University of Minnesota
Institute of Technology
myU OneStop


Electrical and Computer Engineering

Low Power Medical Electronics

Sayfe Kiaei, Ph.D.
Professor,  Electrical, Energy, and Computer Engineering (ECEE)
Director of Connection One NSF Center 
Associate Dean, Ira A. Fulton School of Engineering
Arizona State University

This presentation will be an overview of two recent research projects on Bio-Medical Integrated Circuits at ASU. The first part of the presentation will be an overview of  a low power Medical Implantable Communication Services (MICS) transceivers. A Dual band MICS transceiver with a reconfigurable RF front-end is presented. The receiver reuses the same circuit core for I) super-regenerative wake-up receiver, II) receive-mode LNA, and III) transmit power amplifier.  The transceiver uses an All Digital Frequency Locked-Loop (ADFLL) for LO signal generation and transmitter’s modulation. The device is fabricated in a 0.18?m CMOS process. The measured sensitivity of the On-Off Keying (OOK  - wakeup receiver) is at  -80dBm, while the BFSK receiver’s sensitivity is -97dBm with 2mW total power consumption. The nominal output power of the transmitter is -5dBm.
The second part of the presentation will be an overview of a dual-channel directional digital hearing (DHA). The DHA uses MEMS microphones, and an adaptive-power analog processing signal chain. The analog front-end consists of a DDA based capacitance to voltage conversion circuit, 40dB VGA and a power scalable continuous time sigma delta ADC, with 68dB SNR dissipating 67?W from a 1.2V supply. The MEMS microphones are fabricated in ASU clean-room using custom MEMS process. 

Dr. Sayfe Kiaei is the Associate Dean of Research at the Ira A. Fulton Schools of Engineering. He has been with ASU since January 2001.  He is a Professor and the Director of the Connection One Center (NSF I/UCRC Center), and Motorola Chair in Analog and RF Integrated Circuits.  From 1993 to 2001, he was a Senior Member of Technical Staff with the Wireless Technology Center and Broadband Operations at Motorola where he was responsible for the development of RF & Transceiver Integrated Circuits, GPS RF IC, and Digital Subscriber Lines (DSL) transceivers.  Before joining Motorola, Dr. Kiaei was an Associate Professor at Oregon State University from 1987-1993 where he taught courses and performed research in digital communications, VLSI system design, advanced CMOS IC design, and wireless systems.  Dr. Kiaei assisted in the establishment of the Industry-University Center for the Design of Analog/Digital ICs (CDADIC) and served as a Co-Director of CDADIC for 10 years.  He has published over 100 journal and conference papers and holds several patents and his research interests are in wireless transceiver design, RF and Mixed-Signal IC’s in CMOS and SiGe. His research projects are funded by a large number of industrial sponsors including Motorola Inc., Intel, the National Science Foundation, Texas Instruments and SRC. He has published more than 75 journal and conference papers and holds several patents. Dr. Kiaei is an IEEE Fellow and a member of IEEE Circuits and Systems Society, IEEE Solid State Circuits Society, and IEEE Communication Society. Dr. Kiaei has been organizer, on the technical program committee and/or chair of many conferences, including: RFIC, MTT, ISCAS, and other international conferences.
Research Interests:  Wireless Transceiver Design, RF and Mixed-Signal IC’s.
Honors and Distinctions:
Four research awards; Carter Best Teacher Award, Oregon State College of Engineering; IEEE Darlington Award; IEEE Fellow, and Motorola 10X Design award.
IEEE Fellow selection Committee Chair, CAS, IEEE 2009
Ph.D.:    Washington State University, 1987