电子信息工程专业英语课件4.ppt

《电子信息工程专业英语教程》 Unit 3 Electronic System Components Lesson 7 Switching Power Supply Lesson 7 Switching Power Supply Terminology Domino effect Terminology 骨牌效应 A cumulative effect produced when one event sets off a chain of similar events: 由一件事引发一系列相似事件的累积效应： the domino effect of increasing the speed limit in one of several contiguous states. 几个毗邻州中的一个州提高汽车速度极限而引起的骨牌效应 The linear regulator It operates by… only 30 to 50 percent efficient uneconomical above 10 watts for small applications Switching regulator operates the power devices in the full-on and cutoff states efficiencies of between 70 to 90 percent an attractive choice for output powers greater than 10 watts or where multiple outputs are desired A topology is … Each topology has its own merits within certain applications. Some of the factors which determine the suitability of a particular topology to a certain application … Vocabulary load , cutoff, flux, barrier, effect, condition Structure Reading/writing techniques A weight or mass that is supported: 负重 The overall force to which a structure is subjected in supporting a weight or mass or in resisting externally applied forces. 负载量 Something that is carried, as by a vehicle, a person, or an animal: 装载物 The quantity that is or can be carried at one time. 装载量 The share of work allocated to or required of a person, a machine, a group, or an organization. 工作负荷量 The demand for services or performance made on a machine or system. 负荷 The amount of material that can be inserted into a device or machine at one time: 装填量 A mental weight or burden: 精神负担 A responsibility regarded as oppressive. 负担 The power output of a generator or power plant. 发电量 Historically, the linear regulator was the primary method of creating a regulated output voltage. It operates by reducing a higher input voltage down to the lower output voltage by linearly controlling the conductivity of a series pass power device in response to changes in its load. This result