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Article #347Re: Re: Digital Mixer Using Burr-Brown 200 Khz ADC (Ooops!)
From: Tom Anderson
Date: Sun, 01 Oct 1989 05:51
Date: Sun, 01 Oct 1989 05:51
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1575 bytes
>byron@pyr.gatech.EDU (Byron A Jeff) writes: > >----------- --------- --------- -------- -------- -------- -------- >|8 |--|Analog |--|Filters|--| |---| | | | | | >|Audio |--|Multi- | | and | | ADC | | DSP |--| DAC |--|Filter| >|channels |--|plexors|--| S/H |--| |---| | | | | | >----------- --------- --------- -------- -------- -------- -------- > ^^ ^^^ > Eight lines here. There should be two lines since it > is a dual ADC. > It seems to me that the filters need to go on the other side of the mux. Imagine that for a set of samples the left channel has inputs 1,2,3,4 of 0v,10v,0v,10v respectively. For a 200kHz A/D, the frequency of this is 100kHz. This won't get through a regular audio type anti-aliasing filter. What are people paying for a digital audio anti-aliasing filter? Tom Anderson Hewlett-Packard Signal Analysis Division toma@hpsad "It's only hardware" Opinions expressed here are my own and not HP's
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arc1-ca.pugleaf.net!utzoo!attcan!uunet!ginosko!uakari.primate.wisc.edu!ames!pasteur!ucbvax!hplabs!hpl-opus!hpnmdla!hpsad!tomaReferences:
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!ginosko!uakari.primate.wisc.edu!ames!pasteur!ucbvax!hplabs!hpl-opus!hpnmdla!hpsad!toma From: toma@hpsad.HP.COM (Tom Anderson) Newsgroups: comp.dsp Subject: Re: Re: Digital Mixer Using Burr-Brown 200 Khz ADC (Ooops!) Message-ID: <9520006@hpsad.HP.COM> Date: 1 Oct 89 05:51:13 GMT References: <8388@sunspot.megatest.UUCP> Organization: HP Signal Analysis Division - Rohnert Park, CA Lines: 21