Once every week while school is in session, EECS invites a distinguished researcher or practitioner in a computer science or electrical and computer engineering-related field to present their ideas and/or work. Talks are generally targeted to electrical engineering and computer science graduate students. This colloquium series is free and open to everyone.

Upcoming Colloquia

Frequency multipliers for crystal oscillators

Wednesday, July 25, 2018 - 10:30pm to 11:30pm
KEC 1005

Speaker Information

Pavan Hanumolu
Electrical and Computer Engineering
University of Illinois Urbana-Champaign


Low-noise high-frequency reference clocks are needed in all high-performance clock multipliers. Such reference clocks are typically provided by crystal oscillators (XOs). While higher frequency reference clocks greatly help in improving the noise performance of clock multipliers, XO output frequencies are typically limited to few 10s of MHz. To alleviate this limitation, I’ll present techniques to double and quadruple the XO output frequency with minimal noise and power penalty. I’ll describe calibration schemes that can overcome circuit imperfections and improve immunity to process, voltage, and temperature variations. To validate the presented ideas, I will show experimental results obtained from two prototype integrated circuits.

Speaker Bio

Pavan Hanumolu is currently a Professor in the Department of Electrical and Computer Engineering at the University of Illinois, Urbana-Champaign. He received Ph.D. degree from the School of Electrical Engineering and Computer Science at Oregon State University, in 2006, where he subsequently served as a faculty member till 2013. Dr. Hanumolu’s research interests are in energy-efficient integrated circuit implementation of analog and digital signal processing, sensor interfaces, wireline communication systems, and power conversion.

Past Colloquia

Tuesday, May 16, 2017 - 11:30am to 12:30pm
Shreekant ‘Ticky’ Thakkar
Monday, April 17, 2017 - 4:00pm to 4:50pm
Tawfiq Musah
Monday, April 10, 2017 - 4:00pm to 4:50pm
Marouane Kesentini
Monday, March 13, 2017 - 4:00pm to 4:50pm
Don Heer, MEE (1) and Karl Mundorff, MBA (2)
Monday, March 6, 2017 - 4:00pm to 4:50pm
Amin Alipour
Monday, February 20, 2017 - 4:00pm to 4:50pm
Bruce E. Hofer
Monday, February 13, 2017 - 4:00pm to 4:50pm
Nasir Memon
Monday, February 6, 2017 - 4:00pm to 4:50pm
Molly Megraw
Monday, January 30, 2017 - 4:00pm to 4:50pm