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Electrical Characteristics of Power Transistors

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1 Author(s)
Nussbaum, Allen ; Honeywell Research Center, Hopkins, Minn.

The following electrical characteristics of a group of power transistors whose collector dissipation is in the region of 20 watts have been measured: the small-signal current amplification as a function of emitter current, the cutoff frequency as a function of emitter current and collector voltage, and the decrease of current amplification with increasing frequency. All these measurements were made in both common-base and common-emitter configuration. The results were compared with the theory developed for low-power transistors by Shockley, Rittner, Webster, and others, and it was found that for the frequency-dependent parameters, the agreement was quite good, but that differences exist in the case of those which are a function of current. This leads to the conclusion that further work must be done on the theory of junction power transistors.

Published in:

Proceedings of the IRE  (Volume:43 ,  Issue: 3 )