Patent ID: 9577608
Date: 2017-02-21
CPC Classifications: H03H

Claim:
1. An apparatus for performing signal processing, comprising: a passive decimating discrete time (DT) filter configured to receive a first DT signal at a first sample rate, filter and decimate the first DT signal by a factor of N, and provide a second DT signal at a second sample rate lower than the first sample rate, N being greater than one, the first and second DT signals being analog samples having analog values for discrete times during the filtering and decimating; and an active DT filter configured to filter the second DT signal and provide a third DT signal at the second sample rate and based in part on a delayed sample of the second DT signal, the second and third DT signals being analog samples having analog values for discrete times and the third DT signal being a combination of both passive and active DT filtering.