A 4.6mW, 22dBm IIP3 all MOSCAP based 34-314MHz tunable continuous time filter in 65nm

Rakesh Kumar Palani; Ramesh Harjani

doi:10.1109/CICC.2015.7338402

A 4.6mW, 22dBm IIP3 all MOSCAP based 34-314MHz tunable continuous time filter in 65nm

Rakesh Kumar Palani, Ramesh Harjani

Electrical and Computer Engineering

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

4 Scopus citations

Abstract

A inverter based filter design is proposed that uses only MOSCAPs as filter capacitors. Further in the design the load capacitance compensates the negative feedback network allowing the majority of current to flow into the load. This results in an increase in the overall power efficiency. As a proof of concept, a 3rd order inverter based 34-314 MHz tunable continuous time channel select filter for software-defined radios is fabricated in TSMCs 65nm technology. By using the high density tunable MOSCAPs at a low swing node, the filter achieves an OIP3 of +25.24 dBm while drawing 4.2mA from a 1.1V supply and occupies an area of 0.007mm². The measured intermodulation distortion varies by 5dB across a 120° variation in temperature and 6.5dB across a 200mV variation in power supply. Further, the filter presents a high impedance node at the input and a low impedance node at the output easing system integration.

Original language	English (US)
Title of host publication	2015 IEEE Custom Integrated Circuits Conference, CICC 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781479986828
DOIs	https://doi.org/10.1109/CICC.2015.7338402
State	Published - Nov 25 2015
Event	IEEE Custom Integrated Circuits Conference, CICC 2015 - San Jose, United States Duration: Sep 28 2015 → Sep 30 2015

Publication series

Name	Proceedings of the Custom Integrated Circuits Conference
Volume	2015-November
ISSN (Print)	0886-5930

Other

Other	IEEE Custom Integrated Circuits Conference, CICC 2015
Country/Territory	United States
City	San Jose
Period	9/28/15 → 9/30/15

Bibliographical note

Funding Information:
This research was supported in part by a grant from DARPA.

Publisher Copyright:
© 2015 IEEE.

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10.1109/CICC.2015.7338402

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Palani, R. K., & Harjani, R. (2015). A 4.6mW, 22dBm IIP3 all MOSCAP based 34-314MHz tunable continuous time filter in 65nm. In 2015 IEEE Custom Integrated Circuits Conference, CICC 2015 Article 7338402 (Proceedings of the Custom Integrated Circuits Conference; Vol. 2015-November). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CICC.2015.7338402

A 4.6mW, 22dBm IIP3 all MOSCAP based 34-314MHz tunable continuous time filter in 65nm. / Palani, Rakesh Kumar; Harjani, Ramesh.
2015 IEEE Custom Integrated Circuits Conference, CICC 2015. Institute of Electrical and Electronics Engineers Inc., 2015. 7338402 (Proceedings of the Custom Integrated Circuits Conference; Vol. 2015-November).

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

Palani, RK & Harjani, R 2015, A 4.6mW, 22dBm IIP3 all MOSCAP based 34-314MHz tunable continuous time filter in 65nm. in 2015 IEEE Custom Integrated Circuits Conference, CICC 2015., 7338402, Proceedings of the Custom Integrated Circuits Conference, vol. 2015-November, Institute of Electrical and Electronics Engineers Inc., IEEE Custom Integrated Circuits Conference, CICC 2015, San Jose, United States, 9/28/15. https://doi.org/10.1109/CICC.2015.7338402

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abstract = "A inverter based filter design is proposed that uses only MOSCAPs as filter capacitors. Further in the design the load capacitance compensates the negative feedback network allowing the majority of current to flow into the load. This results in an increase in the overall power efficiency. As a proof of concept, a 3rd order inverter based 34-314 MHz tunable continuous time channel select filter for software-defined radios is fabricated in TSMCs 65nm technology. By using the high density tunable MOSCAPs at a low swing node, the filter achieves an OIP3 of +25.24 dBm while drawing 4.2mA from a 1.1V supply and occupies an area of 0.007mm2. The measured intermodulation distortion varies by 5dB across a 120° variation in temperature and 6.5dB across a 200mV variation in power supply. Further, the filter presents a high impedance node at the input and a low impedance node at the output easing system integration.",

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A 4.6mW, 22dBm IIP3 all MOSCAP based 34-314MHz tunable continuous time filter in 65nm

Abstract

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