Injection locked oscillator

Speaker:  Dongseok Shin (ECE, Virginia Tech)

Date: Friday, April 4, 2014
Time: 3 PM - 4 PM
Location: Whittemore 6th Floor Conference Room 

Abstract:

This presentation proposes an injection-locked frequency tripler with locking range control circuit for low phase noise and wideband operating range. The proposed locking range adjuster is based on peak detection by utilizing an envelope wave of the triple outputs under unlocked condition. For wide locking range, it carries out calibrating free-running frequency of the tripler to three times frequency of injection signal. As a result, the proposed circuit can achieve three times wider locking range than that of previous work. The findings are verified using Tower Jazz 0.18um model technology on 28GHz three-stage LC oscillator with 1.8V supply voltage. It exhibits phase noise penalty of 9.5dB with respect to an input injection signal. Also, its output locking range is 26.1-28.35GHz over conventional locking range of 27.6-28.35GHz.

Speaker:

Dongseok Shin received the B.S. degree in electronics engineering from the University of Seoul, Seoul, Korea, in 2004, and the M.S. degree in electronics and computer engineering from Korea University, Seoul, in 2006. He is currently working toward the Ph.D. degree in electrical engineering at the Virginia Polytechnic Institute and State University, Blacksburg, VA From 2006 to 2012, he was with the graphics design team, Hynix Semiconductor, Icheon, Korea. His current research interests are in the design of millimeter-wave VCOs and analog FFT.