A generic miniature multi-feature programmable wireless powering headstage ASIC for implantable biomedical systems

Rajkumar Kubendran, Harish Krishnan, Bhupendra Manola, Simon W.M. John, William J. Chappell, Pedro P. Irazoqui

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

Abstract

Wireless powering holds immense promise to enable a variety of implantable biomedical measurement systems with different power supply and current budget requirements. Effective power management demands more functionality in the headstage design like power level detection for range estimation and power save modes for sleep-wake operation. This paper proposes a single chip ASIC solution that addresses these problems by incorporating digitally programmable features and thus has the potential to enable wireless powering for many implantable systems. The ASIC includes an RF rectifier which has a peak efficiency of 17.9% at 900MHz and 11.0% at 2.4GHz, a robust 1V bandgap reference and LDO voltage regulator whose output can be programmed in the range of 1V-1.5V, and can drive upto 4mA of load current. The input RF power level detector has a threshold of 1.6V and the power management block can be programmed to give a 6%, 12.5% or 25% duty cycle power line to the transmitter resulting in upto 60% reduction in average power. The ASIC was fabricated using the TSMC 65nm process, occupies 1mm 2 die area and the headstage consumes 300A at 1.2V regulated supply.

Original languageEnglish (US)
Title of host publication33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2011
Pages5617-5620
Number of pages4
DOIs
StatePublished - 2011
Externally publishedYes
Event33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2011 - Boston, MA, United States
Duration: Aug 30 2011Sep 3 2011

Publication series

NameProceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
ISSN (Print)1557-170X

Other

Other33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2011
Country/TerritoryUnited States
CityBoston, MA
Period8/30/119/3/11

Keywords

  • implantable biomedical system
  • power gating
  • programmable ASIC
  • wireless RF powering headstage

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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