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Chapter 5 Signals and Noise

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.

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Chapter 5 Signals and Noise

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  1. Chapter 5Signals and Noise

  2. Modulation – Converting a dc signal to a higher frequency • 1/f noise is less troublesome at higher frequencies

  3. Choppers

  4. Lock-in amplifier

  5. After 9 repeat measurements S/N increased by 3

  6. Signal Averaging Click graph

  7. Moving average

  8. Polynomial Smoothing D: 10th degree 77 pt smooth C: 4th degree 13 pt smooth B: quadratic 5 pt smooth A: raw data

  9. Polynomial Smoothing Click graph

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