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Title: Design and analysis of CMOS voltage controlled oscillators for industrial use
Author: Boyd, Liam
ISNI:       0000 0004 5356 6171
Awarding Body: University of Bristol
Current Institution: University of Bristol
Date of Award: 2014
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Wireless and communication systems are being run at ever increasing in frequencies, but the conventional complimentary metal oxide semiconductor (CMOS) phase locked loop (PLL) architectures are starting to reach a performance limit. A key part of the PLL is the voltage controlled oscillator (VCO) - for this to achieve high frequency performance, low value inductors are required. However, achieving a large tuning range, high Q, and low noise, with these inductors is extremely difficult. This thesis provides a literature review and background to CMOS VCO design, and in particular, using transmission lines as the critical element for generating oscillations. It then goes on to detail the research and development of two test chips, each consisting of eight individual VCOs outputting a differential signal, divided in frequency by four, to dedicated ports on a purpose built printed circuit board. These circuit boards were built using low cost, industry standard materials and the chips tested using standard lab equipment. This project led to the creation of the fastest VCOs ever designed and tested at Fujitsu Semiconductor Europe and highlighted some of the key issues in transforming a technology from a mature academic knowledge into an industrially ready product.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available