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1.
x   总被引:1,自引:0,他引:1  
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2.
ADI推出一系列低压差(LDO)稳压器产品,针对低噪声电源所需的输入电压和输出电压性能进行了优化。ADP1740、ADP1741、ADP1752、ADP1753和ADP1754 LDO提供800mA、1.2A和2A的负载电流,其低Vin单轨输入能改善转换效率,具备出色的PSSR(电源抑制比),可支持现今的高性能信号链。此外,这些新产品所需的元件数量较少,  相似文献   

3.
Epitaxial heterostructures produced on the basis of Al x Ga1 ? x As and Ga x In1 ? x P ternary alloys by metal-organic chemical vapor deposition are studied. The composition parameter x of the alloys was ~0.50. By X-ray diffraction studies, scanning electron microscopy, atomic force microscopy, and photoluminescence spectroscopy, it is shown that superstructured ordered phases with the stoichiometry composition III1 ? ηIII1 + ηV2 can be formed. As a consequence of this effect, not only does the cubic crystal symmetry change to the tetragonal type in the new compound, but also the optical properties become different from those of disordered alloy with the same composition.  相似文献   

4.
Silicon Laboratories推出节能单片机(MCU)和无线MCU解决方案,该方案特别适用于功耗敏感的嵌入式应用。C8051F96xMCU、Si102x和Si103x无线MCU系列产品基于低功耗专利技术。  相似文献   

5.
意法半导体推出两款新系列低功耗运算放大器。新产品精度更高且封装面积更小。意法半导体的TSV85x和LMV82x运算放大器旨在升级计算机、工业以及医疗领域信号调节用行业标准运算放大器(LMV321)。  相似文献   

6.
ADI推出设计用于LTE和第四代(4G)蜂窝基站的高集成度RFIC(射频集成电路)系列。为解决射频卡的高密度集成问题,ADI公司推出的新型ADRF660x系列混频器与ADRF670x系列调制器将多个分立功能模块集成到单个器件,并能满足更高容量基站所需要的严苛性能,实现了这些高密度射频卡。通过这种前所未有的集成度,基站制造商可以将电路板空间显著缩小60%,并大幅降低材料清单成本。  相似文献   

7.
智能混合信号连接解决方案开发商SMSC近日发布其在高速USB 2.0连接领域取得的最新成就——USB333x/334x ULPI收发器系列。新推出的USB收发器通过SMSC的RapidCharge Anywhere功能支持最新的USBIF电池充电1.1规范,能够大幅缩短电池充电所需的时间。与传统USB端口相比,新的USB333x/334x产品系列允许智能手机和其它便携式设备获得高达3倍的充电电流,从而快速完成充电。  相似文献   

8.
SiliconLaboratories推出新高性能8位单片机(MCU)系列产品,通过在极小封装内集成高性能模拟外设和极速8051CPU内核,新型C8051F39x/7xMCU系列产品为光传输模块、传感器接口以及电风扇、烘干机、吸尘器、遥控玩具车等无刷直流电机应用提供优化的解决方案。  相似文献   

9.
Silicon Laboratories推出两类USBMCU系列产品,是更快、更易用和经济的USB连接方案。C8051F38x和C8051T62x/32x USBMCU系列适用于家居自动化系统、温度调节器、USB适配器、智能卡阅读器、GPS定位器等。  相似文献   

10.
Light-element-containing CaAl2Si2-type Zintl phases CaZn2?x Cu x P2 and CaMnZn1?x Cu x P2 (x = 0.0–0.2) have been synthesized by solid-state reaction. Electrical resistivity (ρ), Seebeck coefficient (α), and thermal conductivity (κ) were measured over a wide temperature (T) range (80–1000 K) to evaluate the thermoelectric potential of these materials. Below 300 K, the power factor (PF; α 2/ρ) is very small. Above 600 K, however, PF increases rapidly for all compositions because of a rapid increase of α and a simultaneous decrease of ρ. The measured large α is consistent with the wider band gap expected for these compositions. Compared with the pure compounds, larger PF values are observed for the Cu-substituted compounds; the largest observed PF is ~0.5 mW/m K2. The thermal conductivity is found to be rather low, despite the presence of light elements, and is in the range 1.0–1.5 W/m K at 1000 K. Because of the combination of low κ and moderate PF values, the dimensionless figure of merit ZT = α 2 T/ρκ reaches a maximum of 0.4 for CaZn1.9Cu0.1P2.  相似文献   

11.
A ZnO/Zn1?x Mg x O-based quantum cascade laser (QCL) is proposed as a candidate for generation of THz radiation at room temperature. The structural and material properties, field dependence of the THz lasing frequency, and generated power are reported for a resonant phonon ZnO/Zn0.95Mg0.05O QCL emitting at 5.27 THz. The theoretical results are compared with those from GaN/Al x Ga1?x N QCLs of similar geometry. Higher calculated optical output powers [ $ {P}_{\rm{ZnMgO}} $  = 2.89 mW (nonpolar) at 5.27 THz and 2.75 mW (polar) at 4.93 THz] are obtained with the ZnO/Zn0.95Mg0.05O structure as compared with GaN/Al0.05Ga0.95N QCLs [ $ {P}_{\rm{AlGaN}} $  = 2.37 mW (nonpolar) at 4.67 THz and 2.29 mW (polar) at 4.52 THz]. Furthermore, a higher wall-plug efficiency (WPE) is obtained for ZnO/ZnMgO QCLs [24.61% (nonpolar) and 23.12% (polar)] when compared with GaN/AlGaN structures [14.11% (nonpolar) and 13.87% (polar)]. These results show that ZnO/ZnMgO material is optimally suited for THz QCLs.  相似文献   

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14.
Acer 10x DVD-ROM     
采用托盘式光盘进退方式,其IDE接口能支持Ultra ATA/33传输模式,提供支持读取8cm光盘及直立工作能力,附赠“PowerDVD”及“PowerPlayer”应用软件  相似文献   

15.
京瓷FinecamS3x     
《新潮电子》2002,(8):38-38
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16.
Avago公司推出MGA-43x28系列功率放大器,它可以提供微型和企业用毫微型系统最后一级的增益,带来34dB-40dB增益以及15%-13.8%的高功率附加效率。  相似文献   

17.
Bi1?x Sb x solid solutions have attracted much attention as promising low-temperature thermoelectric materials. Previously, we observed distinct extrema in the isotherms of the transport and mechanical properties of polycrystalline Bi1?x Sb x and attributed their presence to the transition from diluted to concentrated solid solutions and to the reconstruction of the energy band structure under increasing Sb concentration. The goal of the present work is a detailed study of the concentration dependences of the thermal conductivity λ for Bi1?x Sb x polycrystalline solid solutions (x = 0 to 0.09) in the temperature range of 170 K to 300 K. It is established that the λ(x) dependences exhibit a nonmonotonic behavior: in certain concentration ranges an anomalous increase in λ with increasing x is observed. It is shown that the concentration dependences of the thermoelectric figure of merit calculated on the basis of the measured λ values are also nonmonotonic. The obtained data represent additional evidence in favor of our assumptions stated earlier about a significant effect of electronic phase transitions observed in Bi1?x Sb x solid solutions on the concentration dependences of their thermoelectric properties. These results should be taken into account when developing new Bi1?x Sb x -based materials.  相似文献   

18.
《电子显微学报》2009,(3):F0004-F0004
Quantax50系列扫描电子显微镜是FEI公司最新一代的通用型扫描电子显微镜,是FEI著名的Quanta产品家族的第三代产品。真正的多用途扫描电镜。  相似文献   

19.
光盘置盘方式上除了有吸入式的机种外!也会推出采用托盘式的机型,采用支持Ultra ATA/33模式的IDE接口,可惜并未具备面板播放功能及8cm光盘读取能力  相似文献   

20.
除IDE接口的产品外,也即将推出SCSI接口机型。采用托盘式置盘方式设计,虽未具备面板播放功能,但厂商额外提供了“博德之门”DVD版游戏光盘  相似文献   

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