Title :
Integrated dual tone multi-frequency telephone dialer
Author :
Callahan, M. ; Johnson, Chris
Author_Institution :
Mostek Corp., Carrollton, TX, USA
Keywords :
CMOS technology; Circuits; Filtering; Frequency; Keyboards; Large scale integration; Operational amplifiers; Power harmonic filters; Shape; Telephony;
Conference_Titel :
Solid-State Circuits Conference. Digest of Technical Papers. 1977 IEEE International
Conference_Location :
Philadelphia, PA, USA
DOI :
10.1109/ISSCC.1977.1155665
