Whispers Generic Control Processor (GCP) - a unique ASIC solution to analogue filtering using digital techniques
P.R. Maddox · 1996
Whispers (GCP) is an integrated ADC, DSP, and DAC providing a complete analogue processing solution for audio frequency applications. It provides all the advantages of digital filtering techniques and the reprogrammability associated with it, but without the overhead of a traditional DSP solution and in many cases a system latency and power consumption not otherwise achievable. Whispers achieves an overall noise performance of 80dB, and features low latency processing making it particularly suitable for repetitive, time critical applications. The custom DSP core performs a single-cycle multiply-accumulate, and has been extended to efficiently address cascaded second order IIR filter applications. The core also features multiple instruction execution, and a single level instruction pipeline enabling zero-overhead subroutine branching. (7 pages)