共查询到20条相似文献,搜索用时 93 毫秒
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本文简要地介绍了H^ -ISFET(氢离子敏场效应晶体管)的基本结构和工作原理,分析了目前多数常规H^ -ISFET在结构上的不足之处和对实际pH值测量结果的不利影响,提出了一种实用型背面接触式H^ -ISFET。同时,文中对该结构在版图设计和工艺设计中的有关问题,进行了有益的探讨。最后指出:这种背面接触式H^ -ISFET在实际pH值的测量中有较好的实用价值。 相似文献
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本文介绍了湿度传感器单元SYH-2的特性以及由它组成的湿度传感器SY-HS-210性能。 相似文献
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The Hunt For The Kill Switch 总被引:1,自引:0,他引:1
《Spectrum, IEEE》2008,45(5):34-39
This paper has described the issues on electronic circuits which are made for military equipments.The DoD of U.S. recently launched its most ambitious program yet to verify the integrity of the electronics that will underpin future additions to its arsenal. The Defense Advanced Research Projects Agency (DARPA), the Pentagon's R&D wing, and released details about a three-year initiative it calls the Trust in Integrated Circuits program. The findings from the program could give the military and defense contractors who make sensitive microelectronics like the weapons systems for the F-35 a guaranteed method of determining whether their chips have been compromised. The Trust program started its prequalifying rounds by sending to three contractors four identical versions of a chip that contained unspecified malicious circuitry, though U.S. military consumes only 1% of world's integrated circuits. 相似文献
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由于金属-半导体-金属光电探测器潜在的优点,用于光通信、高速片到片互连、以及光控受到极大关注,文中介绍这种光探测器及其与放大器单片集成的最新进展。 相似文献
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The global positioning system 总被引:1,自引:0,他引:1
《Microwave Theory and Techniques》2002,50(3):645-652
The paper provides a top-level perspective on how the global positioning system works, how its services are used, and delves into the most important technical and geo-political factors affecting its long-term availability in an international setting 相似文献
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The discrete polynomial-phase transform 总被引:12,自引:0,他引:12
The discrete polynomial-phase transform (DPT) is a new tool for analyzing constant-amplitude polynomial-phase signals. The main properties of the DPT are its ability to identify the degree of the phase polynomial and to estimate its coefficients. The transform is robust to deviations from the ideal signal model, such as slowly-varying amplitude, additive noise and nonpolynomial phase. The authors define the DPT, derive its basic properties, and use it to develop computationally efficient estimation and detection algorithms. A statistical accuracy analysis of the estimated parameters is also presented 相似文献
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This paper describes a new type of planar thin-film cryotron namely, an in-line cryotron, and compares its advantages to the crossed-film cryotron. This cryotron has its gate and control elements superimposed and parallel, or in-line, whereas the crossed-film device has its gate and control elements crossed at right angles. The gain curve for the in-line cryotron has a region where incremental gains of one to ten may be obtained without a change in the gate-to-control width ratio Wg/Wc whereas large gains are not possible for the crossed-film cryotron without altering the width ratio. Larger gate resistances are possible within the in-line cryotron and calculations are given to show it is feasible to properly terminate low impedance strip transmission lines with characteristic impedances in the range of 0.1 to 1.0 ohms. It is necessary to properly terminate the strip transmission lines commonly used in superconducting circuit fabrication in order to achieve the maximum circuit switching speeds. Other advantages and the disadvantages of the in-line cryton are also discussed. 相似文献
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Super FEC技术 总被引:1,自引:0,他引:1
结合现有的SuperFEC产品介绍了SuperFEC技术,就其发展现状指出了SuperFEC存在的非标准性和非透明性的缺陷,并提出了SuperFEC规范化的方法。 相似文献
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《Spectrum, IEEE》2008,45(12):36-41
Car buyers everywhere are spurning gas guzzlers, and some carmakers feel the pain more than others. Take Mercedes-Benz, long known for its luxury cars?its flagship S-Class is a full-size sedan that starts at around US $90,000. Without sacrificing performance or comfort, the company must meet the expectations of its increasingly environmentally conscious customers. 相似文献