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Posted to rec.audio.pro,rec.audio.tech
Richard Crowley
 
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Default MIC-On-A-Chip

Posted over on alt.binaries.schematics.electronic by one of
the regulars who is an analog IC designer with commodity
and OEM designs that are likely to be found in most of our
homes and offices.

At 10% distortion, not of particular interest to the r.a.p
crowd, but since it is positioned to replace electret mic
capsules in consumer equipment (cell phones, etc.) it may
mark the begining of the demise of the electret capacitor
mic capsule as a commodity item as we know it today.

"Jim Thompson" wrote...
It's rare that I ever get to even acknowledge circuits
that I've designed.

Finally one of my clients, Akustica, has gone public
in the 04.27.06 edition of "electronic design"

See pp 36-38, "Breaking A New Sound Barrier: It's a
MIC-On-A-Chip"

I did the analog amplifier circuit design, including
charge-pump for the MEMS, and bandgap revisions.

Paul Spitalny, of Cascade Linear, Inc., Kirkland,
Washington, did the sigma-delta output version.


http://www.elecdesign.com/Articles/A...361/12361.html

 
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