APPLICATION-SPECIFIC CAD OF VLSI 2ND-ORDER SECTIONS

An application-specific, very-high-level CAD (computer-aided design) tool is presented for producing very-high-throughput IIR (infinite-impulse response) filters. The architecture is a cascade of blocked, pipelined, second-order sections. It is necessary only to specify the word size w, the block size B, and each second-order section's coefficients. Using this information, the CAD tool will generate Celtech intermediate-form files for a filter system that at 10 MHz can process 5B/w million samples/s: the benefits of applying both bit-level array architecture and application-specific CAD to the problem of IIR filtering are illustrated. The resulting CAD system reduces the costs of very-high-throughput IIR filters with respect to design, fabrication, and operation.