Estimating the noise-related error in continuous-time integrator-based ADCs

• Autorzy: Gosselin P. , Koukab A. , Kayal M.
• Języki publikacji: EN

Abstrakty

EN

From first-order incremental ΣΔ converters to controlled-oscillator-based converters, many ADC architectures are based on the continuous-time integration of the input signal. However, the accuracy of such converters cannot be properly estimated without establishing the impact of noise. In fact, noise is also integrated, resulting in a random error that is added to the measured value. Since drifting phenomena may make simulations and practical measurements unable to ensure longterm reliability of the converters, a theoretical tool is required. This paper presents a solution to compute the standard deviation of the noise-generated error in continuous-time integrator-based ADCs, under the assumption that a previous measure is used to calibrate the system. In addition to produce a realistic case, this assumption allows to handle a theoretical issue that made the problem not properly solvable. The theory is developed, the equations are solved in the cases of pure white noise, pure flicker noise and low-pass filtered white noise, and the implementation issues implied by the provided formulas are addressed.

Słowa kluczowe

EN

noise; white noise; flicker noise; error; accuracy; standard deviation; variance; integrator-based ADC; incremental; sigma-delta

PL

szum; szum biały; fliker-szum; błąd; dokładność; odchylenie standardowe; wariancja; ADC; Sigma-Delta

• Wydawca: Lodz University of Technology. Department of Microelectronics and Computer Science
• Czasopismo: International Journal of Microelectronics and Computer Science
• Rocznik: 2016
• Tom: Vol. 7, nr 2
• Strony: 54--59
• Opis fizyczny: Bibliogr. 8 poz., wykr.

Twórcy

autor

Gosselin P.

• Electronics Laboratory and Power Systems Laboratory, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

autor

Koukab A.

• Electronics Laboratory and Power Systems Laboratory, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

autor

Kayal M.

• Electronics Laboratory and Power Systems Laboratory, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

Bibliografia

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