SLVU006A Datasheet, PDF (22/28 Pages) Texas Instruments – UNIVERSAL OPERATIONAL AMPLIFIER EVALUATION MODULE

Sallen-Key High-Pass Filter
Figure 3–2. Sallen-Key High-Pass Filter with Single Supply Using Area 200
R218
C205
V2+
GND2
V1–
V2+
C204
0.1 µF
C203
1 µF
C209 C210
A201–
A202–
A203+
A204+
R206
R207
R208
R209
C212
R219
R205
Jumper
V2+
2–
3+
8
1
4 ^U201a
V2–
A2OUT
1/2 Dual OP Amp
Not Used
Power Supply Bypass ^V2–
C211
R217
C206
VREF2 = 2.5 V
V2+
B201–
R214
2.2 kΩ
B202–
B204+
R215
C
R
A
R216
U202
TL431ACLP
B203+
R203
R202
R201
mR
R210
C
+
Vin
–
Jumper B204 + to VREF2
Voltage Reference
R212
C202
C207
R211
nC
C208
R204
Jumper
6–
7
5 _{+ U201b}
R213
–(f/fo)2
VOUT = VIN _{1+(j/Q)(f/fo) – (f/fo)2}
B2OUT
1/2 Dual OP Amp
fo
=
2π
1
√mn
RC
Q
=
√mn
m+1
+ VREF2
C201
R
3-4
Example Circuits