Title :
A Fully Digital DTMF Receiver
Author :
Ekinci, Ahmet Suat ; Atalar, Abdullah
Author_Institution :
Bilkent University, Department of Electrical & Electronics Engineering., 06533 Bilkent, Ankara, Turkey. Phone: +90-312-266-4307 Fax: +90-312-266-4126
Abstract :
An algorithm for detection of Dual Tone Multifrequency (DTMF) tones suitable for VLSI is proposed. The algorithm is based on an approximation of the correlation. The input signal is correlated with the hardlimited versions of three sinusoids having ¿/3 phase difference. This requires only additions and subtractions. The algorithm is realized as a fully integrated digital DTMF receiver chip fabricated in 1-¿m CMOS technology.
Keywords :
Approximation algorithms; CMOS technology; Correlation; Digital filters; Filter bank; Gaussian noise; Phase detection; Phase frequency detector; Read only memory; Very large scale integration;
Conference_Titel :
Solid-State Circuits Conference, 1995. ESSCIRC '95. Twenty-first European
Conference_Location :
Lille, France
Print_ISBN :
2-86332-180-3
