Title :
A new sigma-delta thermal conductivity microsystem
Author :
Condemine, C. ; Belleville, Marc ; Barbier, D. ; Delhomme, G. ; Dittmar, A.
Author_Institution :
CEA, Centre d´´Etudes Nucleaires de Grenoble, France
Abstract :
Presents the design and performance of a new sensor interface involving sigma-delta A-to-D conversion and PI (Proportional Integral) or PID (Proportional Integral Derivative) control in the same loop. As example the new PI-sigma-delta structure integrated a thermal flow microsensor used for skin conductivity measurement, the HEMATRON sensor. The resolution of the microsystem is 14 bits with a 75 Hz bandwidth and a control time smaller than 1 second. The proposed circuit is suitable for large number of applications where control and accurate digital sensor readout are needed
Keywords :
biomedical electronics; biomedical measurement; haemorheology; microsensors; sigma-delta modulation; skin; thermal conductivity measurement; two-term control; 1 s; 75 Hz; HEMATRON sensor; accurate digital sensor readout; biomedical instrumentation; proportional integral derivative control; sigma-delta thermal conductivity microsystem; skin blood microcirculation; skin conductivity measurement; thermal flow microsensor; Conductivity measurement; Delta-sigma modulation; Microsensors; PD control; Pi control; Proportional control; Skin; Thermal conductivity; Thermal sensors; Three-term control;
Conference_Titel :
Microtechnologies in Medicine and Biology, 1st Annual International, Conference On. 2000
Conference_Location :
Lyon
Print_ISBN :
0-7803-6603-4
DOI :
10.1109/MMB.2000.893768
