Tord Johnson, Doctoral student (not working at IDT anymore)

Tord Johnson was born in Jönköping Sweden in 1977. He received the M.Sc EE degree from Mälardalen University, in 2002. The same year, he joined the Department of Electronics as a Ph.D student in the circuit design area and in 2005 he received his licentiate degree. His main research focus includes modeling and designing frequency synthesizers for radio-frequency communication systems.

The main research area concerns the modeling and implementation of frequency synthesizers for multi-standard radio-frequency communication systems. Many of the sub-design blocks within the synthesizer are studied. For the moment the main focus is amied at the low-frequency sub-designs in the control loop. Much time is spent on developing accurate and fast models including the present nonlinearites in the synthesizer for issues such as the dynamic behavior and noise properties.

[Show all publications]

Latest publications:

Nonlinear State-Space Model of Charge-Pump Based Frequency Synthesizers (May 2005)
Tord Johnson, Johnny Holmberg
IEEE International Symposium on Circuits and Systems

Design and Analysis of Charge-Pump Based Frequency Synthesizers (Apr 2005)
Tord Johnson

Design of a Dual-Band 5/2.4 GHz CMOS VCO for 802.11 a/b/g WLAN Transceivers (Dec 2004)
Ali Fard, Tord Johnson, Denny Åberg
IEEE Asia-Pacific Conf. On Circuits and Systems 2004, Taiwan

A Low Power Wide-Band CMOS VCO for Multi-Standard Radios (Sep 2004)
Ali Fard, Tord Johnson, Denny Åberg
IEEE Radio and Wireless Conference

A Comparative Study of CMOS LC VCO Topologies for Wide-Band Multi-Standard Transceivers (Jul 2004)
Ali Fard, Tord Johnson, Martin Linder , Denny Åberg
IEEE 47th International Midwest Sysmposium on Circuit and Systems 2004, Japan

An Improved Low Voltage Phase-Frequency Detector with Extended Frequency Capability (Jul 2004)
Tord Johnson, Ali Fard, Denny Åberg
IEEE 47th International Midwest Sysmposium on Circuit and Systems, 2004 Japan