chapter 5 signals and noise
DESCRIPTION
Chapter 5 Signals and Noise. Modulation – Converting a dc signal to a higher frequency 1/f noise is less troublesome at higher frequencies. Choppers. Lock-in amplifier. After 9 repeat measurements. S/N increased by 3. Signal Averaging. C lick graph. Moving average. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Chapter 5 Signals and Noise](https://reader035.vdocument.in/reader035/viewer/2022062301/56815eeb550346895dcda26b/html5/thumbnails/1.jpg)
Chapter 5Signals and Noise
![Page 2: Chapter 5 Signals and Noise](https://reader035.vdocument.in/reader035/viewer/2022062301/56815eeb550346895dcda26b/html5/thumbnails/2.jpg)
![Page 3: Chapter 5 Signals and Noise](https://reader035.vdocument.in/reader035/viewer/2022062301/56815eeb550346895dcda26b/html5/thumbnails/3.jpg)
Modulation – Converting a dc signal to a higher frequency
• 1/f noise is less troublesome at higher frequencies
![Page 4: Chapter 5 Signals and Noise](https://reader035.vdocument.in/reader035/viewer/2022062301/56815eeb550346895dcda26b/html5/thumbnails/4.jpg)
Choppers
![Page 5: Chapter 5 Signals and Noise](https://reader035.vdocument.in/reader035/viewer/2022062301/56815eeb550346895dcda26b/html5/thumbnails/5.jpg)
![Page 6: Chapter 5 Signals and Noise](https://reader035.vdocument.in/reader035/viewer/2022062301/56815eeb550346895dcda26b/html5/thumbnails/6.jpg)
Lock-in amplifier
![Page 7: Chapter 5 Signals and Noise](https://reader035.vdocument.in/reader035/viewer/2022062301/56815eeb550346895dcda26b/html5/thumbnails/7.jpg)
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After 9 repeatmeasurements
S/N increased by 3
![Page 10: Chapter 5 Signals and Noise](https://reader035.vdocument.in/reader035/viewer/2022062301/56815eeb550346895dcda26b/html5/thumbnails/10.jpg)
Signal Averaging
Click graph
![Page 11: Chapter 5 Signals and Noise](https://reader035.vdocument.in/reader035/viewer/2022062301/56815eeb550346895dcda26b/html5/thumbnails/11.jpg)
Moving average
![Page 12: Chapter 5 Signals and Noise](https://reader035.vdocument.in/reader035/viewer/2022062301/56815eeb550346895dcda26b/html5/thumbnails/12.jpg)
Polynomial Smoothing
B: quadratic 5 pt smooth
A: raw data
C: 4th degree 13 pt smooth
D: 10th degree 77 pt smooth
![Page 13: Chapter 5 Signals and Noise](https://reader035.vdocument.in/reader035/viewer/2022062301/56815eeb550346895dcda26b/html5/thumbnails/13.jpg)
Polynomial Smoothing
Click graph