Abstract
Noise measurements at moderate frequencies on several types of planar bipolar transistors are presented. The results show that the representation of the base region by a single resistance in the equivalent circuit is incompatible with the measured values of thermal noise and base-current noise. A theoretical analysis of thermal and current-induced noise is given for various geometries of base region, and provides a partial explanation of the observed effects.
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More From: Proceedings of the Institution of Electrical Engineers
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