Title :
An Integrated RC Oscillator for TOUCH-TONE® Dialing
Author :
Orr, W. ; Rickert, R. ; Hill, D.
Author_Institution :
Bell Labs., Allentown, PA
fDate :
8/1/1968 12:00:00 AM
Abstract :
A multiple frequency RC oscillator for use in TOUCHTONE® telephones has been made using tantalum films and beam lead silicon devices. The integrated design, equivalent to over 50 discrete components, requires a volume of about four hundredths of a cubic inch. All eight frequencies of the tone generator are initially tuned to 0.1 percent.
Keywords :
Circuits; Delay effects; Design engineering; Detectors; Frequency; Measurement techniques; Oscillators; Semiconductor films; Silicon; Telephony;
Journal_Title :
Communication Technology, IEEE Transactions on
DOI :
10.1109/TCOM.1968.1089878
