Title :
A hardware multitone digital frequency synthesizer
Author :
Wittman, B.A. ; Early, S.H. ; Messerschmitt, D.G.
Author_Institution :
Bell Laboratories, Indianapolis, IN
fDate :
12/1/1979 12:00:00 AM
Abstract :
The synthesis of two or more tones simultaneously has numerous applications, including telephone signaling, music synthesis, waveform generation, and man-machine communications. We describe a hardware approach in which the basic tones are generated digitally for accuracy and stability, using time-shared circuitry. The tones are combined and their levels are controlled by an analog approach using a pair of D/A converters, avoiding digital multipliers and adders. Performance and description of a hardware prototype are given.
Keywords :
Circuit stability; Circuit synthesis; Communication system control; Frequency synthesizers; Hardware; Man machine systems; Multiple signal classification; Signal generators; Signal synthesis; Telephony;
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
DOI :
10.1109/TASSP.1979.1163306
