Patent ID: 6377619
Filing Date: 2002-04-23
Classification: H03H

Abstract:
A finite impulse response (FIR) filter, comprising:means for storing sample data, said means for storing sample data having a lookthrough mode and a delay mode; dynamically rewriteable means for storing coefficient values; a first multiplier, connected to said means for storing sample data and to said means for storing coefficient values for multiplying sample data supplied by said means for storing sample data by a coefficient value supplied by said means for storing coefficient values; and an adder coupled to the first multiplier for adding the output of said first multiplier and an input to said adder; wherein both of said means for storing sample data and said means for storing coefficient values are implemented as corresponding multiported register files, each of said multiported register files having a write port and at least two read ports, each of said read ports being able, at any time, to supply data from any location within said corresponding multiported register file.