A power-efficient current-feedback instrumentation amplifier for precision bridge readout

Moaaz Ahmed; Saqib Mohamad; Amine Bermak

doi:10.1109/EDSSC.2015.7285174

A power-efficient current-feedback instrumentation amplifier for precision bridge readout

Moaaz Ahmed, Saqib Mohamad, Amine Bermak

Hong Kong University of Science and Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

7 Citations (Scopus)

Abstract

A current-feedback instrumentation amplifier (CFIA) for precision bridge-readout intended for MEMs flow sensor is presented. The proposed CFIA is chopped to bring input-referred offset below 12μV and flicker-noise corner around 2mHz. Implemented in chartered 0.18μm CMOS process, the CFIA draws 250μA supply current and achieves a competitive noise efficiency factor (NEF) of 30.5. The low-power consumption is attributed to the g_m/I_D based design methodology adopted in designing the folded-cascode amplifiers while considering careful trade-offs between power, thermal noise and input-referred offset.

Original language	English
Title of host publication	Proceedings of the 2015 IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	555-558
Number of pages	4
ISBN (Electronic)	9781479983636
DOIs	https://doi.org/10.1109/EDSSC.2015.7285174
Publication status	Published - 30 Sept 2015
Externally published	Yes
Event	11th IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015 - Singapore, Singapore Duration: 1 Jun 2015 → 4 Jun 2015

Publication series

Name	Proceedings of the 2015 IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015

Conference

Conference	11th IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015
Country/Territory	Singapore
City	Singapore
Period	1/06/15 → 4/06/15

Keywords

Instrumentation amplifier
chopping
current-feedback instrumentation amplifier
g/I design methodology
noise efficiency factor (NEF)

Access to Document

10.1109/EDSSC.2015.7285174

Cite this

Ahmed, M., Mohamad, S., & Bermak, A. (2015). A power-efficient current-feedback instrumentation amplifier for precision bridge readout. In Proceedings of the 2015 IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015 (pp. 555-558). Article 7285174 (Proceedings of the 2015 IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EDSSC.2015.7285174

Ahmed, Moaaz ; Mohamad, Saqib ; Bermak, Amine. / A power-efficient current-feedback instrumentation amplifier for precision bridge readout. Proceedings of the 2015 IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015. Institute of Electrical and Electronics Engineers Inc., 2015. pp. 555-558 (Proceedings of the 2015 IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015).

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title = "A power-efficient current-feedback instrumentation amplifier for precision bridge readout",

abstract = "A current-feedback instrumentation amplifier (CFIA) for precision bridge-readout intended for MEMs flow sensor is presented. The proposed CFIA is chopped to bring input-referred offset below 12μV and flicker-noise corner around 2mHz. Implemented in chartered 0.18μm CMOS process, the CFIA draws 250μA supply current and achieves a competitive noise efficiency factor (NEF) of 30.5. The low-power consumption is attributed to the gm/ID based design methodology adopted in designing the folded-cascode amplifiers while considering careful trade-offs between power, thermal noise and input-referred offset.",

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author = "Moaaz Ahmed and Saqib Mohamad and Amine Bermak",

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year = "2015",

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doi = "10.1109/EDSSC.2015.7285174",

language = "English",

series = "Proceedings of the 2015 IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015",

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Ahmed, M, Mohamad, S & Bermak, A 2015, A power-efficient current-feedback instrumentation amplifier for precision bridge readout. in Proceedings of the 2015 IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015., 7285174, Proceedings of the 2015 IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015, Institute of Electrical and Electronics Engineers Inc., pp. 555-558, 11th IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015, Singapore, Singapore, 1/06/15. https://doi.org/10.1109/EDSSC.2015.7285174

A power-efficient current-feedback instrumentation amplifier for precision bridge readout. / Ahmed, Moaaz; Mohamad, Saqib; Bermak, Amine.
Proceedings of the 2015 IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015. Institute of Electrical and Electronics Engineers Inc., 2015. p. 555-558 7285174 (Proceedings of the 2015 IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - A current-feedback instrumentation amplifier (CFIA) for precision bridge-readout intended for MEMs flow sensor is presented. The proposed CFIA is chopped to bring input-referred offset below 12μV and flicker-noise corner around 2mHz. Implemented in chartered 0.18μm CMOS process, the CFIA draws 250μA supply current and achieves a competitive noise efficiency factor (NEF) of 30.5. The low-power consumption is attributed to the gm/ID based design methodology adopted in designing the folded-cascode amplifiers while considering careful trade-offs between power, thermal noise and input-referred offset.

AB - A current-feedback instrumentation amplifier (CFIA) for precision bridge-readout intended for MEMs flow sensor is presented. The proposed CFIA is chopped to bring input-referred offset below 12μV and flicker-noise corner around 2mHz. Implemented in chartered 0.18μm CMOS process, the CFIA draws 250μA supply current and achieves a competitive noise efficiency factor (NEF) of 30.5. The low-power consumption is attributed to the gm/ID based design methodology adopted in designing the folded-cascode amplifiers while considering careful trade-offs between power, thermal noise and input-referred offset.

KW - Instrumentation amplifier

KW - chopping

KW - current-feedback instrumentation amplifier

KW - g/I design methodology

KW - noise efficiency factor (NEF)

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Ahmed M, Mohamad S, Bermak A. A power-efficient current-feedback instrumentation amplifier for precision bridge readout. In Proceedings of the 2015 IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015. Institute of Electrical and Electronics Engineers Inc. 2015. p. 555-558. 7285174. (Proceedings of the 2015 IEEE International Conference on Electron Devices and Solid-State Circuits, EDSSC 2015). doi: 10.1109/EDSSC.2015.7285174

A power-efficient current-feedback instrumentation amplifier for precision bridge readout

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