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Gummel plot
Transistor plot

In electronics, the Gummel plot is the combined plot of the base and collector electric currents, I c {\displaystyle I_{\text{c}}} and I b {\displaystyle I_{\text{b}}} , of a bipolar transistor vs. the base–emitter voltage, V be {\displaystyle V_{\text{be}}} , on a semi-logarithmic scale. This plot is very useful in device characterization because it reflects on the quality of the emitter–base junction while the base–collector bias, V bc {\displaystyle V_{\text{bc}}} , is kept constant.

A number of other device parameters can be garnered either quantitatively or qualitatively directly from the Gummel plot:

Sometimes the DC current gain, β {\displaystyle \beta } , is plotted on the same figure as well.

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See also

References

  1. 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.