CMOS integrated galvanically isolated RF chip-to-chip communication utilizing lateral resonant coupling

Mahdi Javid, Richard Burton, Karel Ptacek, Jennifer Kitchen

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

5 Scopus citations

Abstract

In this work, a high voltage (HV) galvanically isolated chip-to-chip communication circuit utilizing laterally coupled resonators is reported. The adjacently placed resonators provide high voltage galvanic isolation (GI) using horizontal space between resonators filled with oxide, which minimizes the need for thick inter-metal dielectrics. A previously unexplored application for lateral coupling is introduced as a passive communication channel for GIs. Magnetic coupling between resonators is used to transfer an upconverted digitally-modulated OOK control signal at 2.8 GHz through the galvanic isolator. This proposed method can be integrated using CMOS processes, without altering the native process or adding extra fabrication steps. The system is realized in a 0.25 μm BCD (Bipolar-CMOS-DMOS) process with only four metal layers for proof of concept. The design does not require exotic packaging and provides 3.3kV RMS isolation, small physical area of 0.95mm2, and sub-20ns propagation delay. The implemented resonators inherently act as bandpass filters, thus enhancing circuit noise immunity to common mode transients.

Original languageEnglish (US)
Title of host publicationRFIC 2017 - Proceedings of the 2017 IEEE Radio Frequency Integrated Circuits Symposium
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages252-255
Number of pages4
ISBN (Electronic)9781509046263
DOIs
StatePublished - Jul 5 2017
Event2017 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2017 - Honolulu, United States
Duration: Jun 4 2017Jun 6 2017

Other

Other2017 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2017
CountryUnited States
CityHonolulu
Period6/4/176/6/17

Keywords

  • CMOS integrated circuits
  • Isolators
  • Passives
  • Radiofrequency
  • System-on-chip
  • Transformer

ASJC Scopus subject areas

  • Engineering(all)

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    Javid, M., Burton, R., Ptacek, K., & Kitchen, J. (2017). CMOS integrated galvanically isolated RF chip-to-chip communication utilizing lateral resonant coupling. In RFIC 2017 - Proceedings of the 2017 IEEE Radio Frequency Integrated Circuits Symposium (pp. 252-255). [7969065] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/RFIC.2017.7969065