Faculty of Engineering and Natural Sciences
EE 551 Graduate Seminar
A Multi-channel Chopper Modulated Amplifier System for in-vitro Neural Recording
Mustafa Dağtekin, Istanbul University, Computer Engineering
Neural recording systems measure very low-amplitude signals of less than 5 kHz bandwidth. Low-frequency noise processes such as flicker noise and DC offset can degrade the quality of recordings made by such systems. In this work, I describe a chopper modulated amplifier system and show that it can reduce the flicker noise in neural recording systems by 10 to 20 dB. Such an amplifier system was implemented using the MOSIS ABN 1.5 micron technology, manufactured on 2.2mmx2.2mm chip and tested using synthetic test signals. It was shown to work over a 100kHz bandwidth, with 56 dB amplification and around 20 dB noise reduction below 200 Hz.
Mustafa Dağtekin received the B.S. degree in Electronics and Telecommunications Engineering from Istanbul Technical University, Istanbul, Turkey in 1996 and MS and PhD degree in Computer Engineering from North Carolina State University, Raleigh, NC USA, in 1999 and 2006, respectively.
In 2007, he joined the Istanbul University Computer Engineering Department, Istanbul, Turkey as an Assistant Professor. His research interests include biosensors, implantable microelectronics, mixed-signal IC design and FPGA based systems.
December 12th, 2007, 13:40, FENS G032