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Electronic Devices and Circuits, Second Edition by Battula Tirumala Krishna, Dharma Raj Cheruku

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Chapter 9

Thyristors

Structure and circuit symbol of a SCR

Chapter Outline

The concepts introduced in this chapter are:

  • Shockley diode
  • Silicon-controlled rectifier
  • TRIAC and DIAC
  • Unijunction transistor
  • Optoelectric devices and few examples of such devicesphotodiodes, phototransistors, LEDs and LASCR
9.1 INTRODUCTION

The electronic devices such as p-n junction semiconductor diode, bipolar junction transistor or field-effect transistor are the devices that can handle very low powers and are not suitable to be operated at high powers of the order of kilowatts or above. To control these high powers, special electronic devices are required. ...

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