Computer tuning of hybrid audio oscillators
- 1 February 1969
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Spectrum
- Vol. 6 (2) , 56-60
- https://doi.org/10.1109/MSPEC.1969.5213964
Abstract
A hybrid tantalum thin-film and beam-lead silicon device will be incorporated in the Bell System's Touch-Tone telephones of the future. This RC multifrequency audio oscillator will replace the LC device presently used in the Touch-Tone keyboards. The tuning process for the RC device requires that the tantalum thin-film resistors be custom adjusted to calculated values; and a tuning system driven by a small process-control computer has been designed to fulfill this function.Keywords
This publication has 1 reference indexed in Scilit:
- An Integrated RC Oscillator for TOUCH-TONE® DialingIEEE Transactions on Communications, 1968