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參數(shù)資料
| 型號： | AND8054 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Designing RC Oscillator Circuits with Low Voltage Operational Amplifiers and Comparators for Precision Sensor Applications |
| 中文描述： | RC振蕩器電路設(shè)計(jì)低電壓運(yùn)算放大器和精密傳感器應(yīng)用比較 |
| 文件頁數(shù)： | 22/28頁 |
| 文件大?。?/td> | 168K |
| 代理商： | AND8054 |
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AND8054/D
http://onsemi.com
22
Figure 26. Reference Design – Ratio Circuit
C1
C2
C4
47 pF
R2
39 k
R3
5 k
R4
A3
A2
A1
R1
39 k
R6
1 k
NCS2200
+
–
240 pF
+
NCS2001
–
+
NCS2001
–
3 Meg
Q1
MPS2907A
–
+
A4
R8
5 k
V
CC
R7
100 k
240 pF
V
CC
/2
NCS2001
V
CC
/2
V
CC
/2
V
CC
/2
C3
47 pF
R5
20 Meg
V
CC
R9
39 k
R10
39 k
V
CC
/2
NOTES:
1. Power Supply Voltages for amplifiers A1, A2, A3, and A4 is V
CC
= 0.9 V, V
EE
= 0 V
2. Capacitors C3 and C4 are typically the sensor capacitance; however, for test purposes two 47 pF capacitors were used to verify the
circuit.
3. V
Max_Limit
= 0.8 V
V
Q1_Base
= 0.1 V
Figure 27. Low Output Impedance Reference Voltage
V
CC
R
R
V
CC
/2
C
–
+
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