Active Filters Applied to Helicopter Noise Reduction.

Abstract

Two active filter resonators of the negative feed-back type are evaluated. Claimed stability in literature and design formulas are verified by an active filter breadboard. Requirements for a passive L-C filter, developed for avionics equipment, were used as design objectives. The desired response was realized using two resonator types. A hybrid version of the active filter was designed and fabricated to establish that microminiaturization was feasible without any degradation in performance. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1971
Accession Number
AD0734812

Entities

People

  • Richard S. Tilton

Organizations

  • United States Army Communications-Electronics Command

Tags

DTIC Thesaurus Topics

  • Aircraft Equipment
  • Avionics
  • Degradation
  • Electrical Equipment
  • Electronic Equipment
  • Helicopters
  • Literature
  • Microminiaturization
  • Miniature Electrical Equipment
  • Miniature Electronic Equipment
  • Noise
  • Noise Reduction
  • Resonators
  • Vehicle Equipment
  • Vehicles

Fields of Study

  • Engineering

Readers

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