专业英语李白萍版(wust期末考)第4章汇编.ppt

Unit 4 Microelectronics Unit 4 Microelectronics Passage A Introduction to Microelectronics Passage B The Simple Atom, Conductors, Insulators and Semiconductors Passage A Introduction to Microelectronics 　　The exploring of space and the development of earth satellites has increased the importance of reducing the size and weight of electronic circuits. …. has increased …. The exploring of space and the development of earth satellites reducing the size and weight of electronic circuits. Also, even though electricity flows quite rapidly in computers, the time delay of the signal in the interconnections between electronic components is an important consideration. 加个逗号，有助理解 ….., an operational amplifier for example,…. = for example an operational amplifier Maintenance is simplified because if a component of the IC fails the complete IC is usually replaced. mono:单一的 e.g. monocular semi:半 e.g. semiautomatic insulating: 绝缘的 ceramic:陶瓷 substrate：基质 Field effect transistors (FET) have a advantages over bipolar transistors in many cases however. = however Field effect transistors (FET) have a advantages over bipolar transistors in many cases The problem of extracting the heat generated in the circuit may then be a difficult one.[2] The form of construction of the FET, and particularly the MOSFET, also lends itself well to integrated circuit fabrication, and enables resistors and capacitors to be included readily in the integrated circuit. …capacitance values must not be too large… Otherwise they must be included as an external lumped element. Passage B The Simple Atom, Conductors, Insulators and Semiconductors The materials that make up our universe are composed of over one hundred basic and individual types of matter called elements. Ninety-two of these elements occur naturally …. that is……. , nor can an element…. particle: n. 颗粒；[物] 质点；极小量；小品词 In any one element the atoms are identical in structure. The