Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2748

Full Length Research Paper

Synthesis of Chebyshev-I filter using folding and retiming

Nongmaithem Lalleima Chanu
  • Nongmaithem Lalleima Chanu
  • Department of ECE, M-Tech Digital Electronics, DIT Dehradun, India – 248009.
  • Google Scholar
Vimal Kant Pandey
  • Vimal Kant Pandey
  • Department of ECE, M-Tech Digital Electronics, DIT Dehradun, India – 248009.
  • Google Scholar


  •  Received: 25 February 2014
  •  Accepted: 09 April 2014
  •  Published: 30 April 2014

Abstract

In synthesizing Digital signal processing (DSP) architecture, maintaining low silicon area and high performance becomes an important factor which can be achieved by various optimization techniques. To achieve this, we employ two design optimization techniques: folding and retiming, which are applied to 3rd order Chebyshev I high pass digital filter to minimize the functional units (adders, multipliers) and to reduce the number of registers. Folding transformation is used to determine the control circuits in DSP architecture by executing multiple algorithm operation on a single functional unit. Retiming using register minimization is applied after folding, thereby reducing the numbers of multipliers and adders from 7 to 1 and 6 to 1, respectively, without affecting the input and output characteristics of the filter.

 

Key words: Data flow graph (DFG), Chebyshev filter, folding, retiming, lifetime analysis.