Title :
A 40 μA/channel compensated 18-channel strain gauge measurement system for stress monitoring in dental implants
Author :
Claes, W. ; Sansen, W. ; Puers, R.
Author_Institution :
ESAT-MICAS Lab., Katholieke Univ., Leuven, Belgium
Abstract :
This paper presents an ASIC of an autonomous monitoring system that is capable of measuring 18 strain gauges simultaneously. The sensor interface chip is implemented in a 0.7 μm CMOS technology and includes a PTAT-current reference, an 8-bit DAC, together with a digital interface for multi-gauge nulling, an SC instrumentation amplifier, an SC S/H and a 9-bit successive approximation ADC. The accuracy is better than 20 μstrain, while consuming only 40 μA/channel
Keywords :
application specific integrated circuits; biomedical measurement; biomedical transducers; dentistry; patient monitoring; prosthetics; strain gauges; 0.7 micron; 9 bit; ASIC; PTAT-current reference; SC instrumentation amplifier; autonomous monitoring system; dental implants; multi-gauge nulling; sensor interface chip; strain gauge measurement system; stress monitoring; successive approximation ADC; Bones; Capacitive sensors; Dentistry; Electrical resistance measurement; Force measurement; Implants; Monitoring; Prosthetics; Strain measurement; Stress measurement;
Conference_Titel :
Custom Integrated Circuits, 2001, IEEE Conference on.
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-6591-7
DOI :
10.1109/CICC.2001.929733
