共查询到20条相似文献,搜索用时 46 毫秒
1.
介绍了一种光电流对数压缩I/V转换电路的设计方法。该电路通过对数转换把光电二极管的宽动态范围的电流输入转换为低动态范围的电压输出,同时采用温度传感补偿电路来消除温度对对数转换电路的影响。 相似文献
2.
500mA VLDO(非常低压差稳压器)LT3021的输入电压为1.4~10V,输出电压为1.2V、1.5V和1.8V,在工作电流达500mA时,仍保持160mV的压降,静态电流为120μA,停机时电流低于3μA。用3.3μF的低ESR陶瓷输出电容器优化了稳定性和瞬态响应,其他特点包括0.05%的电压调节和0.2%的负载调节,内部保护电路包括电池反向保护、限流以及具迟滞和反向电流保护的热限制。 相似文献
3.
一种高精度能隙基准电压电路 总被引:2,自引:0,他引:2
在分析了几种基准电压源的基础上 ,设计并实现了一种高精度用于高速串行通信接口的 CMOS能隙基准电压电路。电路采用了两级高增益运放的优化结构 ,基于 TSMC公司的 CMOS 0 .2 5μm混合信号模型的仿真结果表明电路输出电压在 -5 0~ 70°C的温度内波动范围为 0 .0 5 7%。芯片流片测试结果发现基准电压电路在输入电压为 2 .5 V的条件下 ,工作在 -5 0~ 70°C的温度范围内 ,输出电压变化范围为 1 .2 3 3 7~ 1 .2 3 5 6V,输出电压变化率为 0 .1 5 4% ,与仿真结果之间的平均偏差为 0 .0 1 6%。能隙基准电压电路的版图面积为 1 5 8μm× 1 64μm。 相似文献
4.
设计了一种输出电压为0.72 V、带曲率补偿的带隙基准电路,该电路适用于收发器等数模混合电路。基于SMIC 0.18μm CMOS工艺,对电路进行了仿真和测试。结果表明,电路工作在1.5 V电源电压下时消耗100μA的电流,在1.3~1.8 V电压下以及-40℃~125℃温度范围内,可获得1.12×10-5V/℃的温度系数,电源抑制比为84 dB。 相似文献
5.
6.
7.
温度传感器LM94021及LM94022可提供4个不同增益让用户选择,分别是-5.5mV/℃、-8.2mV/℃、-10.9mV/℃及-13.6mV/℃,可监控-50~150℃范围内的温度。供电电压为1.5~5.5V,输出电压与感测的温度成反比,静态电流分别为9μA和5.4μA。 相似文献
8.
LT1761系列低压差线性稳压器是凌力尔特公司的产品,是一种微功耗、低噪声、输出100mA的低压差线性稳压器(LDO)系列。该系列主要特点:噪声低,在10Hz~100kHz时为20μVrms;静态电流低:20μA;输入电压范围宽,从1.8V-20V;输出电流可达100mA;有关闭电源控制,在关闭状态时耗电小于0.1uA;输入、输出电压差低,在输出100mA时为300mV;有固定电压输出(1.2V、1.5V、1.8V、2V、2.5V、2.8V、3V、3.3V、5V)及输出可调(1.22V到20V)的品种供用户选择; 相似文献
9.
低压差线性稳压器单片集成电路MCP1727的输入电压范围为2.3~6V,可调输出电压范围为0.8~5V,标准固定输出电压有0.8、1.2、1.8、2.5、3、3.3V和5V几种,输出电流容量为1.5A,输入与输出电压之差典型值是0.33V.静态电源电流仅约120μA。MCP1727主要应用于高速驱动器芯片组电源、网络底板卡、笔记本电脑、网络接口卡和掌上计算机中。 相似文献
10.
11.
Meihua Shen Wilfred Pau Nicolas Gani Jianping Wen Shashank Deshmukh Thorsten Lill Jian Zhang Hanming Wu Guqing Xing 《半导体技术》2004,29(8)
This paper presents a brief overview of the Applied Centura(R)DPS(R)system,configured with silicon etch DPS Ⅱ chamber, with emphasis on discussing tuning capability for CD uniformity control. It also presents the studies of etch process chemistry and film integration impact for an overall successful gate patterning development. Discussions will focus on resolutions to key issues, such as CD uniformity, line-edge roughness, and multilayer film etching integration. 相似文献
12.
White organic light-emitting devices based on fac tris(2- phenylpyridine) iridium sensitized 5,6,11,12-tetraphenylnap -hthacene 总被引:1,自引:0,他引:1
We have fabricated the white organic light-emitting devices (WOLEDs) based on 4,4' -bis(2,2 -diphenyl vinyl)-1,1' - biphenyl (DPVBi) and phosphorescence sensitized 5,6,11,12,-tetraphenylnaphthacene (rubrene). The device structure is ITO/2T-NATA (20 nm)/NPBX (20 nm)/CBP: x%Ir(ppy)3:0.5% rubrene (8 nm)/NPBX (5 nm)/DPVBi (30 nm)/Alq(30 nm)/LiF(0.5 nm)/A1. In the devices, DPVBi acts as a blue light-emitting layer, the rubrene is sensitized by a phosphorescent material, fac tris (2-phenylpyridine) iridium [Ir(ppy)3], acts as a yellow light-emitting layer, and N,N' -bis- (1-naphthyl)- N,N' -diphenyl -1, 1' -biphenyl-4,4' -diamine (NPBX) acts as a hole transporting and exciton blocker layer, respectively. When the concentration of Ir (PPY)3 is 6wt%, the maximum luminance is 24960 cd/m^2 at an applied voltage of 15 V, and the maximum luminous efficiency is 5.17 cd/A at an applied voltage of 8 V. 相似文献
13.
Complete approach to automatic identification and subpixel center location for ellipse feature 总被引:1,自引:0,他引:1
XUE Ting WU Bin SUN Mei YE Sheng-hua 《光电子快报》2008,4(1):51-54
To meet the need of automatic image features extraction with high precision in visual inspection, a complete approach to automatic identification and sub-pixel center location for similar-ellipse feature is proposed. In the method, the feature area is identified automatically based on the edge attribute, and the sub-pixel center location is accomplished with the leastsquare algorithm. It shows that the method is valid, practical, and has high precision by experiment. Meanwhile this method can meet the need of instrumentation of visual inspection because of easy realization and without man-machine interaction. 相似文献
14.
15.
Credence Systems Corporation 《半导体技术》2004,29(9)
Integrated circuits (ICs) intended for increasingly sophisticated automotive applications bring unique test demands. Advanced ICs for applications such as highly integrated automatic braking system (ABS) and airbag controllers combine high voltage digital channels, significant VI demands and precise timing capability. Along with continued missioncritical reliability concerns, the trend toward higher voltage operation and increased device integration requires specialized test capabilities able to extend across the wide operating ranges found in automotive applications. Among these capabilities, automotive test requirements increasingly dictate a need for a cost-effective versatile mixed-signal pin electronics with very high data rates reaching up to 50MHz with a voltage swing of-2 V to +28 V. 相似文献
16.
It is of interest to get appropriate information about the dynamic behaviour of rotating machinery parts in service. This paper presents an approach of optical vibration and deviation measurement of such parts. Essential of this method is an image derotator combined with a high speed camera or a laser doppler vibrometer (LDV). 相似文献
17.
正For a long time,optical and wireless systems/net-works are developed in separate communities witha few attempts for in-depth convergence.In fact,it prom-ises many advantages to combine the optical and wire-less technologies in the levels of systems and networks.Recently,both academia and industry have made manyefforts to enter a new phase of development to take op-tical and wireless systems as fully integrated networks.To provide high bandwidth and reliable service for bothfixed and mobile users,a well-designed network must 相似文献
18.
Zhang Xinsheng 《中国通信》2014,(1)
正Happy New Year!As we step into a new year,we take a look back at the key feature topics covered in China Communications over the past 12 months and set out our expecta- 相似文献
19.
正Cloud computing is a novel computing paradigm that utilizes remote cloud resources to achieve a high-performance computation.Cloud provides infrastructure,platform and software as different on-demand services.China has made remarkable progress in cloudbased products and operating system technology.The government,enterprises and research institutions are all active in the development of cloud computing-related projects.Despite the progress,many important problems 相似文献
20.