Article View: sci.electronics
Article #7967Re: ..but what about _output_ filtering for D/A's?
From: Bob Myers
Date: Mon, 22 Oct 1990 18:50
Date: Mon, 22 Oct 1990 18:50
15 lines
1291 bytes
1291 bytes
>As Bob has pointed out, the key here is nonlinearities. Interestingly,
>the visual analog of this DOES work, i.e. the sum of two high frequency
>gratings (which cannot be resolved) can produce a visible beat.
Uh, Jeff, I'm still not certain I go along with this - isn't the above
phenomenon the result of interference (two items of slightly different
wavelengths - or in this case, spacing - resulting in constructive and
destructive addition of the signals at a much longer, and hence visible,
wavelength) rather than intermodulation (the actual multiplication of
sinusoids of different frequencies)?
Bob Myers KC0EW HP Graphics Tech. Div.| Opinions expressed here are not
Ft. Collins, Colorado | those of my employer or any other
myers@fc.hp.com | sentient life-form on this planet.
Technical Details
Message-ID:
<17660123@hpfcdj.HP.COM>Path:
arc1-ca.pugleaf.net!utzoo!attcan!uunet!samsung!dali.cs.montana.edu!uakari.primate.wisc.edu!zaphod.mps.ohio-state.edu!sdd.hp.com!hplabs!hpfcso!hpfcdj!myersReferences:
<1319@beguine.UUCP>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!samsung!dali.cs.montana.edu!uakari.primate.wisc.edu!zaphod.mps.ohio-state.edu!sdd.hp.com!hplabs!hpfcso!hpfcdj!myers From: myers@hpfcdj.HP.COM (Bob Myers) Newsgroups: sci.electronics Subject: Re: ..but what about _output_ filtering for D/A's? Message-ID: <17660123@hpfcdj.HP.COM> Date: 22 Oct 90 18:50:46 GMT References: <1319@beguine.UUCP> Organization: Hewlett Packard -- Fort Collins, CO Lines: 15