Poulose Jacob,K; Shahana, T K; Babita, Jose R; Sreela Sasi(Taylor & Francis, May 1, 2009)
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Abstract:
Animportant step in the residue number system(RNS) based signal processing is the
conversion of signal into residue domain. Many implementations of this conversion
have been proposed for various goals, and one of the implementations is by a direct
conversion from an analogue input. A novel approach for analogue-to-residue
conversion is proposed in this research using the most popular Sigma–Delta
analogue-to-digital converter (SD-ADC). In this approach, the front end is the same
as in traditional SD-ADC that uses Sigma–Delta (SD) modulator with appropriate
dynamic range, but the filtering is doneby a filter implemented usingRNSarithmetic.
Hence, the natural output of the filter is an RNS representation of the input signal.
The resolution, conversion speed, hardware complexity and cost of implementation
of the proposed SD based analogue-to-residue converter are compared with the
existing analogue-to-residue converters based on Nyquist rate ADCs
Description:
International Journal of Electronics
Vol. 96, No. 6, June 2009, 571–583