Wireless Related Products

Contact

Aldacom GmbH
Hans-Boeckler-Strasse 16
63263 Neu-Isenburg/ Germany
-----------------------------------
German / English:
Tel +49 6102 7984895
-------------------------------
Fax +49 6102 7985780
-----------------------------------
E-mail




News Letter Sign Up Today!

* required

*







Email Marketing by VerticalResponse
 
DTMF Decoder PDF
                                                                                                                                                                             

DTMF decoder connected to GSM module

It is not easy to detect and recognize DTMF with satisfactory precision. Often, dedicated integrated circuits are used. It is rather complicated, so it is used only marginally. Most often, a MT 8870 or compatible circuit would be used.
The MT8870 is a complete DTMF receiver integrating both the bandsplit filter and digital decoder functions. The filter section uses switched capacitor  techniques for high and low group filters; the decoder uses digital counting techniques to detect and decode all 16 DTMF tone-pairs into a 4-bit code.  External component count is minimized by on chip provision of a differential input amplifier, clock oscillator and latched three-state bus interface.

Features of DTMF decoder

  • Complete DTMF Receiver
  • Low power consumption
  • Internal gain setting amplifier
  • Adjustable guard time
  • Central office quality
  • Power-down mode
  • Inhibit mode
  • Backward compatible with MT8870C/MT8870C-1

Typical Applications for DTMF decoders

  • Paging systems
  • Repeater systems/mobile radio
  • Credit card systems
  • Remote control
  • Personal computers
  • Telephone answering machine
 
< Prev   Next >

Flash GSM News

Embedded Dual Band WiFi Antenna ANT-BXE4705
Embedded WIFI (2.4 / 5.5 GHz) Antenna ANT-BXE4705
 
 
powered by kreativunion.de
© 2017
Joomla! is Free Software released under the GNU/GPL License. JoomSEF SEO by Artio (http://www.artio.net) - databases, information system and web applications