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VLSI-realizable multiplier-free interpolators for high-order sigma-delta D/A converters

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4 Author(s)
Saramaki, T. ; Tampere Univ. of Technol., Finland ; Karema, T. ; Ritoniemi, T. ; Tenhunen, H.

A class of efficient linear-phase FIR interpolators for superresolution sigma-delta digital-to-analog (D/A) converters are introduced. These interpolators contain no general multipliers and very few data memory locations, thereby making them easily VLSI-realizable. This is achieved by using several interpolation stages with each stage containing a small number of delays and arithmetic operations. The proposed interpolators can be used, with very slight changes, for many interpolation ratios. As an example, an interpolator is designed for a 20-b overall performance in the case of a fifth-order noise shaper

Published in:

Electrotechnical Conference, 1991. Proceedings., 6th Mediterranean

Date of Conference:

22-24 May 1991