No abstract

This paper presents a newly developed chip which performs long Finite Impulse Response (FIR) filtering (up to 512 coefficients). By using an innovative architecture based on small Fast Fourier Transforms (FFT) and short FIR filters, one can achieve such a function on a single chip at a reasonable price : FDF (short for Frequency Domain Filter), 1 cm2 in area with 1 million transistors, has been designed in a 3.3V 0 . 5~ triple metal level technology.