Unit 3 Electronic System ComponentsLesson 9 Interconnects电子信息工程专业英语教程任治刚 主编 电子工业出版社 www.phei.com.cnDate1电子信息工程专业英语教程Lesson 9 Interconnects Backgrounds Text tour Language in use Vocabulary Structure Reading/writing techniquesDate2电子信息工程专业英语教程 Terminology VSWR frequency response decibel pad, lead ribbon cable BNCBackgroundsDate3电子信息工程专业英语教程Terminology Date4电子信息工程专业英语教程VSWR Voltage Standing Wave Ratio 电压驻波比Date5电子信息工程专业英语教程Frequency response 频率响应Date6电子信息工程专业英语教程Decibel (dB) decibel 分贝 A unit used to express relative difference in power or intensity, usually between two acoustic or electric signals, equal to ten times the common logarithm of the ratio of the two levels.Date7电子信息工程专业英语教程Pad , lead Pad 焊点，焊盘 Lead 引线Date8电子信息工程专业英语教程ribbon cable 带状电缆 扁平柔性电缆Date9电子信息工程专业英语教程 同轴电缆卡环形接头BNC Date10电子信息工程专业英语教程Text tour Outline Introduction High-Speed Connector Problems Crosstalk Levels of InterconnectsDate11电子信息工程专业英语教程 Interconnect devices are used for interconnecting Performance requirements Tests that indicate signal integrity include Introduction Date12电子信息工程专业英语教程 Interconnect effects can play a significant part in the timing and noise characteristics of a circuitHigh-Speed Connector ProblemsDate13电子信息工程专业英语教程 caused by inductive and capacitive coupling between contacts and/or lines feeding contacts. can be expressed in a percentage of the voltage swing of the signal, or in decibels (dB), Two types of crosstalk : backward crosstalk forward crosstalk Crosstalk can also be single-line or multiline. To completely understand the crosstalk specifications of a connector, a user needs the following information:CrosstalkDate14电子信息工程专业英语教程 Level 1: chip pad to package leads, e.g., wire bonds Level 2: components to circuit board, e.g., PLCC socket Level 3: circuit board (board-to-board) connector, e.g., edge-card for motherboard to daughter board connection Level 4: subassembly interconnects, e.g., ribbon cables Level 5: subassembly to I/O, e.g., BNC connector Level 6: system interconnects, e.g., Ethernet connectorsLevels of InterconnectsDate15电子信息工程专业英语教程 Vocabulary loss, shield, detrimental, degradation, ratio Structure Reading/writing techniquesLanguage in useDate16电子信息工程专业英语教程VocabularyDate17电子信息工程专业英语教程Loss in dictionary The act or an instance of losing: 失败 One that is lost: 损失 The power decrease caused by resistance in a circuit, circuit element, or device. 功率损耗 The amount of a claim on an insurer by an insured. 险损赔偿额Date18电子信息工程专业英语教程Loss in text Interconnect devices must meet certain performance requirements in most or all of the following categories: Signal integrity Power loss 互连器件必须满足下列大多数或者全部性能要求： 信号完整性 功率损耗 Date19电子信息工程专业英语教程Loss in use absorption loss 吸收损耗 antenna loss 天线损耗 aperture loss 孔径失真 conduction loss 传导损耗 contact loss 接触损耗 conversion loss 变换损耗 coupling loss 耦合损耗 crosstalk loss 串话损耗Date20电子信息工程专业英语教程Loss in use distribution loss 配电损耗 gross loss 毛损, 总损 harmonic loss 谐波损耗 insertion loss 插损 iron core loss 铁芯损耗 load loss 负载损耗 power mismatch loss 输入失配损耗 propagation (power) loss 传播(功率)损耗 transmission loss 传输损耗Date21电子信息工程专业英语教程Shield in dictionary A broad piece of armor made of rigid material and strapped to the arm or carried in the hand for protection against hurled or thrusted weapons. 盾 A person or thing that provides protection. 后盾 A protective device or structure 防护性装置或结构 A technical safeguard that protects the circuit or unit from the influence of external electric or magnetic sources to produce harmful signal. 屏蔽Date22电子信息工程专业英语教程Shield in text Electrical characteristics: contact resistance, inductance and capacitance; voltage and power ratings; shielding; filtering 电气特性（接触电阻，电感和电容，电压和功 率额定值，屏蔽，滤波） Date23电子信息工程专业英语教程Shield in use arc shield 电弧罩 baffle shield 隔音板 cable shield 电缆套管 electrostatic shield 静电屏蔽 ground shield 接地屏蔽 radiation shield 防辐射屏蔽Date24电子信息工程专业英语教程Detrimental in dictionary Causing damage or harm; injurious.引起损害的；有害的Date25电子信息工程专业英语教程Detrimental in text An interconnect that must pass the short rise time of a high-speed signal pulse can be detrimental to maintaining signal integrity due to an unwanted reflection. 因为出现了反射，所以在通过互连路径传送高 速信号脉冲时，短促的上升时间就会破坏信号 的完整性。 Date26电子信息工程专业英语教程Degradation in dictionary The act or process of degrading. 降级 The state of being degraded; degeneration. 堕落，衰退 A decline to a lower condition, quality, or level. 退化，下降 Decomposition of a compound by stages, exhibiting well- defined intermediate products. 降解Date27电子信息工程专业英语教程Degradation in dictionary In data communications, a deterioration in the characteristics of a signal for whatever reason. A condition in which the system operates at reduced level