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Ultrasonic Sensing Using LOG Detector Amplifier
SLOA341
October 2024
LOG300
CONTENTS
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Ultrasonic Sensing Using LOG Detector Amplifier
1
Abstract
Trademarks
1
Introduction
2
Description
2.1
Basics of Ultrasound Sensing
2.2
Advantages and Disadvantages of Ultrasonic Sensing
2.3
Ultrasonic Transducer
2.3.1
Transducer Construction
2.3.2
Transducer Frequencies
2.4
Transducer Topologies
2.5
Blind Zone Effect on Minimum Distance
2.6
Transducer Drive
2.7
Ultrasonic Echo and Signal Processing
2.7.1
Digital Gain or Fixed Gain
2.7.2
Time-Varying-Gain
2.7.3
Automatic Gain Control or Logarithmic Amplifier
2.7.4
Logarithmic Amplifier vs Logarithmic Detector
3
LOG Detector Amplifier and the Advantages Over Conventional Opamps
4
Application
4.1
Double Paper Feed and Paper Thickness Detector
4.1.1
Schematic Implementation
4.1.2
Material Thickness Detector
4.2
Bubble Detector
4.3
Material Detection
4.4
Distance or Proximity Detection
5
Summary
6
References
IMPORTANT NOTICE
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Application Note
Ultrasonic Sensing Using LOG Detector Amplifier
