Lowpass
Figure 11. Mode 3: 2nd Order Filter Providing Highpass,
Bandpass, Lowpass
Figure 12. Mode 3a: 2nd Order Filter Providing Highpass,
Bandpass, Lowpass, Notch
1/2 LTC1060
S
A/B
V
IN
1
+
–
–
–
+
R3
R6 R5
R4
R2
R1
N
(18)
LP
(20)
BP
(19)
S1A
(16)
V
–
(17)
15
4
3 5
2
Σ
6
f
0
=+; f
n
= ; Q =
f
CLK
100(50)
TLC1060 • MOO07
f
CLK
100(50)
f
CLK
2
R3
R2
R2
R1
R2
R4
()
R6
R5 + R6
+
R2
R4
R6
R5 + R6
R6
R5 + R6
R6/(R5 + R6)
(R2/R4) + [R6/(R5 + R6)]
–R2/R1
(R2/R4) + [R6/(R5 + R6)]
H
0N1
(f 0)
= – = – R2/R1; H
0N2
f
← ←
H
0BP
= – R3/R1 ; H
0LP
=
∫
∫
1/2 LTC1060
S
A/B
V
IN
1
+
–
–
–
+
R3
R4
R2
R1
N
(18)
LP
(20)
BP
(19)
S1A
(16)
V
–
(17)
15
4
3
5
2
Σ
6
f
0
=; Q = ; H
0HP
= –R2/R1; H
0BP
= –R3/R1; H
0LP
= –R4/R1
f
CLK
100(50)
TLC1060 • MOO08
R3
R2
R2
R4
R2
R4
∫
∫
1/2 LTC1060
NOTCH
S
A/B
V
IN
1
+
–
–
–
+
R3
R4
R2
R
h
R
g
R
I
R1
HP
(18)
LP
(20)
BP
(19)
S1A
(16)
V
–
(17)
15
4
3 5
2
Σ
6
f
0
=; f
n
= ; H
0HP
=
–
R2/R1; H
0BP
=
–
R3/R1, H
0LP
=
–
R4/R1
f
CLK
100(50)
TLC1060 • MOO09
f
CLK
100(50)
f
CLK
2
R2
R4
(())
R
h
R
I
R
g
R
I
R
g
R
I
R
g
R
h
R4
R1
R3
R2
R2
R4
H
0N1
(f 0)
==•
R
g
R
h
R2
R1
•; H
0N2
; H
0N
(f = f
0
) = Q ; Q =H
0LP
–H
0HP
f
← ←
–
+
EXTERNAL
OP AMP
∫
∫
ODES OF OPERATIO
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