Title :
Piezo-powered floating gate injector for self-powered fatigue monitoring in biomechanical implants
Author :
Lajnef, Nizar ; Chakrabartty, Shantanu ; Elvin, Niell ; Elvin, Alex
Author_Institution :
Civil & Environ. Eng. Dept., Michigan State Univ., East Lansing, MI
Abstract :
In this paper we describe an implementation and modeling of a novel fatigue monitoring sensor based on integration of piezoelectric transduction with floating gate avalanche injection. The miniaturized sensor enables continuous battery-less monitoring and failure predictions of biomechanical implants. Measured results from a fabricated prototype in a 0.5mum CMOS process demonstrate excellent agreement with the theoretical model in computing cumulative statistics of electrical signals generated by the piezoelectric transducer. The power dissipation of the sensor is less than 1muW which makes it attractive for integration with biocompatible poly-vinylidene diflouride (PVDF) based transducers.
Keywords :
CMOS integrated circuits; biomechanics; biomedical transducers; biosensors; fatigue; piezoelectric transducers; prosthetics; 0.5 micron; CMOS process; batteryless monitoring; biomechanical implants; cumulative statistics; electrical signals; failure predictions; fatigue monitoring sensor; floating gate avalanche injection; piezo-powered floating gate injector; piezoelectric transducer; piezoelectric transduction; poly-vinylidene diflouride transducers; power dissipation; Biosensors; CMOS process; Condition monitoring; Electric variables measurement; Fatigue; Implants; Piezoelectric transducers; Prototypes; Semiconductor device modeling; Sensor phenomena and characterization;
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
DOI :
10.1109/ISCAS.2007.378189
