The Cost of Limit-Cycle Elimination in IIR Digital Filters Using
Andrew Graham Dempster · 1997
Multiplier blocks :significantly reduce the cost of multiplication in digital filters, especially in structures that allow large numbers of products of a single inultipl icand. Some such structures, the direct form and cascaded second- order sections, have previously been shown to be less costly than the wave structure. In this paper, the effects of eliminating zero-input limit-cycles (LC), hereinafter called simply limit-cycles, from these structures is examined. Tlie direct form no longer competes with the wave structure, but the cascade structure is still found to be tlie most cost- efficient.