ON THE MEASUREMENT OF SMALL DEVIATIONS FROM THE OHMIC LAW.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1967
- Accession Number
- AD0662625
Entities
People
- Gianluigi Busca
- Guido Bonfiglioli
- Piero Brovetto