Digital dual tone multi freguency receiver
Digital dual tone multi freguency receiver
In this thesis, a suitable algorithm for detection of Dual Tone Multifrequency tones is proposed and implemented as a VLSI chip. The algorithm is based on an approximation of correlation. The input signal is correlated with the hardlimited versions of three sinusoids having 7Ty^3 phase difference. Also, a level detector is added to the algorithm. The algorithm only requires addition and subtraction, but no multiplication; and this reduces the complexity of the circuit. The implementation of the algorithm proposed has been realized as a fully integrated digital DTMF receiver chip using semi-custom layout techniques. The final chip is fabricated in 1-^m CMOS technology, and it has a total area of 24.78 mm^.
Includes bibliographical references leaves 49-50
Cataloged from PDF version of article.
Ekinci, Ahmet Suat
- Bilkent University Turkey
frequency detection., Elektrik ve Elektronik Mühendisliği, Signal theory (Telecommunication), Frequency assignment, Signal receiver, Receivers, frequency detection, 620, Correlators., Dual Tone Multifrequency, Signal theory (Telecommunication)., correlation receivers, Correlators, TK5102.5 .E35 1994, Electrical and Electronics Engineering
frequency detection., Elektrik ve Elektronik Mühendisliği, Signal theory (Telecommunication), Frequency assignment, Signal receiver, Receivers, frequency detection, 620, Correlators., Dual Tone Multifrequency, Signal theory (Telecommunication)., correlation receivers, Correlators, TK5102.5 .E35 1994, Electrical and Electronics Engineering
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