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Subthreshold FIR filter architecture for ultra low power applications

Subthreshold FIR filter architecture for ultra low power applications
Subthreshold FIR filter architecture for ultra low power applications
Subthreshold design has been proposed as an effective technique for designing signal processing circuits needed in wireless sensor nodes powered by sources with limited energy. In this paper we propose a subthreshold FIR architecture which brings the benefits of reduced leakage energy, reduced minimum energy point, reduced operating voltage and increased operating frequency when compared with recently reported subthreshold designs. We shall demonstrate this through the design of a 9-tap FIR filter operating at 220 mV with operational frequency of 126 kHz/sample consuming 168.3 nW or 1,33 pJoules/sample. Furthermore, the area overhead of the proposed method is less than that of the transverse structure often employed in subthreshold filter designs. For example, a 9-tap filter based on transverse structure has 5* higher area than the filter designed using our proposed method.
1-10
Mishra, B.
74d07fde-09e3-4ec8-a228-056816e99bf2
Al-Hashimi, B.M.
e8058bef-ffc0-4c7c-9233-4cef40d689b4
Mishra, B.
74d07fde-09e3-4ec8-a228-056816e99bf2
Al-Hashimi, B.M.
e8058bef-ffc0-4c7c-9233-4cef40d689b4

Mishra, B. and Al-Hashimi, B.M. (2009) Subthreshold FIR filter architecture for ultra low power applications. Integrated Circuit and System Design. Power and Timing Modeling, Optimization and Simulation. 18th International Workshop, PATMOS 2008. Revised Selected Papers, 1-10.

Record type: Article

Abstract

Subthreshold design has been proposed as an effective technique for designing signal processing circuits needed in wireless sensor nodes powered by sources with limited energy. In this paper we propose a subthreshold FIR architecture which brings the benefits of reduced leakage energy, reduced minimum energy point, reduced operating voltage and increased operating frequency when compared with recently reported subthreshold designs. We shall demonstrate this through the design of a 9-tap FIR filter operating at 220 mV with operational frequency of 126 kHz/sample consuming 168.3 nW or 1,33 pJoules/sample. Furthermore, the area overhead of the proposed method is less than that of the transverse structure often employed in subthreshold filter designs. For example, a 9-tap filter based on transverse structure has 5* higher area than the filter designed using our proposed method.

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More information

Published date: 2009
Additional Information: Imported from ISI Web of Science
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 270195
URI: https://eprints.soton.ac.uk/id/eprint/270195
PURE UUID: 2aea2bf8-a8ab-4e5c-9189-8a9e59fac27b

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Date deposited: 21 Apr 2010 07:46
Last modified: 18 Jul 2017 06:51

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