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1.
本文给出了一个利用中芯国际0.18μm CMOS工艺设计的用于蓝牙应用的单片低噪声放大器。放大器采用片内集成的螺旋电感实现单片集成的低噪声放大。在1.8V伏电源下,工作电流为2mA,在频率2.4GHz下功率增益大于10dB,输入反射小于-20dB。  相似文献   

2.
基于70 nm InP HEMT工艺,设计了一款五级共源放大级联结构230~250 GHz低噪声太赫兹单片集成电路(TMIC)。该放大器采用扇形线和微带线构成栅极和源极直流偏置网络,用以隔离射频信号和直流偏置信号;基于噪声匹配技术设计了放大器的第一级和第二级,基于功率匹配技术设计了中间两级,最后一级重点完成输出匹配。在片测试结果表明,230~250 GHz频率范围内,低噪声放大器的小信号增益大于20 dB。采用Y因子法对封装后的低噪声放大器模块完成了噪声测试,频率为243~248 GHz时该MMIC放大器噪声系数优于7.5 dB,与HBT和CMOS工艺相比,基于HEMT工艺的低噪声放大器具有3 dB以上的噪声系数优势。  相似文献   

3.
采用0.18μm1.8V mixed CMOS工艺设计并实现了一种应用于GPS接收机的CMOS低噪声放大器,采用片内螺旋电感实现输入匹配和单片集成。测试结果表明在1.575GHz时,工作电流8mA,增益20dB,噪声系数小于1.7dB,IIP3为-10dBm。  相似文献   

4.
李竹  陈志恒一  王志功 《电子器件》2004,27(1):72-74,142
无线接收机小型化及低成本的发展趋势,要求人们解决高集成度及低功率的问题,从而推动了将射频部分与基带电路部分实现单片集成的研究,我们给出了利用0.18μm CMOS工艺设计的5.2GHz低噪声放大器。在1.8v电压下,工作电流为24mA增益为15.8dB噪声系数为1.4dB。  相似文献   

5.
本文给出了一个采用TSMC 0.18 m CMOS工艺应用于X波段SAR(合成孔径雷达)的单片接收机射频前端的设计。接收机前端由低噪声放大器和混频器组成,低噪声放大器工作在9 GHz~11GHz,混频器将10GHz的射频信号转换到2GHz中频,本振信号由片外提供。在X波段频率下,尽管CMOS 0.18μm工艺特征频率比较低,工作仍然实现了低噪声系数,提高了集成度。测试结果表明,本设计在300MHz的带宽上实现了20dB的转换增益,噪声系数达到2.7Db,输入1dB压缩点达到-19.2dBm,在1.8V的电源电压下前端消耗26.6mA电流,芯片面积为1.3×0.97mm2。  相似文献   

6.
一种5.7 GHz CMOS 全集成低噪声放大器的设计   总被引:1,自引:0,他引:1  
邓桂萍  王春华 《微电子学》2007,37(2):214-216,220
提出并设计了一种可以完全单片集成的5.7 GHz低噪声放大器(LNA)。该电路结构利用MOSFET自身的栅寄生电阻,通过简单的LC网络变换实现输入匹配;并采用跨阻结构,实现输出匹配。该电路采用TSMC 0.35μm CMOS工艺,用ADS模拟软件进行分析与优化。结果表明,设计的低噪声放大器,其增益为11.34 dB,噪声系数为2.2 dB,功耗12 mW,输入反射系数-33dB,线性度-4 dBm。  相似文献   

7.
基于共源级联放大器的小信号模型,详细分析了宽带放大器的输入阻抗特性和噪声特性.利用MOS晶体管的寄生容性反馈机理,采用TSMC公司标准0.18 μm CMOS工艺设计实现了单片集成宽带低噪声放大器,芯片尺寸为0.6 mm×1.5 mm.测试结果表明,在3.1~5.2 GHz频段内,S11<-15dB,S21>12dB,S22<-12 dB,噪声系数NF<3.1dB.电源电压为1.8V,功耗为14mW.  相似文献   

8.
结合混合微波集成电路(HMIC)工艺和砷化镓单片微波集成电路(MMIC)工艺各自优势,设计制作了一款小型化大功率S波段平衡式限幅MMIC低噪声放大器.采用平衡式结构,提高了限幅功率容量和可靠性.由于金丝键合线的等效电感具有更高Q值,低噪声放大器单片的输入匹配采用外部金丝键合线匹配,有效降低了低噪声放大器单片的噪声系数.限幅器采用混合集成工艺制成,能够耐受较大功率.利用微波仿真软件,设计制作了兰格(Lange)电桥、限幅电路和低噪声放大器输入匹配等电路.最终产品尺寸仅为22 mm×16 mm×6 mm,在2.7~3.5 GHz内增益27 ~ 28 dB,噪声系数小于1.3 dB,驻波比小于1.3,该平衡限幅MMIC低噪声放大器可承受功率超过200 W、占空比为15%的脉冲功率冲击.  相似文献   

9.
介绍了一种基于0.35μm CMOS数字工艺、集成于单片蓝牙收发器中的射频低噪声放大器.在考虑ESD保护和封装的情况下,从噪声优化、阻抗匹配及增益的角度讨论了电路的设计方法.经测试,在2.05GHz的中心频率处,S11为-6.4dB,S21为11dB,3dB带宽约为300MHz,噪声系数为5.3dB.该结果表明,射频电路设计需要全面考虑寄生效应,需要合适的封装模型以及合理的工艺.  相似文献   

10.
结合一个2.4 GHz CMOS低噪声放大器(LNA)电路,介绍如何利用Cadence软件系列中的IC 5.1.41完成CMOS低噪声放大器设计.首先给出CMOS低噪声放大器设计的电路参数计算方法,然后结合计算结果,利用Cadence软件进行电路的原理图仿真,并完成了电路版图设计以及后仿真.仿真结果表明,电路的输入/输出均得到较好的匹配.由于寄生参数,使得电路的噪声性能有约3 dB的降低.对利用Cadence软件完成CMOS射频集成电路设计,特别是低噪声放大器设计有较好的参考价值.  相似文献   

11.
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.
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   

13.
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   

14.
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   

15.
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   

16.
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   

17.
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   

18.
Waveguide multilayer optical card (WMOC) is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling & processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic (VB) language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.  相似文献   

19.
The effect of laser microbeam trapping the bioparticles has been appfied widely in the biology .However the micromechanism of the acting that realizes the laser-microbeam trapping bioparticles is still lacking. In this paper ,the act microchenism of the gradiant force of laser microbeam for the bioparticles is analysed by means of quantum theory ,The result accords with our experiment.  相似文献   

20.
Using multiple importance sampling (MIS) technique, the optical communication system performance affected by polarization-mode dispersion (PMD) and polarization-dependent loss (PDL) is simulated numerically. The power penalties and system outage probabilities are obtained for optical communication systems with on-off keying (OOK) or differential phase shift keying (DPSK) modulation. The simulation results show that DPSK always performs better than OOK. When the system has moderate PDL (about 1.5 dB), it is necessary to compensate effectively the fiber PMD in order to enhance the system tolerance to the PMD and PDL. However, the efficiency of PMD compensation will degrade rapidly when the PMD of the whole optical link drops into the low value.  相似文献   

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