Patent ID: 7685217
Filing Date: 2010-03-23
Classification: H03H,H04L

Abstract:
1. A channel-select decimation filter for operating in multiple bandwidth modes, the channel-select decimation filter comprises: a first low pass filter stage including a first programmable delay module and operably coupled to filter input signals to produce first low pass filtered signals; a variable gain stage operably coupled to apply a programmable gain to the input signals to produce gained input signals; subtraction module operably coupled to subtract the first low pass filtered signals from the gain input signals to produce first stage signals; a second low pass filter stage including a second programmable delay module operably coupled to filter the first stage signals to produce channel-selected signals; and a down-sampling module operably coupled to decimate the channel-selected signals to produce down-sampled channel-selected signals; and wherein the first programmable delay module, the second programmable delay module and the programmable gain are programmed to implement one of the multiple bandwidth modes, wherein the first select number is equal to the second select number and is chosen to provide the channel-select filter with a bandwidth corresponding to a select bandwidth mode of the multiple bandwidth modes.