Xref: utzoo rec.audio:13762 sci.electronics:6837
Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!polyslo!mira.acs.calpoly.edu!mdeale
From: mdeale@mira.acs.calpoly.edu (Myron Deale)
Newsgroups: rec.audio,sci.electronics
Subject: Re: New Sony A/D Chip?
Keywords: A/D
Message-ID: <12325@polyslo.CalPoly.EDU>
Date: 6 Jul 89 17:45:42 GMT
References: <2181@radio.oakhill.UUCP>
Sender: news@polyslo.CalPoly.EDU
Reply-To: mdeale@mira.acs.calpoly.edu.UUCP (Myron Deale)
Organization: ACS, Cal Poly, San Luis
Lines: 25

In article <2181@radio.oakhill.UUCP> charlie@oakhill.UUCP (Charlie Thompson) writes:
>
>Rumor has it that Sony has a new A/D converter chip based on sigma delta
>technology.  Two questions: 1) Does anybody out there in net land know
>about said chip? 2) Is Sony planning to introduce a new product using
>this chip in the near future? 
> 
>Charlie Thompson

   I haven't heard anything about Sony parts, but Motorola and Crystal
Semiconductor have both announced ADC's for audio using sigma delta type
conversion, 16-bit resolution, and if I remember correctly both sample
at 50 KHz (the clock, of course, is around 4 MHz). They should be close
to production.

   At first I didn't like sigma delta type converters, until I found out
you don't need a sample/hold circuit nor analog filters. In addition, I
prefer Crystal Semi because they have on-chip calibration and I would
suspect they have this capacity in some form on their new chip.

Myron
<disclaimer.std>  I've no affiliation with either company ... and I
   apologize for having only nebulous info. If prompted, better info
   may be found.
// mdeale@cosmos.acs.calpoly.edu