LM358, LM258, LM2904, LM2904V
Figure 7. Voltage Reference
R1
VCC
VCC
–
1/2
Figure 8. Wien Bridge Oscillator
50 k
R2
5.0 k
10 k
VO
Vref
–
1/2
VCC
VO
1
fo =
2
π
RC
R
C
For: fo = 1.0 kHz
R = 16 kΩ
C = 0.01
µF
LM358
MC1403
2.5 V
+
1
Vref = VCC
2
R1
VO = 2.5 V (1 +
)
R2
R
LM358
+
C
Figure 9. High Impedance Differential Amplifier
e1
+
1/2
Figure 10. Comparator with Hysteresis
1
CR
R
R2
R1
eo
Vref
Vin
Hysteresis
VOH
VO
VO
LM358
–
a R1
b R1
–
1/2
1/2
–
R1
+
1/2
LM358
+
1
CR
R
LM358
–
VOL
VinL
Vref
VinH
LM358
e2
+
R1
(V – V )+ V
VinL =
R1 + R2 OL ref ref
R1
(V – V ) + Vref
VinH =
R1 + R2 OH ref
H=
R1
(VOH – VOL)
R1 + R2
eo = C (1 + a + b) (e2 – e1)
Figure 11. Bi–Quad Filter
R
Vin
C1
R2
–
C
R
1/2
R
100 k
C
–
100 k
–
1/2
1
fo = 2
π
RC
R1 = QR
R2 = R1
TBP
R3 = TN R2
C1 = 10 C
For: fo = 1.0 kHz
Q = 10
TBP = 1
TN = 1
1
Vref = VCC
2
1/2
LM358
+
LM358
+
LM358
Vref
R2
R1
Vref
Bandpass
Output
–
1/2
+
R3
Vref
C1
Notch Output
R
C
R1
R2
R3
= 160 kΩ
= 0.001
µF
= 1.6 MΩ
= 1.6 MΩ
= 1.6 MΩ
LM358
+
Vref
Where: TBP = Center Frequency Gain
TN = Passband Notch Gain
MOTOROLA ANALOG IC DEVICE DATA
5
MOTOROLA [ MOTOROLA, INC ]
