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參數資料
| 型號： | MC3405P |
| 廠商： | MOTOROLA INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Processor Supervisory Circuits with Power-Fail 8-SOIC -40 to 85 |
| 中文描述： | QUAD OP-AMP, PDIP14 |
| 封裝： | PLASTIC, DIP-14 |
| 文件頁數： | 7/12頁 |
| 文件大小： | 182K |
| 代理商： | MC3405P |
MC3405
7
MOTOROLA ANALOG IC DEVICE DATA
Figure 12. Window Comparator
Figure 13. Squelch Circuit for AM or FM
Figure 14. High/Low Limit Alarm
VO
13
–13
V
V
Vin
VC
V
Adjust
VCC
10 k
10 k
10 k
10 k
VCC
VEE
VC Adjust
Amp 1
+
13
12
14
9
10
8
10 k
–
Amp 2
+
–
+
–
Comp 2
+
11
5
6
3
2
VEE
1
Vin
Comp 1
4
7
vO
3.0 k
VCC
–
Amp 1
+
–
Comp 1
+
+
Amp 2
–
Vin
C1
C3
C2
R1
R2
13
12
14
C4
R3
VCC
100 k
3
2
1
2.7 k
VCC
2.7 k
10
8
VAO
9
Rf
Ri
VAi
High Pass Filter
Squelch
Threshold Adj
Switched Audio Stage
Gain of Audio Stage
ACI =
Rf
Ri
R3C4 > 5 Tin
Where : Tin is the period of Vin
Q = Quality Factor
Ao = High Frequency Gain
ω
o = Break Frequency
oC
High Pass Filter
Given: Ao, Q,
ω
o = 2
π
fo
Choose: C = C1 = C2, a convenient value
Calculate:
R2 = Q
C3 =
R1 =
Ao
C
Ao
VC
VCC
0
VIL
VIH
Vi
R2 + R3
R1 + R2 + R3
VIL = VCC
VIH = VCC
Oscillator
If R4 = R5 = R6
f = 0.72/RfC
As shown, f = 2.2 kHz
VO will oscillate if VIH < Vi, or VIL > Vi
VO will be low if VIL < Vi < VIH
R3
R1 + R2 + R3
Vi
1.0 k
VCC
R1
3
2
R2
5
6
R3
–
+
–
+
Amp 1
–
+
Amp 2
–
1
Comp 1
7
Comp 2
Hi/Low
Limit Detector
VC
VCC
VCC
10 k
R4
10 k
R5
2.0 k
10 k
R6
12
13
10
9
C
0.01
μ
F
8
VO
1.0 k
2.0 k
10 k
14
Rf 33 k
Oscillator
Q
ω
oC(2Ao + 1)
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