UNTRANSLATED .. 3.12

Transistor Output characteristics (CE)

Objective

Plot the output characteristic curve of a transistor. Collector is connected to PV1 through a 1K resistor.

_images/transistor_out.svg _images/transistor-ce.png

Procedure

  • Set base voltage to the 1 volt and START.
  • Repeat for different base currents.

Discussion

The characteristic curves for different base currents are shown in figure. The collector current is obtained from the voltage difference across the 1~k\Omega resistor.

The base current is set by setting the voltage at one end of the 100~k\Omega resistor, the other end is connected to the transistor base. The value of base current is calculated by, I_b = (U_{PV2} − U_{A2})/(100 \times 10^3) \times 10^6~\mu A. If A2 is not connected, the code assumes 0.6 volts at the base to calculate the base current.