共查询到20条相似文献,搜索用时 78 毫秒
1.
为了将绝热CMOS电路嵌入到传统电路系统中替代耗能较大的部件,本文研究并设计绝热CMOS电路和传统CMOS电路两者之间的接口电路:传统CMOS到绝热CMOS (Traditional CMOS to Adiabatic CMOS, TC/AC)的接口电路、绝热CMOS到传统CMOS (Adiabatic CMOS to Traditional CMOS, AC/TC)的接口电路。这样传统CMOS电路可以通过TC/AC接口电路来驱动绝热CMOS电路,绝热CMOS电路可以通过AC/TC接口电路来驱动传统CMOS电路,从而可以利用具低功耗特性的绝热CMOS电路来降低整个电路系统的功耗,增强绝热CMOS电路的实用性。最后计算机模拟验证了TC/AC接口电路和AC/TC接口电路逻辑功能的正确性。 相似文献
2.
3.
4.
5.
在电子系统中,CMOS接口集成电路是去各连线接点的入口。若这些外部接点操作错误,会因对地短路或因加上了导致闭锁关断的电压而损坏接口集成电路。图1所示电路通过检测过大的电流来保护CMOS接口集成电路。IC1对流入接口电路的电源电流Is进行监测,如果Is超过了设计的阈值,IC1便 相似文献
6.
7.
8.
CMOS接口IC对于电子系统中的接线连接起到入口“门”的作用。如果误操作那些外部连接以致造成接地短路或造成闩锁结果的电压都可能会损害接口IC。图1所示电路是一个能够通过电流的敏感而保护CMOS接口的电路。IC监视到达接口电路的供电电流(Is),如果Is超过编程的阈值,便迅速从接口去掉电流和电压。在正常运作期间,来自IC_1输出端的电流(Is的1/2000)流经R_3达到逻辑低电平:IC_2的输出低于“或非”门的输 相似文献
9.
BBD结构红外焦平面CMOS_TDI读出电路 总被引:2,自引:0,他引:2
BBD(戽链器件)因能与标准CMOS工艺兼容而受到了人们的重视.许多人开始研究基于BBD结构的红外焦平面读出电路,即以BBD结构实现时间延迟和积分功能(CMOS_TDI).基于CMOS的读出电路驱动时钟简单,采用标准逻辑电源电压工作,与外界电路之间的接口方便;并且工作电压较低,使读出电路可以实现微功耗;可以将信号读取和处理电路、驱动与控制电路甚至A/D转换器、数字信号处理电路以及全数字接口电路等完全集成在一起,实现所谓的"智能型"红外焦平面;另外,由于采用标准的CMOS工艺,因而又具有低成本的特点. 相似文献
10.
适用于笔记本电脑的高性能CMOS LVDS驱动器的设计 总被引:1,自引:0,他引:1
提出了一种适用于笔记本电脑平板显示嚣接口的高性能CMOS LVDS(Low Voltage Differential Signaling)驱动器的设计方法。用高性能CMOS LVDS驱动器作I/O接口单元是减小当前CMOS工艺芯片内外速度差异的重要手段。文章着重分析了高性能CMOS LVDS驱动器的电路结构及其工作原理,采用TSMC的0.25μm CMOS工艺模型,在Cadence环境下用Spectre仿真器进行模拟,给出了该驱动器的仿真结果。 相似文献
11.
Michael Reilly 《半导体技术》2004,29(12)
DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system. 相似文献
12.
Thomas M.Trexler 《半导体技术》2004,29(5)
From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test. 相似文献
13.
The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high. 相似文献
14.
The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation. 相似文献
15.
Today, micro-system technology and the development of new MEMS (Micro-Electro-Mechanical Systems) are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible. 相似文献
16.
Qi-jiang Ran Pei-de Han Yu-jun Quan Li-peng Gao Fan-ping Zeng Chun-hua Zhao 《光电子快报》2008,4(4):239-242
This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel's. 相似文献
17.
In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal (200) (2d = 0.4027 nm) is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line(w), the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line(x), the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines(y), the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line(z) in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line(q) in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution(λ/△ 2) is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy. 相似文献
18.
High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET > PDMAT > TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center. 相似文献
19.
It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output(MIMO) communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory. 相似文献
20.
This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors. 相似文献