Title :
A Servo System for Heterodyne Oscillators
Author_Institution :
Bell Telephone Laboratories, Inc., Murray Hill, N. J.
fDate :
7/1/1951 12:00:00 AM
Abstract :
A constant rate of progression of frequency of a motor-driven heterodyne oscillator is obtained by comparing its output with a frequency standard. The result is fed into a servo loop which drives the motor at the proper speed. When used in connection with a level recorder a linear frequency scale is obtained which is more accurate than the static calibration of the oscillator.
Keywords :
Calibration; Frequency measurement; Integrated circuit measurements; Oscillators; Power measurement; Pulse measurements; Servomechanisms; Synchronous motors; Teeth; Time measurement;
Journal_Title :
American Institute of Electrical Engineers, Transactions of the
DOI :
10.1109/T-AIEE.1951.5060526
