Higher Physics

Particles and Waves - Activity 14

Switching action of an n-channel enhancement MOSFET

Aim - To investigate the relationship between the input p.d. and the output p.d. for a MOSFET, and to determine the switching p.d.     Instructions 
The input p.d. (VGS) can be increased by clicking on the right side of the potentiometer. It can be decreased by clicking on the left side of the potentiometer.
The lower voltmeter measures (VGS) and the upper voltmeter measures (VB).
  • Increase VGS in 0.2 V steps and record the values of VGS and VB.
  • Draw a graph to show the relationship between VB and VGS
  • Determine the switching p.d. for this MOSFET.
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