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Article #529Re: 1 Bit D to A Revisited
From: Jeffrey Mulligan
Date: Mon, 20 Nov 1989 20:38
Date: Mon, 20 Nov 1989 20:38
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1293 bytes
zawada@EN.ECN.PURDUE.EDU (Paul J Zawada) writes: >A day or two ago, I heard another one bit D-to-A algorithm from a >strictly unreliable source. (A musician friend of mine.) Since >1 bit D-to-A was a recent topic, I thought I'd share this one with >with the net. He claims this new revolutionary algorithm uses one >bit to tell whether the output voltage should be incremented or >decremented from its current state. Sounds like a delta modulator (not new). >Now I'm only an undergrad in EE and I haven't studied dsp much, but >I cannot see how to actually implement this. I see a few problems. Input voltage is tracked on a capacitor. Capacitor voltage is compared to input. Comparator output dumps fixed current on/off the capacitor. -- Jeff Mulligan (jbm@aurora.arc.nasa.gov) NASA/Ames Research Ctr., Mail Stop 239-3, Moffet Field CA, 94035 (415) 694-3745
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arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!swrinde!emory!wuarchive!decwrl!shelby!eos!jbmReferences:
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!swrinde!emory!wuarchive!decwrl!shelby!eos!jbm From: jbm@eos.UUCP (Jeffrey Mulligan) Newsgroups: comp.dsp Subject: Re: 1 Bit D to A Revisited Message-ID: <5610@eos.UUCP> Date: 20 Nov 89 20:38:41 GMT References: <8911201702.AA03844@en.ecn.purdue.edu> Organization: NASA Ames Research Center, California Lines: 23