Ekinci, Ahmet Suat2016-01-082016-01-081994http://hdl.handle.net/11693/17638Ankara : Department of Electrical and Electronics Engineering and the Institute of Engineering and Sciences of Bilkent University, 1994.Thesis (Master's) -- -Bilkent University, 1994.Includes bibliographical references leaves 49-50In 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^.66 leaves, illustrationsEnglishinfo:eu-repo/semantics/openAccessDual Tone Multifrequencycorrelation receiversfrequency detection.TK5102.5 .E35 1994Signal theory (Telecommunication).Correlators.Thesis