Supermic+more: PDM Bitstream ASICs for Audio Signal Processing

PDM microphones have remarkable properties for beamforming. By manipulating the bitstream directly at 3072 kHz rather than converting to PCM first, delay-and-sum beamforming becomes simpler and more precise. This project implements these operations as ASICs using the Skywater 130nm CMOS process, with eight designs submitted for fabrication.