Self-powered CMOS impact-rate monitors for biomechanical implants

Chenling Huang, Shantanu Chakrabartty

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

We have previously reported a novel self-powered piezo-floating-gate sensor that can be used for long-term monitoring of strain levels in biomechanical implants. In this paper, we extend this work to monitor impact-rates (rate of change of strain levels) which is important for predicting mechanical fatigue. We augment the piezo-floating-gate sensor with a filtering and triggering circuit that activates the ionized-hot-electron-injection (IHEI) only when the impactrates exceed predetermined threshold levels. Using multiple prototypes fabricated in a 0.5-μm standard CMOS process we characterize the performance of the sensor for mismatch and for its variability under different biasing conditions. Experimental results obtained using the prototypes demonstrate that the sensor can record different impact-rate levels over a duration of 10 5 cycles.

Original languageEnglish
Title of host publication2008 IEEE-BIOCAS Biomedical Circuits and Systems Conference, BIOCAS 2008
Pages385-388
Number of pages4
DOIs
StatePublished - 2008
Event2008 IEEE-BIOCAS Biomedical Circuits and Systems Conference, BIOCAS 2008 - Baltimore, MD, United States
Duration: Nov 20 2008Nov 22 2008

Publication series

Name2008 IEEE-BIOCAS Biomedical Circuits and Systems Conference, BIOCAS 2008

Conference

Conference2008 IEEE-BIOCAS Biomedical Circuits and Systems Conference, BIOCAS 2008
Country/TerritoryUnited States
CityBaltimore, MD
Period11/20/0811/22/08

Fingerprint

Dive into the research topics of 'Self-powered CMOS impact-rate monitors for biomechanical implants'. Together they form a unique fingerprint.

Cite this