Single-chip MEMS-based digital microphone shrinks to fit laptops, notebooks

摘要

The insides of laptop and table computers are inherently noisy environments. Keyboards and antennas create interference for electronically sensitive devices, such as the system microphone. Fortunately for designers, MEMS (m ic roe I ectro mechanical- system)-based digital microphones are inherently noise-resistant. Akustica has released its fourth-generation AKU230 chip, which the company claims is the only MEMS-based digital microphone to include the microphone membrane, amplifier, and sigma-delta converter on one die, which measures just 7 mm2. Bosch in 2009 purchased Akustica; the part is the first in the Bosch supply chain.