| 摘要 |
<p>Disclosed is an L order N times digital extracting filter, including a plurality of alternately cascaded accumulator groups and 2 times extractors, wherein L, N and M are natural numbers, N = 2M, an output signal of the 2 times extractor is a signal formed by extracting a value from every other value of an input signal thereof, and L stages of accumulators cascade to form an accumulator group, wherein the output signal end of a previous stage of accumulator is connected to the input signal end of a subsequent stage of accumulator. As compared to a cascade integrator comb extracting filter, the digital extracting filter in the present utility model can solve the stability problem of the cascade integrator comb extracting filter on the basis of realizing the performance of the cascade integrator comb extracting filter.</p> |
