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振蕩器電路設計低電壓運算放大器和精密傳感器應用比較
文件頁數(shù): 11/28頁
文件大?。?/td> 168K
代理商: AND8054
AND8054/D
http://onsemi.com
11
Absolute Oscillator
Step 3b: Subcircuit Amplifier Design Equations
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Absolute Oscillator
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Y
Y
X
X
Without C
4
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With C
4
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Pole Location
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V3
sR1C1
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V1
1
1
2 fR1C1
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V3
sR1C1
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V1
1
1
2 fR1C1
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Integrator A
2
Gain
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fp2
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A3
V2
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A2
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fp2
2 R2C2
V2
1
1
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A2
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V2
1
1
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Pole Location
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A3
V2
R3
2 R2C2
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Inverter A
3
Gain
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2 R4C4
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1
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RC Sensitivities*
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C1
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–s
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C2
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*
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C1
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C2
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*Sensitivity is defined as:
SY
X
d ln(Y)
d ln(X)
Absolute Oscillator
Step 4: Verify LG 1
Step 4 will be demonstrating using the dual power supply
limit circuit shown in Figure 25. The design equations are
listed below.
Assume:
VPos_Limit
VNeg_Limit
VLimit
|A3|
R4R3
1
V2
VLimit
(i.e. |A2|
VLimit)
1.)
2.)
3.)
Check:
Is |LG|
A1
A2
A3
VLimit
1
2 fR1C1
(VLimit)R3
VLimit
1.)
Using the values shown in Figure 25,
1
2 (16.6 kHz)(39 K
) (240 pF)
(VLimit) (1)
VLimit
2.)
1.02 VLimit
VLimit
thus the oscillation will be sustained.
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