Re: DTMF dead?
- From: Vladimir Vassilevsky <antispam_bogus@xxxxxxxxxxx>
- Date: Sat, 07 Jul 2007 10:09:49 -0500
Nico Coesel wrote:
I have an upcoming project in which I might want to use dtmf
transceiver chips as a simple means of communication. However, it
seems that dtmf transceiver chips are quite hard to get these days.
Even Digikey stocks none. Anyone knows a source that keeps making dtmf
transceivers for the years to come?
It is possible to encode and decode the DTMF with pretty much any microcontroller. For example, you can do this:
http://www.abvolt.com/research/Multitone%20detect-IEEE.pdf
However, if the goal is the communication, I would rather implement a PSK or FSK modem using a microcontroller. It would be much better and even simpler then the DTMF.
Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com
.
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