APPARATUS FOR SUPPRESSING LIMIT CYCLES DUE TO QUANTIZATION IN DIGITAL FILTERS

摘要

Limit cycles due to quantization (primarily multiplication truncation or round-off), occurring in the output signal quantities of a digital filter in the presence of applied sample quantities of low magnitude, are suppressed by clamping to zero the quantities recirculating in or emanting out of the the filter, after a predetermined number of consecutively applied samples of magnitude below a predetermined threshold magnitude have been detected.