University of Adelaide Library

Adelaide Research and Scholarship : Schools and Disciplines : School of Electrical and Electronic Engineering : Electrical and Electronic Engineering publications

Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/2440

Type: Journal article
Title: A MEMS brownian ratchet
Author: Allison, Andrew Gordon
Abbott, Derek
Citation: Microelectronics Journal, 2002; 33 (3):235-243
Publisher: Elsevier
Issue Date: 2002
ISSN: 0026-2692
School/Discipline: School of Electrical and Electronic Engineering
Statement of
Responsibility: 
Andrew Allison and Derek Abbott
Abstract: Brownian ratchet is a device that can rectify the random Brownian motion of particles to yield a directed steady-state flow. We can imagine a thermofluid field of particles, which interact with the ratchet. The laws of thermodynamics imply that the ratchet must use energy from some other source. The dynamics of continuous-time Brownian ratchets are determined by a stochastic partial differential equation. We have used a simplified discrete-time model of a Brownian ratchet called ‘Parrondo's games’, which are governed by a difference equation. In their original form, Parrondo's games are a finite set of simple games of chance. An indefinite pure sequence of any single game is neutral or even losing. A periodic or randomised sequence of mixed games can be winning. There is a steady state flow of probability in the preferred direction. We have been able to design a feasible and consistent device, by mapping the conservation law of total probability onto the law of conservation of charge. This device can absorb energy from a mechanical field to produce a directed flow of charge. The fundamental architecture is based on a ‘bucket-brigade’ device. The capacitors are 2-port MEMS devices. We use CMOS transmission gates to connect the capacitors in the required topology. We present an analysis and simulation of the MEMS Brownian ratchet and suggest some possible applications.
Keywords: Brownian ratchet; MEMS; Re-parameterisation
RMID: 0020020028
DOI: 10.1016/S0026-2692(01)00096-9
Description (link): http://www.elsevier.com/wps/find/journaldescription.cws_home/405904/description#description
Appears in Collections:Electrical and Electronic Engineering publications
View citing articles in: Web of Science
Google Scholar
Scopus

There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

© 2008 The University of Adelaide
library@adelaide.edu.au
CRICOS Provider Number 00123M
Service Charter | Copyright | Privacy | Disclaimer