电信专业英语教学课件 LESSON 1 VLSI TECHNOLOGY.ppt

《电子信息工程专业英语教程》 Unit 1 Electronic Devices Lesson 1 VLSI Technology Lesson 1 VLSI Technology Terminology Transistor vs. vacuum tube Conductivity semiconductor Miniaturization , IC, LSI, VLSI Timeline of Electronic Technology Evolution Company Information Bell Laboratories Texas Instruments Intel Corporation Terminology 真空管是一种内部气体全部或部分抽空的电子管，从而使电子在不受或少受气体分子的干扰下运动。 A transistor is a device that conducts a variable amount of electricity through it, depending on how much electricity is input to it. In other words, it is a digital switch. However, unlike the vacuum tube , it is solid state . Solid state means that it doesnt change its physical form as it switches. There are no moving parts in a transistor. Compared to the vacuum tube , transistors were much smaller, faster, and cheaper to manufacture. They were also far more reliable and used much less power. While most materials either insulate from electrical flow (air, glass, wood) or conduct electricity readily (metals, water), there are some that only conduct electricity a small amount, or only under certain conditions. These are called semiconductors. The most commonly used semiconductor is of course silicon. Miniaturization means the reduction in size of components and circuits for increasing package density and reducing power dissipation and signal propagation delays. The integrated circuit is a group of transistors manufactured from a single piece of material and connected together internally, without extra wiring . Integrated circuits are also called ICs or chips. LSI：Large-scale Integration大规模集成(电路) Large-scale integration (LSI) came to refer to the creation of integrated circuits that had previously been made from multiple discrete components. 大规模集成是指将先前多个分立部件构成的电集成化。 VLSI：Very Large-scale Integration 超大规模集成(电路) VLSI circuits can contain millions of transistors. Timeline of Electronic Technology Evolution 1900s: The Vacuum Tube. 1905: First electronic diode vacuum tube is built