AFC FOR DISCRETE FREQUENCIES

Abstract

An AFC (automatic frequency control) was developed for stabilizing the frequency of a voltagetunable oscillator near any one of many discrete frequencies. A delay line takes the place of the conventional cavity in the discriminator. The discrete steps correspond to the electrical length of the delay line, e. g. 2 mcs at S-band in the system. Slow frequency fluctuations inherent in the oscillator are reduced; a stabilization factor of 100 was achieved in a system for jumping frequency rapidly by stepping the tuning voltage. The nature of the hysteresis loops and means for their reduction are discussed. The subject is significant for improving the stability and the spectrum of wide-band tunable oscillators. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 19, 1961
Accession Number
AD0259479

Entities

People

  • Thomas J. Rey

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Automatic
  • Automatic Frequency Control
  • Delay Lines
  • Discriminators
  • Frequency
  • Hysteresis
  • Oscillators
  • Spectra

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Electrical Engineering
  • Electronics Engineering