Details of Grant 

EPSRC Reference:	GR/M45368/01
Title:	EFFICIENT DESIGN AND IMPLEMENTATION OF HIGH-FREQUENCY, HIGH DYNAMIC RANGE LOG-DOMAIN FILTERS
Principal Investigator:	Burdett, Dr A
Other Investigators:	Toumazou, Professor C
Researcher Co-Investigators:
Project Partners:	Mitel
Department:	Physics
Organisation:	Imperial College London
Scheme:	Standard Research (Pre-FEC)
Starts:	01 April 1999	Ends:	30 November 2002	Value (£):	139,016
EPSRC Research Topic Classifications:	VLSI Design
EPSRC Industrial Sector Classifications:	Electronics
Related Grants:
Panel History:
Summary on Grant Application Form
The aim of this project is to develop a design methodology for the implementation of continuous-time fully-integrated tuneable filters based on the direct exploitation of non-linear device characteristics. This approach has been recently proposed for bipolar technology as the 'log-domain' technique, in which the exponential relationship between collector current and base-emitter voltage is directly incorporated into the state-space description of a network transfer function. The use of large signal device equations leads to the potential for wide dynamic range under low power supply voltages. A first aim of the research project will be to develop high performance log-domain filters using a fast complementary bipolar technology, for application in broadband RF/IF receiver architectures where high frequency operation, broad-bandwidth and wide dynamic range are required simultaneously. A second aim will be to extend this bipolar log-domain approach to subthreshold CMOS technology, to implement circuit building blocks for analogue micropower signal processing. Here the application area will be for very low poser baseband and video processors. A third aim will be to formalise these synthesis methods into a systematic approach suitable for computer-aided circuit design, in which a log-domain filter can be synthesised directly from a filter specification.
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Organisation Website:	http://www.imperial.ac.uk