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- Newsgroups: sci.electronics
- Path: sparky!uunet!clsi!kevin
- From: kevin@clsi.COM (Kevin Cameron)
- Subject: Re: "1-bit DAC"
- Message-ID: <1993Jan8.021750.16438@clsi.COM>
- Originator: kevin@dubhe
- Sender: usenet@clsi.COM
- Reply-To: kevin@clsi.com
- Organization: CAD Language Systems Inc.
- References: <C0F8Hp.84n@ve7frg.ampr.org> <1ii574INNdgp@shelley.u.washington.edu>
- Date: Fri, 8 Jan 93 02:17:50 GMT
- Lines: 32
-
-
- In article <1ii574INNdgp@shelley.u.washington.edu>, whit@carson.u.washington.edu (John Whitmore) writes:
- > In article <C0F8Hp.84n@ve7frg.ampr.org> doug@ve7frg.ampr.org (Doug Collinge - VE7GNU) writes:
- > >If my CD with a "1 bit DAC" and the aid of "8 times oversampling"
- > >can produce audio as good as an older CD with no "oversampling" and
- > >a 16-bit DAC then can my circuit with an 8-bit DAC be replaced
- > >with a 1-bit DAC and 4-times oversampling?
- >
- > Welcome to marketing buzzword confusion hour.
- >
- > A "1-bit DAC" is a sigma-delta D/A converter, and if
- > you want to use it for CD output, it has to be 16-bit capable.
- > Because, the input to it will be a 16-bit number, more than likely.
- >
- > There are no CD players that have 'no oversampling';
- > perhaps an early multi-kilobuck unit or two with no oversampling
- > were produced, but I've never seen one.
-
- Sony did dual 16bit DAC units a few years ago.
-
- > An eight-bit DAC is rarely linear to 16-bit precision,
- > and will not successfully reproduce CD sound.
-
- But a 8bit DAC linear to 16bits is cheaper to produce than a 16bit DAC (linear
- to 16bits) - less silicon.
-
- Kev.
- --
- Kevin Cameron CLSI,Suite 100,5457 Twin Knolls Rd.,Columbia MD 21045,USA
- kevin@clsi.com Tel: (USA) (410) 992 5700 (- 5709) X224
- uunet!clsi.com!kevin Fax: (410) 992 3536
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