AN INSTANTANEOUSLY-RESPONDING EXPANSION AMPLIFIER: A METHOD AND DEVICE FOR SIGNAL ENHANCEMENT IN NOISY COMMUNICATION SYSTEMS

Abstract

A variable-gain amplifier having instantaneous responsetime has been designed, constructed and tested, to enable recovery of a usable audiofrequency signal from noisy analog and digital systems. For 1-dB increments in signal level at or above -40 dBm, this device will provide increments on the order of 5 dB, over the frequency-range 50 to 10,000 cps. The rise and decay envelope is apparently symmetrical, with slopes approximating one millisecond. This report discusses design features, including a modification for analog speech signals, and gives detailed results of laboratory and field tests.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1964
Accession Number
AD0604527

Entities

People

  • Laurence E. Orne
  • Stephen E. Stuntz

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Amplifiers
  • Audio Frequency
  • Background Noise
  • Cathode Followers
  • Circuits
  • Communication Systems
  • Digital Data
  • Dynamic Response
  • Electron Tubes
  • Electronic Switches
  • Frequency
  • Frequency Response
  • Generators
  • Noise Generators
  • Radio Equipment
  • Signal Generators

Fields of Study

  • Engineering

Readers

  • Approximation Theory.
  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Electronics Engineering