Noise charateristics in sensors

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SUMMARY

Noise in sensors, particularly accelerometers, often exhibits Gaussian characteristics, especially in high-frequency data. This phenomenon is common across various electronic devices, including transducers, ADCs, and operational amplifiers. However, if the noise power exceeds kTB (Boltzmann's constant multiplied by temperature in Kelvin and bandwidth), it is essential to investigate other potential non-Gaussian noise sources, such as resistors, which contribute Nyquist noise.

PREREQUISITES
  • Understanding of electronic noise types, including Gaussian and Nyquist noise
  • Familiarity with accelerometer data analysis in MATLAB
  • Knowledge of Boltzmann's constant and its application in noise calculations
  • Basic concepts of transducers and analog-to-digital converters (ADCs)
NEXT STEPS
  • Research the characteristics of Nyquist noise in resistors
  • Explore advanced noise analysis techniques in MATLAB for sensor data
  • Learn about the implications of kTB in electronic circuit design
  • Investigate non-Gaussian noise sources in electronic systems
USEFUL FOR

Engineers, data analysts, and researchers working with sensor technology, particularly those involved in noise analysis and electronic device performance optimization.

likephysics
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Is noise in sensors always gaussian?
I was playing with acceleromter data in matlab. I decomposed the data into high frequency and low frequency. The high frequency noise distribution looks like a gaussian.
Is this common to sensors?
 
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likephysics said:
Is this common to sensors?

Its common in most electronic devices, actually. Transducers, ADC's, Op-amps, etc.
 
Here is a comprehensive summary of electronic noise:
http://en.wikipedia.org/wiki/Quantum_1/f_noise
If your noise power is significantly above kTB (Boltzmann's constant, temperature kelvin, bandwidth), look for other sources that may be instrumental, and may not be Gaussian. Resistors are inherently noisy (Nyquist noise).
 

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