共查询到20条相似文献,搜索用时 46 毫秒
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在对原设计方案进行大量反设计的基础上,以电路的集成化、数字化为设计思想,拟定了总体设计方案,完成了具体电路的设计。电路调试结果表明:系统功能完备,各项性能指标均达到并超过进口设备要求。该设计可为使用单位改装提供参考依据。 相似文献
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<正> NCP348是安森美公司的产品,是一种具有过压锁存及欠压锁存保护功能的器件。该保护器的主要特点:过压保护的电压可达28V;内部有65mΩ的低导通电阻的 N 沟道功率 MOSFET;内部有升压式电荷泵电路以保证 N 沟道的 V_(GS);过压及欠压阈值由器件内部设定,外部无需设定过压及欠压值的电阻:当有过压或欠压时,器件输出告警信号;有关闭器件控制的端;防静电击穿电压为 相似文献
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<正> 固体放电管(或称半导体放电管)是基于晶闸管、TVS二极管原理和结构的一种两端负阻器件,其电性能、可靠性均优于气体放电管。它广泛用于通讯设备中的程控交换机、电话机、传真机、配线架,也可用于调制解调器、网络、计算机、电视机、有线电视系统等需要防雷保护的领域。 工作原理 固体放电管的结构图如图1所示。它是在硅单晶片两面同时采用平面工艺掺杂同种杂质而形成的两面结构完全相同的 相似文献
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Anthony H Smith 《电子设计技术》2007,14(9):104-104,106
图1中的断路器仅需几个廉价的元件,即可对过电流和过电压故障状态进行反应.电路的核心是可调节的精密分路电压调节器D2,置在一只3引脚的封装中,提供了电压参考、比较器和集电极开路输出. 相似文献
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由于传统数据采集电路的可靠性和实时性较低,且占用过多处理器资源,文章设计一种基于FPGA的具有过压保护功能的数据采集电路设计方案。一方面使得数据采集电路更加适用于复杂的高集成化系统中,并提高了采集的实时性和可靠性;在另一方面,为防止外部某一路的输入电压过高造成转换芯片AD7656失效,设计出相应的过压保护电路,有效防止外部过大电压对芯片的损伤,提高系统的稳定性。最终通过仿真对结果进行验证。通过本设计可以为高集成化的数据采集系统提供一种稳定性高、转换速度快的实施方案。 相似文献
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本文就±1100kV特高压直流换流站过电压保护和绝缘配合进行了具体研究,希望这一研究能够在一定程度上推动我国电力事业的相关发展. 相似文献
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Design protection for WDM optical networks 总被引:9,自引:0,他引:9
With wavelength division multiplexing (WDM) networks the failure of a single link or component may cause the simultaneous failure of several optical channels, potentially making impossible restoration by rerouting directly in higher layers directly using the optical network (SDH, ATM, internal protocol (IP)). To address this, we introduce the concept of design protection, which aims at making such failure propagations impossible. We present the disjoint alternate path (DAP) algorithm which places optical channels in order to maximize design protection. We show the result on various network examples 相似文献
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For ESD protections of RF Power MOSTs, Vt1 lowering by the RF signal - due to the dV/dt effect - can seriously degrade the RF performance. The use of a cascoded protection solves this problem. A new failure mechanism, related to the discharge of on-chip RF matching capacitors is presented. Adding a current limiting resistor in the protection solves this issue. Combining these solutions yields an appropriate protection for discrete RF power LDMOSTs. 相似文献
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Michael Stockinger James W. Miller Michael G. Khazhinsky Cynthia A. Torres James C. Weldon Bryan D. Preble Martin J. Bayer Matthew Akers Vishnu G. Kamat 《Microelectronics Reliability》2005,45(2):211-222
A new, area efficient, boosted and distributed active MOSFET rail clamp network for I/O pad ESD protection is presented. In addition, a compact new rail clamp trigger circuit with high resistance to false triggering is introduced. 相似文献
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Copy protection system for digital home networks 总被引:1,自引:0,他引:1
This article describes the rationale supporting and design of a copy protection system called SmartRight. While carefully presenting our motivations, some light is shed on the very peculiar problems raised by the enforcement of copy protection. Hence, this article also explores less technical but highly important issues such as the legal and commercial aspects. 相似文献
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《Communications Magazine, IEEE》2008,46(9):136-143
Ethernet technologies are rapidly gaining importance as a prevailing solution for carrier networks. Ethernet ring protection switching, defined in ITU-T Recommendation G.8032, provides a means of achieving carrier network requirements for ring network topologies. This article outlines the novel concepts in this Ethernet ring protection switching mechanism and discusses the fundamental operating principles by which the automatic protection switching (APS) protocol works. In addition, several feature enhancements in protection behavior and solutions being considered for the next phase of standardization are discussed. 相似文献