Article View: sci.electronics
Article #17840Re: DTMF
From: Larry Lippman
Date: Wed, 22 Jul 1987 15:53
Date: Wed, 22 Jul 1987 15:53
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In article <1319@genrad.UUCP>, rep@genrad.UUCP (Pete Peterson) writes:
> Unless you have a pile of op amps and R's and C's which are burning a hole in
> your junk box (or other parts storage facility) and you are extremely
> poverty stricken and take great delight in building and tuning multiple
> bandpass filters, the integrated DTMF encoders/decoders are definitely the way
> to go.
Right on! Besides, most of the integrated receivers have far
superior selectivity (read spurious signal rejection) than any receivers
built with discrete tone detectors. Not only can integrated receivers
implement more filter poles than is convenient for discrete construction,
but some of the newer integrated receivers use switched-capacitor filters.
<> Larry Lippman @ Recognition Research Corp., Clarence, New York
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!seismo!rutgers!sunybcs!kitty!larry From: larry@kitty.UUCP (Larry Lippman) Newsgroups: sci.electronics Subject: Re: DTMF Message-ID: <1867@kitty.UUCP> Date: Wed, 22-Jul-87 11:53:45 EDT Article-I.D.: kitty.1867 Posted: Wed Jul 22 11:53:45 1987 Date-Received: Fri, 24-Jul-87 04:42:00 EDT References: <1377@mit-amt.MEDIA.MIT.EDU> <17966@cmcl2.NYU.EDU> <1319@genrad.UUCP> Organization: Recognition Research Corp., Clarence, NY Lines: 17 Keywords: dtmf remote control Summary: Use integrated receiver if possible...