In March 2005, National Semiconductor announced
http://www.national.com/news/item/0,1735,1021,00.html
hybrid amplifer / PCM encoder chips to enable manufacturers to create
electret condenser microphones with digital output.
http://www.national.com/appinfo/amps/microphone.htmlhttp://www.national.com/appinfo/amps/files/digitalmic.pdf
The idea is that the only analog amplification and conversion to a
digital signal occurs within the electret condenser microphone capsule
itself.
To me, it seems like "technology done right" to prevent interference
by doing conversion to digital as close to the microphone as possible,
and you can't get much closer than inside the capsule!
Has anyone seen or heard of an electret condenser mic capsule that
incor****ates this technology?
I cannot locate one anywhere.
The www.bsecm.com website that National references doesn't seem to
work for me with Internet Explorer 7.
It seems to me that with such a capsule, ultraminiature Linux
computers such as picotux
http://www.picotux.com
and power over ethernet, it would be possible to create a web server
that streams output from a stereo microphone in a package scarcely
larger than an RJ-45 ethernet jack! Surely I cannot be the first
person to think of this....
