Title :
An intracorporal telemetry for strain gage transducer
Author :
Begueret, J.B. ; Benbrahim, R. ; Li, Zhiqun ; Rodes, F. ; Dom, J.P.
Author_Institution :
Lab. de Microelectronique, IXL-ENSERB, Talence, France
Abstract :
A new strain gage bridge to PPM (Pulse Position Modulation) converter has been developed. It consists of a chopper amplifier and a voltage to time converter associated in a feed-back loop. This topology exhibits mainly an automatic offset cancellation capability, a ratiometric transfer function and an accuracy of 10 bits. Therefore, this converter is insensitive to offset drifts, and is well suited for long term monitoring of orthopedic implants
Keywords :
biomechanics; biomedical electronics; biomedical telemetry; patient monitoring; strain gauges; strain measurement; automatic offset cancellation; chopper amplifier; circuit topology; drift; feedback loop; intracorporal telemetry; long term monitoring; orthopedic implant; ratiometric transfer function; strain gage bridge to PPM converter; strain gage transducer; voltage to time converter; Bridge circuits; Capacitive sensors; Choppers; Pulse amplifiers; Pulse modulation; Pulse width modulation converters; Telemetry; Topology; Transducers; Voltage;
Conference_Titel :
Custom Integrated Circuits Conference, 1996., Proceedings of the IEEE 1996
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-3117-6
DOI :
10.1109/CICC.1996.510562
