LP
HP
R
P
A
1
V
IN
C
P
A
2
V
O
V
IN
C
P
A
1
R
P
A
2
V
O
Optional
Buffer
Real Pole
Section
Optional
Buffer
Real Pole
Section
(a)
Real pole f
O
= f
–3dB
= 1/(2π • R
P
• C
P
) [Hz]
GAIN = 1.0V/V
(a)
Real pole f
O
= f
–3dB
= 1/(2π • R
P
• C
P
) [Hz]
GAIN = 1.0V/V
R
1
R
2
R
1
R
2
R
P
A
1
V
IN
C
P
A
2
V
O
V
IN
C
P
A
1
R
P
A
2
V
O
Optional
Buffer
Real Pole
Section
Optional
Buffer
Real Pole
Section
(b)
Real pole f
O
= f
–3dB
= 1/(2π • R
P
• C
P
) [Hz]
GAIN = 1 + R
2
/R
1
C
P
(b)
Real pole f
O
= f
–3dB
= 1/(2π • R
P
• C
P
) [Hz]
GAIN = 1 + R
2
/R
1
R
2
R
P
R
1
A
1
V
IN
A
2
V
O
V
IN
A
1
A
2
V
O
C
P
R
P
Optional
Buffer
Real Pole
Section
Optional
Buffer
Real Pole
Section
(c)
Real pole f
O
= f
–3dB
= 1/(2π • R
P
• C
P
) [Hz]
GAIN = –R
P
/R
1
(c)
Real pole f
O
= f
–3dB
= 1/(2π • R
P
• C
P
) [Hz]
GAIN = –R
2
/R
P
FIGURE 13. Low-Pass (LP) Subcircuit: (a) Basic; (b) with
Noninverting Gain; (c) with Inverting Gain.
FIGURE 14. High-Pass (HP) Subcircuit: (a) Basic; (b) with
Noninverting Gain; (c) with Inverting Gain.
5
A
4
UAF42
Fragment
4
6
FIGURE 15. Connect Unused Auxiliary Op Amps as
Grounded-Input Unity-Gain Followers.
9
BURR-BROWN [ BURR-BROWN CORPORATION ]
