DTMF (Dual Tone Multiple Frequency) Encoder and Decoder informally named as Touch Tone allocates a unique tone to each button on an appliance (made up of two frequencies high and low).

DTMF Decoder and Encoder This repository contains all the codes and files for DTMF Decoder and Encoder project which can be used in Signals and System Subject. Basic Introduction: • DTMF Encoder ...

D156-tone multi-frequency (DTMF) Signals are used in touch-tone telephones as well as many other areas. The design method of the traditional DTMF signal encoding and decoding circuit is more complex ...

His DTMF decoder box uses a CM8870 DTMF decoder chip, which you might assume is all you need to get the job done.

It relies on the fact that almost every ham radio designed for field use incorporates a DTMF encoder in the microphone or in the transceiver itself.

The AMBE-3003 Vocoder Chip offers three separate encoder/decoder operations to enable up to three full-duplex channels. With 62 built-in voice/FEC rates, designers can easily configure the chip to ...