Title :
Computer tuning of hybrid audio oscillators
Author :
Hintzman, Frederick H., Jr.
Author_Institution :
Western Electric Company
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 :
Circuit optimization; Computer aided manufacturing; Frequency; Oscillators; Resistors; Substrates; Telephony; Thin film circuits; Thin film devices; Tuning;
Journal_Title :
Spectrum, IEEE
DOI :
10.1109/MSPEC.1969.5213964
