Sensing Temperature with Heat and Other Cool Things

March 12, 2010
Time: 2:00pm-3:00pm
414 CESPR/Schapiro
Hosted by: CISL
Speaker: Dr. Kofi Makinwa, TU-Delft

Abstract

Temperature sensors are everywhere! They are used in CPUs for thermal management, inDRAMs to control refresh rates, and in MEMS frequency references for temperaturecompensation, to name a few high volume applications. Conventional temperature sensorsare based on bipolar transistors, and must be trimmed to compensate for the inaccuracy(about 3 deg. C) caused by process spread. However, trimming is a time consuming processthat significantly increases manufacturing costs. This talk will discuss recent researchon temperature sensors based on the thermal diffusivity of silicon, i.e. the rate atwhich heat diffuses through silicon. Due to the purity of IC-grade silicon, such temperature sensors achieve untrimmed inaccuracies of 0.2 deg. C, which is much better than that of conventional sensors.

Biography

Kofi A.A. Makinwa is a Professor at Delft University of Technology, The Netherlands,where he leads a group that designs precision analog circuits, sigma delta modulators, and smartsensors. He holds B.Sc. and M.Sc. degrees from Obafemi Awolowo University, Nigeria, anM.E.E. degree from the Philips International Institute and a Ph.D. degree from DelftUniversity of Technology, both in The Netherlands. From 1989 to 1999 he was a researchscientist at Philips Research Laboratories. He holds 14 patents, has (co)-authored over100 technical papers, and has given tutorials at the ISSCC and several other conferences.Dr. Makinwa is a (co)-recipient of JSSC, ISSCC (3), ESSCIRC, ISCAS and IEEE Sensors bestpaper awards, and is a recipient of the Simon Stevin Gezel award from the DutchTechnology Foundation. He is a distinguished lecturer of the IEEE and a member of theYoung Academy of the Royal Netherlands Academy of Arts and Sciences.

Host: The NY IEEE SSCS/EDS Chapter


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