This is a veiled introduction to data acquisition. Furthermore, students will be exposed to the ideas of filtering, noise, sampling and autocorrelation.Students will be required to analyze the autocorrelation of the noise signal, generated from a pseudorandom binary signal. This will be followed by low-pass filtering using a simple RC circuit and calculating the autocorrelation of the filtered signal.
|Sample Results||Gain of a low pass filter as a function of frequency
Circuit for pseudo-random noise generation based on shift registers
|Version||1st October 2008|
Further Readings and References
- Signal enhancement in the presence of high noise levels: the electrocardiogram The Physics Teacher , A. Thompson and A. Trolestra , 34 418 , (1996).
- Noise reduction by signal accumulation The Physics Teacher , Y. Kraftmakher , 44 528 , (2006).
- Autocorrelation of electrical noise: an undergraduate experiment American Journal of Physics , J.L Passmore, B.C. Collings, P.J. Collings , 63 592 , (1995).
- A course in computer based data acquisition American Journal of Physics , W.N. Hubin , 70 80 , (2002).
- Two student experiments on electrical fluctuations American Journal of Physics , Y. Kraftmakher , 63 932 , (1995).