Gummel plot
In electronics, the Gummel plot is the combined plot of the base and collector electric currents, and, of a bipolar transistor vs. the base–emitter voltage,, 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,, 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,, is plotted on the same figure as well.
