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Output Characteristics of n - Channel MOSFET

Output Characteristics of n - Channel MOSFET

Objectives

  • To plot the output characteristics of n- channel MOSFET.
  • To compute the drain resistance

Experiment

  • Output characteristics indicate the variation of the drain current ($I_{D}$) with the drain to source voltage ($V_{DS}$) for different gate to source voltages ($V_{GS}$).
  • Wire up the ciruit in QUCS schematic editor as shown below.
  • Run the simulations and observe the output characteristics as shown below.
  • Select a characteristics and draw a tangent in the saturation region and compute the drain resistance as \begin{equation} r_{d}=\frac{\Delta V_{DS}}{\Delta I_{D}} \end{equation} for the given $V_{GS}$

    • Observations

    Drain resistance = $\ldots\ldots\ldots\ldots\ldots\ldots\ldots\ldots\,\Omega$

    What You Learned

  • You understood the output characteristics of $n-$ channel MOSFET.

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