Design and Noise Analysis of a Novel Auto-Zeroing Structure for Continuous-Time Instrumentation Amplifiers

• Autorzy: Maréchal S. , Nys O. , Krummenacher F. , Chevroulet M. , Kayal M.

Identyfikatory

DOI

10.2478/eletel-2013-0049

• Języki publikacji: EN

Abstrakty

EN

This paper introduces a low-noise, low-power amplifier for high-impedance sensors. An innovative circuit using an auto-zeroed architecture combined with frequency modulation to reject offset and low-frequency noise is proposed and analysed. Special care was given to avoid broadband noise aliasing and chopping in the signal path, and to minimize both the resulting equivalent input offset voltage and equivalent input biasing current. The theoretical noise analysis of the proposed topology covers most of the noise sources of the circuit. Simulations show that the input-referred noise level of the circuit is 13.4nV/√Hz for a power consumption of 85µA with a power supply from 1.8V to 3.6V.

Słowa kluczowe

EN

front-end; instrumentation amplifier; low-noise; low power; chopper; auto-zero

• Wydawca: Polish Academy of Sciences, Committee of Electronics and Telecommunication
• Czasopismo: International Journal of Electronics and Telecommunications
• Rocznik: 2013
• Tom: Vol. 59, No. 4
• Strony: 397--404
• Opis fizyczny: Bibliogr. 11 poz., wykr.

Twórcy

autor

Maréchal S.

• Electronics Laboratory, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

autor

Nys O.

• Semtech Neuchâtel Sàrl, Gouttes d’Or 40, 2000 Neuchâtel, Switzerland

autor

Krummenacher F.

• Electronics Laboratory, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

autor

Chevroulet M.

• Semtech Neuchâtel Sàrl, Gouttes d’Or 40, 2000 Neuchâtel, Switzerland

autor

Kayal M.

• Electronics Laboratory, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

Bibliografia

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