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參數(shù)資料
| 型號(hào)： | 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)： | 9/28頁 |
| 文件大小： | 168K |
| 代理商： | AND8054 |
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AND8054/D
http://onsemi.com
9
Absolute Oscillator (with C
4
)
Step 1: Find LG and s
The loop gain is found by breaking the loop and inserting a “test’’ voltage into the input.
A1
–
1
sR1C1
A2
–
1
sR2C2
A3
–
R4
R3
1
sR4C4
1
V
TEST
V
OUT
V
1
V
2
V
3
LG
VOUT
VTEST
A1
A2
A3
s
N(s)
D(s)
1
LG
1
R4
s3R1R2R3R4C1C2C4
s2R1R2R3C1C2
s3R1R2R3R4C1C2C4
s3R1R2R3R4C1C2C4
s2R1R2R3C1C2
s2R1R2R3C1C2
R4
N(s)
s3R1R2R3R4C1C2C4
s2R1R2R3C1C2
R4
LG
–
1
sR1C1
–
1
sR2C2
–R4
R3
1
sR4C4
1
–
R4
s3R1R2R3R4C1C2C4
s2R1R2R3C1C2
A3
Z4
Z3
R4|| C4
R3
Absolute Oscillator (without C
4
)
Step 2: Solve N(s) using Method I
Solve Method I: Solve the remainder of:
N(s)
s
2
2
o
N(s)
s2R1R2R3C1C2
R4
s2
2
o
R4
2
o
R1R2R3C1C2
0
o
R4
R1R2R3C1C2
Set the remainder to equal zero and solve for
o
:
R1R2R3C1C2
R1R2R3C1C2s2
R1R2R3C1C2s2
2
o
R1R2R3C1C2
R4
R4
2
o
R1R2R3C1C2
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