Vacuum Tube Current Amplifier for Inter-Departmental Distribution

Abstract

A simple, stable, portable, current amplifier is described which is capable of amplifying d. c. currents of .5 microampere or larger to a value sufficient to ac uate a recorder requiring 500 microamperes. Circuit, theory, and uses are described. A triode vacuum tube is used as a degenerative current amplifier. The linearity and zero stability are excellent. The output is sufficient to operate a rugged meter or recorder. The maxium current amplification is 1000, permitting a full scale reacting with .5 microampere input. Uses as a d.c. or a.c. voltmeter, ohmmeter, photocell and galvanometer amplifier, and as an electrometer are also suggested.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 10, 1942
Accession Number
AD1166786

Entities

People

  • Raymond C. Waddel

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Accuracy
  • Amplifiers
  • Cells
  • Circuits
  • Current Amplifiers
  • Dry Batteries
  • Electron Tubes
  • Galvanometers
  • Light Sources
  • Measurement
  • Measuring Instruments
  • Military Research
  • Ohmmeters
  • Push Buttons
  • Radio Frequency
  • Recording Systems
  • Resistance
  • Resistors
  • Voltmeters

Fields of Study

  • Physics

Readers

  • Electrical Engineering