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Field-effect transistors preferred over bipolar junction

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Reference no: EM131076953

JFETs

INTRODUCTION

Which types of applications are field-effect transistors preferred over bipolar junction transistors? Why? Explain why junction field-effect transistors are considered voltage-controlled devices.

EQUIPMENT

  • 1 power supply: 15V
  • 1 transistor: 2N4860
  • 3 resistors: 1k?, 4.7k?, 2M?
  • <List meters used>

PROCEDURE

Using Multisim construct the circuits shown below:

Measure the following and record the values in the "results" section: VG, ID, VS, VD, VDS,

2325_ku.jpg

RESULTS

Calculate VGS from the measured values.

Which type of biasing is used?

The table below shows readings for three different cases where the circuit above, was malfunctioning. Find the fault, assuming only one device in each case has a problem. List the steps taken to arrive at a solution.

 

VDS

VD

VS

What is the problem?

1

91.4mV

91.4mV

0V

 

2

66.5mV

15V

14.9V

 

3

15

15

0

 

CONCLUSION

What did you learn?

Reference no: EM131076953

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