Title :
An integrated dual-tone multi-frequency decoder
Author :
Callahan, M. ; Davis, Howard
Author_Institution :
MOSTEK Corp., Carrollton, TX, USA
Abstract :
A CMOS IC that performs the previously costly task of decoding all eight standard tone dialing signals will be discussed. Algorithms provide speech rejection, while requiring a minimal number of inexpensive external components.
Keywords :
Active filters; Algorithm design and analysis; Band pass filters; CMOS integrated circuits; Decoding; Detection algorithms; Filtering theory; Frequency; Phase locked loops; Speech enhancement;
Conference_Titel :
Solid-State Circuits Conference. Digest of Technical Papers. 1978 IEEE International
Conference_Location :
San Francisco, CA, USA
DOI :
10.1109/ISSCC.1978.1155797
