DESIGN OF A DIGITAL CONTROL UNIT FOR AN NRL RECEIVING SYSTEM.

Abstract

To provide required receiver tuning accuracy a digital control unit for the receiver local oscillator was designed and constructed. The approach used a voltage-controlled oscillator in a closed-loop feedback system. The requirements were to control the receiver local oscillator from 175 MHz to 180 MHz in 1-kHz increments with provisions for both manual or computer control of the receiver. The digital control unit was breadboarded, using integrated circuits as the building blocks. The basic principle used to establish control of the local oscillator was the comparison of phase between a standard reference signal and a function of the local oscillator frequency. The error voltage established from this comparison was then used to control the local oscillator. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1969
Accession Number
AD0692380

Entities

People

  • Joseph M. Abell

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Circuits
  • Closed Loop Systems
  • Computers
  • Electronic Equipment
  • Errors
  • Feedback
  • Frequency
  • Frequency Bands
  • Integrated Circuits
  • Local Oscillators
  • Oscillators
  • Standards
  • Voltage Controlled Oscillators

Readers

  • Integrated Circuit Design and Technology.
  • Radio communications and signal processing.
  • Robotics and Automation.