A novel Sigma-Delta based parallel analogue-to-residue converter

作者：Shahana T K; Jose Babita R; Jacob Poulose K; Sasi Sreela

来源：International Journal of Electronics, 2009, 96(6): 571-583.

DOI：10.1080/00207210902791710

• analogue-to-residue converter
• Sigma-Delta modulator
• decimation filter
• residue number system
• performance evaluation

An important 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 () modulator with appropriate dynamic range, but the filtering is done by a filter implemented using RNS arithmetic. 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 based analogue-to-residue converter are compared with the existing analogue-to-residue converters based on Nyquist rate ADCs.

• 出版日期2009