A sub-threshold low-power integrated bandpass filter for highly-integrated spectrum analyzers

Gavin B. Long; M. Nance Ericson; Charles L. Britton; Benjamin D. Roehrs; Ethan D. Farquhar; S. Shane Frank; Alec Yen; Benjamin J. Blalock

doi:10.1109/ICECS49266.2020.9294964

A sub-threshold low-power integrated bandpass filter for highly-integrated spectrum analyzers

Gavin B. Long, M. Nance Ericson, Charles L. Britton, Benjamin D. Roehrs, Ethan D. Farquhar, S. Shane Frank, Alec Yen, Benjamin J. Blalock

Sensors and Electronics

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

5 Scopus citations

Abstract

Low-power analog filter banks provide frequency analysis with minimal power and space requirements, making them viable solutions for integrated remote audio- and vibration-sensing applications. Compared with their digital counterparts, analog filter banks are better suited to achieve the lower power consumption necessary for IoT applications. In this work, the design and implementation of a sub-threshold complementary metal-oxide semiconductor (CMOS) integrated low-power tunable bandpass filter channel for signal spectrum analysis and signal discrimination is presented, including performance improvements to stability and precise matching between filter stages. The 8th-order filter channel achieves an effective Q-factor of 4.5 and dynamic range of 60 dB, has an operational frequency range from 2 kHz to 100 kHz, and consumes 256 µW nominally at the highest center frequency. An integrated analog Gm-C filter topology is selected for this application. Functionally, the high-Q bandpass filter transfer function is implemented via four cascaded 2nd-order filter cells and is fabricated in 130-nm 1.2-V CMOS technology, making it suitable for use in monolithic integrated spectral analysis (MISA) applications.

Original language	English
Title of host publication	ICECS 2020 - 27th IEEE International Conference on Electronics, Circuits and Systems, Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781728160443
DOIs	https://doi.org/10.1109/ICECS49266.2020.9294964
State	Published - Nov 23 2020
Event	27th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2020 - Glasgow, United Kingdom Duration: Nov 23 2020 → Nov 25 2020

Publication series

Name	ICECS 2020 - 27th IEEE International Conference on Electronics, Circuits and Systems, Proceedings

Conference

Conference	27th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2020
Country/Territory	United Kingdom
City	Glasgow
Period	11/23/20 → 11/25/20

Funding

This manuscript has been authored in part by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

Keywords

Analog integrated circuits
Analog signal processing
Bandpass filters
CMOS integrated circuits
Gm-C filters
Programmable filters
Spectral analysis

Access to Document

10.1109/ICECS49266.2020.9294964

Cite this

Long, G. B., Ericson, M. N., Britton, C. L., Roehrs, B. D., Farquhar, E. D., Frank, S. S., Yen, A., & Blalock, B. J. (2020). A sub-threshold low-power integrated bandpass filter for highly-integrated spectrum analyzers. In ICECS 2020 - 27th IEEE International Conference on Electronics, Circuits and Systems, Proceedings Article 9294964 (ICECS 2020 - 27th IEEE International Conference on Electronics, Circuits and Systems, Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICECS49266.2020.9294964

Long, Gavin B. ; Ericson, M. Nance ; Britton, Charles L. et al. / A sub-threshold low-power integrated bandpass filter for highly-integrated spectrum analyzers. ICECS 2020 - 27th IEEE International Conference on Electronics, Circuits and Systems, Proceedings. Institute of Electrical and Electronics Engineers Inc., 2020. (ICECS 2020 - 27th IEEE International Conference on Electronics, Circuits and Systems, Proceedings).

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abstract = "Low-power analog filter banks provide frequency analysis with minimal power and space requirements, making them viable solutions for integrated remote audio- and vibration-sensing applications. Compared with their digital counterparts, analog filter banks are better suited to achieve the lower power consumption necessary for IoT applications. In this work, the design and implementation of a sub-threshold complementary metal-oxide semiconductor (CMOS) integrated low-power tunable bandpass filter channel for signal spectrum analysis and signal discrimination is presented, including performance improvements to stability and precise matching between filter stages. The 8th-order filter channel achieves an effective Q-factor of 4.5 and dynamic range of 60 dB, has an operational frequency range from 2 kHz to 100 kHz, and consumes 256 µW nominally at the highest center frequency. An integrated analog Gm-C filter topology is selected for this application. Functionally, the high-Q bandpass filter transfer function is implemented via four cascaded 2nd-order filter cells and is fabricated in 130-nm 1.2-V CMOS technology, making it suitable for use in monolithic integrated spectral analysis (MISA) applications.",

keywords = "Analog integrated circuits, Analog signal processing, Bandpass filters, CMOS integrated circuits, Gm-C filters, Programmable filters, Spectral analysis",

author = "Long, {Gavin B.} and Ericson, {M. Nance} and Britton, {Charles L.} and Roehrs, {Benjamin D.} and Farquhar, {Ethan D.} and Frank, {S. Shane} and Alec Yen and Blalock, {Benjamin J.}",

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Long, GB, Ericson, MN , Britton, CL, Roehrs, BD, Farquhar, ED, Frank, SS, Yen, A & Blalock, BJ 2020, A sub-threshold low-power integrated bandpass filter for highly-integrated spectrum analyzers. in ICECS 2020 - 27th IEEE International Conference on Electronics, Circuits and Systems, Proceedings., 9294964, ICECS 2020 - 27th IEEE International Conference on Electronics, Circuits and Systems, Proceedings, Institute of Electrical and Electronics Engineers Inc., 27th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2020, Glasgow, United Kingdom, 11/23/20. https://doi.org/10.1109/ICECS49266.2020.9294964

A sub-threshold low-power integrated bandpass filter for highly-integrated spectrum analyzers. / Long, Gavin B.; Ericson, M. Nance ; Britton, Charles L. et al.
ICECS 2020 - 27th IEEE International Conference on Electronics, Circuits and Systems, Proceedings. Institute of Electrical and Electronics Engineers Inc., 2020. 9294964 (ICECS 2020 - 27th IEEE International Conference on Electronics, Circuits and Systems, Proceedings).

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

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AU - Farquhar, Ethan D.

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AU - Yen, Alec

AU - Blalock, Benjamin J.

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N2 - Low-power analog filter banks provide frequency analysis with minimal power and space requirements, making them viable solutions for integrated remote audio- and vibration-sensing applications. Compared with their digital counterparts, analog filter banks are better suited to achieve the lower power consumption necessary for IoT applications. In this work, the design and implementation of a sub-threshold complementary metal-oxide semiconductor (CMOS) integrated low-power tunable bandpass filter channel for signal spectrum analysis and signal discrimination is presented, including performance improvements to stability and precise matching between filter stages. The 8th-order filter channel achieves an effective Q-factor of 4.5 and dynamic range of 60 dB, has an operational frequency range from 2 kHz to 100 kHz, and consumes 256 µW nominally at the highest center frequency. An integrated analog Gm-C filter topology is selected for this application. Functionally, the high-Q bandpass filter transfer function is implemented via four cascaded 2nd-order filter cells and is fabricated in 130-nm 1.2-V CMOS technology, making it suitable for use in monolithic integrated spectral analysis (MISA) applications.

AB - Low-power analog filter banks provide frequency analysis with minimal power and space requirements, making them viable solutions for integrated remote audio- and vibration-sensing applications. Compared with their digital counterparts, analog filter banks are better suited to achieve the lower power consumption necessary for IoT applications. In this work, the design and implementation of a sub-threshold complementary metal-oxide semiconductor (CMOS) integrated low-power tunable bandpass filter channel for signal spectrum analysis and signal discrimination is presented, including performance improvements to stability and precise matching between filter stages. The 8th-order filter channel achieves an effective Q-factor of 4.5 and dynamic range of 60 dB, has an operational frequency range from 2 kHz to 100 kHz, and consumes 256 µW nominally at the highest center frequency. An integrated analog Gm-C filter topology is selected for this application. Functionally, the high-Q bandpass filter transfer function is implemented via four cascaded 2nd-order filter cells and is fabricated in 130-nm 1.2-V CMOS technology, making it suitable for use in monolithic integrated spectral analysis (MISA) applications.

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Long GB, Ericson MN , Britton CL, Roehrs BD, Farquhar ED, Frank SS et al. A sub-threshold low-power integrated bandpass filter for highly-integrated spectrum analyzers. In ICECS 2020 - 27th IEEE International Conference on Electronics, Circuits and Systems, Proceedings. Institute of Electrical and Electronics Engineers Inc. 2020. 9294964. (ICECS 2020 - 27th IEEE International Conference on Electronics, Circuits and Systems, Proceedings). doi: 10.1109/ICECS49266.2020.9294964

A sub-threshold low-power integrated bandpass filter for highly-integrated spectrum analyzers

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