Diodes and Bipolar Junctions

Diodes and transistors are critical components in analog electronics.   Specialty diodes are designed to perform very specific functions and can  be used to allow many useful electronic devices to perform the  functions they are designed.  While the Bipolar junction is usually  associated with amplifiers, it can also be applied to other  applications.

 

 

Answer the following:

  1. Report on ONE of the following topics and try to explain it to the rest of the class.
    • Explain the use of a diode for
      • Laser
      • Regulation
      • Light emission
  2. Report on ONE of the following topics and try to explain it to the rest of the class.
    • Explain the use of a Bipolar Junction Transistor for:
      • Voltage amplifier
      • Phototransistor

Explain the use of a diode for  Laser

Introduction

A diode is a semiconductor with two conducting regions, one named as anode and other named as cathode. They are generally used in laser to regulate the brightness. A diode is used in laser as a switch that is being ON and OFF. When the voltage across the diode increases, it will allow more current to flow to the laser diode; which will result in higher intensity of beam. When it reaches a certain point, it will reverse the polarity and reduce the current flowing through it and therefore reducing the intensity of beam.

Diode is used in laser to regulate the brightness. A diode is used in laser as a switch that is being ON and OFF. When the voltage across the diode increases, it will allow more current to flow to the laser diode; which will result in higher intensity of beam. When it reaches a certain point, it will reverse the polarity and reduce the current flowing through it and therefore reducing the intensity of beam.

Conclusion

A diode is used in laser to regulate the brightness. A diode is used in laser as a switch that is being ON and OFF. When the voltage across the diode increases, it will allow more current to flow to the laser diode; which will result in higher intensity of beam. When it reaches a certain point, it will reverse the polarity and reduce the current flowing through it and therefore reducing the intensity of beam.

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