Title :
1/f noise in ceramic superconductors and granular resistors
Author :
Takagi, K. ; Mizunami, T. ; Okayama, H. ; Yang, S.
Author_Institution :
Dept. of Electr. Eng., Kyushu Inst. of Technol., Kitakyushu, Japan
Abstract :
The authors have measured the current noise in some components with granular structure. The samples are ceramic superconductors, carbon-black graft-polymer resistors, and positive-temperature-coefficient ceramics. All noise spectra are of the 1/f type, and the noise level is proportional to the square of the current. The granular resistors consist of many discrete grains, and their boundaries are in contact with each other. Thus, the noise in the granular resistors would arise from the same type of mechanism as in static contacts. The temperature dependence of the noise level was measured and compared with that of the resistance. It is shown that the temperature coefficient of the resistance is related to the noise level in these components as predicted by the authors´ temperature fluctuating model
Keywords :
ceramics; electron device noise; high-temperature superconductors; random noise; resistors; 1/f noise; carbon-black graft-polymer resistors; ceramic superconductors; current noise; granular resistors; granular structure; high temperature superconductors; noise spectra; positive-temperature-coefficient ceramics; temperature coefficient; temperature dependence; temperature fluctuating model; Ceramics; Current measurement; Electrical resistance measurement; Granular superconductors; Noise level; Noise measurement; Predictive models; Resistors; Superconducting device noise; Temperature dependence;
Conference_Titel :
Electronic Manufacturing Technology Symposium, 1989, Proceedings. Japan IEMT Symposium, Sixth IEEE/CHMT International
Conference_Location :
Nara
DOI :
10.1109/IEMTS.1989.76165
