LOW-LEVEL, LOW-FREQUENCY PHOTOCELL AMPLIFIER,

Abstract

This report describes development of a low-level, low-frequency photocell amplifier (PCA) having either analog, broad-band FM carrier, or IRIG FM carrier output. A galvanometer with a high natural frequency is used in the input circuit for increased ruggedness. Signal frequencies up to 100 cps may be amplified. The amplifier is capable of detecting a signal of 1.25 x 10 to the minus 18 w in the bandpass from 0.01 to 5 cps. Power requirements is less than 1.7 w. Signal common-mode rejection is greater than 140 db, and the noise introduced by power-supply variations is negligible. The voltage gain of the PCA with analog output is 350K. The PCA using broad-band FM output in combination with the FM discriminator provides the unique combination of high voltage gain (1 x 10 to the 6) and high dynamic range (69 db). Floating input, output, and power-supply connections are features of the amplifier. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 28, 1964
Accession Number
AD0446573

Entities

People

  • James E. Keele

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplifiers
  • Discriminators
  • Dynamic Range
  • Frequency
  • Galvanometers
  • High Dynamic Range
  • High Voltage
  • Photoelectric Cells (Semiconductor)
  • Power Supplies
  • Rejection
  • Resonant Frequency
  • Seismographs
  • Voltage

Readers

  • Electronics Engineering