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High voltage CMOS devices and systems for lab-on-a-chip applications Open Access


Other title
high voltage integrated circuits
clock slewing
lab-on-a-chip applications
Type of item
Degree grantor
University of Alberta
Author or creator
Al-Haddad, Wesam Ahmed
Supervisor and department
Elliott, Duncan (Electrical and Computer Engineering)
Examining committee member and department
Hegmann, Frank (Physics)
Elliott, Duncan (Electrical and Computer Engineering)
Barlage, Douglas (Electrical and Computer Engineering)
Department of Electrical and Computer Engineering

Date accepted
Graduation date
Master of Science
Degree level
We have developed several generations of high voltage (HV) integrated circuits that provide micro-scale platforms for lab-on-a-chip applications. This thesis presents novel HV devices and circuits that lead to further miniaturization and minimize the dependence on off-chip components. A 4-terminal device is designed and built by introducing a contact in the drift region while ensuring its complete depletion. A linear 40V DRIFT device demonstrates functionality and is integrated into a new static level shifter circuit that is smaller and does not require a voltage bias as is used in the current static level shifter. An on-chip charge pump that can generate voltages beyond 50V is proposed as an alternative to boost converters that require large external inductors. Design techniques such as clock slewing are introduced to mitigate the effects of parasitic bipolar transistors while maintaining sufficient charge transfer between stages.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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