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

Rakesh Kumar Palani, Ramesh Harjani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 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 languageEnglish (US)
Title of host publication2015 IEEE Custom Integrated Circuits Conference, CICC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479986828
DOIs
StatePublished - Nov 25 2015
EventIEEE Custom Integrated Circuits Conference, CICC 2015 - San Jose, United States
Duration: Sep 28 2015Sep 30 2015

Publication series

NameProceedings of the Custom Integrated Circuits Conference
Volume2015-November
ISSN (Print)0886-5930

Other

OtherIEEE Custom Integrated Circuits Conference, CICC 2015
CountryUnited States
CitySan Jose
Period9/28/159/30/15

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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 [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