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2nd Order Shelving Filter Design for DC in AC Sensing
SBOA571
august 2023
OPA2387
,
OPA387
,
OPA4387
CONTENTS
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2nd Order Shelving Filter Design for DC in AC Sensing
1
Abstract
Trademarks
1
Introduction
2
Example Considerations
3
Introducing a Preconditioning Circuit
3.1
First Order Shelving Filter
3.2
Second Order Shelving Filter
3.3
Noise Contribution of the Second Order Shelving Filter
3.4
DC and AC Gain
4
Design Procedure for the Second Order Shelving Filter
4.1
Definition of Boundary Conditions
4.2
Calculation of Component Values
5
Influence of Component Tolerances
6
Summary
7
References
IMPORTANT NOTICE
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Application Note
2nd Order Shelving Filter Design for DC in AC Sensing