Programmable circuit for realizing a digital filter

摘要

An apparatus having plurality of filter processing elements is provided in order to obtain adequate calculation power, particularly to enable a plurality of filters to be calculated by multiplexing. The calculation of a filter is effected in a plurality of iterations; a filter section is calculated in each iteration while the same operator is used for iteratively calculating a plurality of operations and a plurality of multiplexed filters; in each iteration a plurality of data sets is used. Each filter processing element comprises a number of partial-result registers (y-data) equal to the number of filters that can be multiplexed. Each register has a write input connected to the output (y) of a final adder and each register has a read output connected to one of the inputs (y-old) of the final adder.