Gummel plot: Difference between revisions

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[[File:SiGe HBT Gummel Plot.png|thumb|SiGe HBT Gummel plot]]

In [[electronics]], the '''Gummel plot''' is the combined [[plot]] of the base and collector [[electric current]]s, <math>I_cI_\text{c}</math> and <math>I_bI_\text{b}</math>, of a [[Bipolar junction transistor|bipolar transistor]] vs. the base-emitterbase–emitter [[voltage]], <math>V_\text{be}</math>, on a semi-[[logarithmic scale]]. This plot is very useful in device characterization because it reflects on the quality of the emitter-baseemitter–base [[Junction (semiconductor)|junction]] while the base-collectorbase–collector bias, <math>V_\text{bc}</math>, is kept at a [[constant]].Constant A number of other device parameters can be garnered either [[quantitative(mathematics)|quantitativelyconstant]] or [[qualitative|qualitatively]] directly from the Gummel plot: the d.c. gain, b; base and collector ideality factors, nIb and nIc; series [[resistance]]s and [[leakage current]]s.

A number of other device parameters can be garnered either [[Quantitative property|quantitatively]] or [[qualitative data|qualitatively]] directly from the Gummel plot:<ref>A. S. Zoolfakar et N. A. Shahrol, «Modelling of NPN Bipolar Junction Transistor Characteristics Using Gummel Plot Technique», in 2010 International Conference on Intelligent Systems, Modelling and Simulation (ISMS), 2010, p. 396–400.</ref>

See also: [[Hermann Gummel]]

* The [[common-emitter]] current gain, <math>\beta</math>, and the [[common-base]] current gain, <math>\alpha</math>,

* {{anchor|Base ideality factor|Collector ideality factor}}Base and collector [[ideality factor]]s, <math>n</math>,

* Series [[electrical resistance|resistance]]s and [[leakage current]]s.

Sometimes the DC current gain, <math>\beta</math>, is plotted on the same figure as well.

==See also==

{{electro-stub}}

See also:* [[Hermann Gummel]]

* [[Bipolar junction transistor]]

* [[Gummel–Poon model]]

==References==

<references />

{{DEFAULTSORT:Gummel Plot}}

[[Category:Transistors]]

[[Category:Plots (graphics)]]

{{electroElectronics-stub}}