Submitted on: 27 July 2009.
Revised on: 07 November 2009.
Accepted on: 06 January 2010.
___________________IEEE Open Journal of Circuits and Systems
Submitted on: 20 May 2004.
Revised on: 21 June 2004.
Accepted on: 12 July 2004.
___________________IEEE Open Journal of Circuits and Systems
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Submitted on: 08 September 2003.
Revised on: 28 October 2003.
Accepted on: 09 November 2003.
___________________IEEE Open Journal of Circuits and Systems
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Submitted on: 24 April 2007.
Revised on: 27 May 2007.
Accepted on: 09 June 2007.
___________________IEEE Open Journal of Circuits and Systems
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