ELECTRICAL NOISE IN SEMICONDUCTORS 



!).")'.) 



-200 -180 -160 -140 -120 -100 -60 -60 -40 -20 20 40 



TEMPERATURE IN DEGREES CENTIGRADE 



Fig. 7 — \'ariati()ii of noise with temperature in .single crystal filanuuits. 



independent of the resistivity of the material. From the data it also 

 appears that there is no consistent difference between n- and p-type 

 material. 



Noise does not appear to depend on orientation of the filament with 

 respect to the crystal axes. Filaments orientated along the 100, 110, and 

 1 1 1 directions and I'otated in several wavs about these directions showed 



0.1 



0.2 



40 60 100 



0.4 0.6 1.0 2 4 6 8 10 20 



RESISTIVITY IN OHM-CENTIMETERS 



Fig. 8 — Variation of noise with resi.stivit_y in single crystal filaments. 



