Accession Number:

AD0662625

Title:

ON THE MEASUREMENT OF SMALL DEVIATIONS FROM THE OHMIC LAW.

Descriptive Note:

Part B of Final scientific rept.,

Corporate Author:

NATIONAL ELECTROTECHNICAL INST TURIN (ITALY)

Report Date:

1967-05-01

Pagination or Media Count:

22.0

Abstract:

The present note describes a setup for recording the second derivative of the current vs. voltage characteristic of a passive electric bipole. From such a record small deviations from linearity i.e. Ohmic conduction can be measured with very high sensitivity. The second derivative is obtained by measuring, with a lock-in amplifier, the second harmonic content of the current through the bipole, when the latter is subjected to a sinusoidal voltage, accurately harmonic-free. The principle of the method is developed and the performance of the setup is demonstrated in a typical case. Author

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE