专业英语Lesson 12 Electronics.pptVIP

《电子信息工程专业英语教程》 Lesson 12 Electronics ? Backgrounds ? Text tour ? Language in use – Vocabulary – Structure – Reading/writing techniques Backgrounds ? Terminology – vacuum tubes 真空管 – transistors 晶体管 – Integrated Circuits 集成电路 – resistors 电阻 – capacitors 电容 – inductors 电感 – sensing devices 传感器 – transducers 变送器 – passive component 无源元件 – active element 有源元件 Text tour ? Outline 12.1 Introduction 12.2 Historical Background of Electronics 12.3 Electronic Components 12.1 Introduction ? Electronics is a field of engineering and applied dealing with the design and application of devices. usually electronic circuits, the operation of which depends on the flow of electrons for the generation, transmission, reception, and storage of information 12.2 Historical Background of Electronics ? The introduction of vacuum tubes at the beginning of the 20th century was the starting point of the rapid growth of modern electronics ? The transistor, invented in 1948, has now almost completely replaced the vacuum tube in most of its applications ? Subsequent advances in semiconductor technology led to the development of the integrated circuit 12.3 Electronic Components ? Components are classified into two categories – Passive elements – active elements ? electronic components introduction – Vacuum Tubes – Transistors – Integrated Circuits – Resistors – Capacitors – Inductors – Sensing Devices and Transducers 12.4 Electronic Components – Vacuum Tubes ? A vacuum tube consists of an air-evacuated glass envelope that contains several metal electrodes ? the principle and function of Vacuum Tubes 12.4 Electronic Components – Transistors ? Transistors are made from semiconductors. These