LSI implementation of a programmable FIR digital filter
Y. Kadowaki, S. Matsuoka, Shōgo Nakamura · International Conference on Acoustics, Speech, and Signal Processing · 2003
The implementation of a programmable FIR (finite impulse response) digital filter based on a generalized transversal filter structure consisting of tapped, cascaded, identical FIR subfilters is presented. The LSI chip includes 56 different filters. One of the desired filters can be selected by six external ins on the LSI. The specifications of each filter are as follows: (1) the passband ripple is less than 0.5 dB; (2) the attenuation in the stopband is more than 50 dB; and (3) the normalized transition band is less than 0.1. A maximum sampling rate of 1.11 MHz is realized by virtue of the parallel processing of the subfilters. The 5.0*5.5 mm/sup 2/ chip was fabricated using 1.5- mu m double-level-metal CMOS technology.>