VLSI Implementation of State-Space Digital Filter ー Analysis of Round Off Error ー

Abstract

For state-space digital filter applying distributed arithmetic instead of an ordinary multiplier, the round off error is different from the result of ordinary analysis and is lost high accuracy in nature. In this paper, the relation of SNR and word length is shown by some examples and new analysis is presented. From the result of analysis, the noise whose characteristics and source are unknown exists in state-space digital filter with distributed arithmetic.