LM2902 데이터 시트보기 (PDF) - ON Semiconductor
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LM2902 Datasheet PDF : 16 Pages
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LM324, LM324A, LM224, LM2902, LM2902V, NCV2902
VCC
MC1403
R1
VCC
R2
−
1/4
LM324
VO
+
2.5 V
VO = 2.5 V
1
+
R1
R2
50 k
Vref
Vref =
1
2
VCC
5.0 k
10 k
−
VCC
1/4
LM324
+
R
RC
C
VO
1
fo = 2 p RC
For: fo = 1.0 kHz
R = 16 kW
C = 0.01 mF
Figure 11. Voltage Reference
Figure 12. Wien Bridge Oscillator
e1
+
1/4
1
C
R
R
LM324
−
R1 a R1
−
1/4
LM324
eo
+
b R1
−
1/4
1
C
R
LM324
e2
+
R
eo = C (1 + a + b) (e2 − e1)
Figure 13. High Impedance Differential Amplifier
R2
R1
Vref
Vin
+
1/4
LM324
−
VOH
VO
VO VOL
VinL =
R1
R1 + R2
(VOL − Vref) + Vref
VinH =
R1
R1 + R2
(VOH − Vref) + Vref
H=
R1
R1 + R2
(VOH − VOL)
Hysteresis
VinL VinH
Vref
Figure 14. Comparator with Hysteresis
Vin C1
R2
R
−C
1/4
LM324
+
Vref
R2
R
C
R
−
1/4
LM324
+
100 k
100 k
−
1/4
LM324
1
fo =2 p RC
R1 = QR
R2 =
R1
TBP
R3 = TN R2
C1 = 10C
Vref =
1
2
VCC
Vref
Bandpass
Output
R1
R3
−
1/4
LM324
+
+
Vref
C1
For: fo = 1.0 kHz
For: Q = 10
For: TBP = 1
For: TN = 1
Notch Output
R = 160 kW
C = 0.001 mF
R1 = 1.6 MW
Vref
Where: TBP = Center Frequency Gain
Where: TN = Passband Notch Gain
R2 = 1.6 MW
R3 = 1.6 MW
Figure 15. Bi−Quad Filter
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