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Minimizing Quantization Effects Using the TMS320 DSP Family

Due to its discrete nature, DSPs represent variables and performs arithmetic functions with a finite word length. This produces three effects: the selection of filter transfer functions is quantized with filter poles and zeros existing only at specific locations in the z plane; the input is quantized; and noise is introduced from DSP multiplication and division operations. This document shows how to calculate the finite word length effects for the TMS320 DSP family and then minimize their significance through improved topology, differing word length, and improved DSP numerical properties. It provides the necessary equations to minimize the quantization effects and references for in depth study.

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