Publication

Simple thermal noise estimation of OTA-based switched-capacitor filters

Christian Enz, Assim Boukhayma, François Krummenacher
2015
Conference Papers

Abstract

This paper presents a new analytical method to simply estimate the integrated thermal noise in switched-capacitor filters (SCF). It is shown how the Bode theorem, which is theoretically valid only for continuous-time passive filters, can be extended to also estimate the noise in active SCF built with operational transconductance amplifiers (OTAs).

Official source

https://infoscience.epfl.ch/entities/publication/7491c45a-14c6-4ba2-a7bd-2fdcc15186f4

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Christian Enz, Assim Boukhayma, François Krummenacher
2015
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/7491c45a-14c6-4ba2-a7bd-2fdcc15186f4

About this result

Related concepts (30)

Noise (electronics)

In electronics, noise is an unwanted disturbance in an electrical signal. Noise generated by electronic devices varies greatly as it is produced by several different effects. In particular, noise is inherent in physics and central to thermodynamics. Any conductor with electrical resistance will generate thermal noise inherently. The final elimination of thermal noise in electronics can only be achieved cryogenically, and even then quantum noise would remain inherent. Electronic noise is a common component of noise in signal processing.

Shot noise

Shot noise or Poisson noise is a type of noise which can be modeled by a Poisson process. In electronics shot noise originates from the discrete nature of electric charge. Shot noise also occurs in photon counting in optical devices, where shot noise is associated with the particle nature of light. In a statistical experiment such as tossing a fair coin and counting the occurrences of heads and tails, the numbers of heads and tails after many throws will differ by only a tiny percentage, while after only a few throws outcomes with a significant excess of heads over tails or vice versa are common; if an experiment with a few throws is repeated over and over, the outcomes will fluctuate a lot.

Colors of noise

In audio engineering, electronics, physics, and many other fields, the color of noise or noise spectrum refers to the power spectrum of a noise signal (a signal produced by a stochastic process). Different colors of noise have significantly different properties. For example, as audio signals they will sound differently to human ears, and as they will have a visibly different texture. Therefore, each application typically requires noise of a specific color.

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