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近期,意法半导体针对控制应用大幅扩展基于cortex-M3处理器内核的STM32产品系列,使32位微控制器的设计更加灵活,应用更为广泛。同时,STM32系列为意法半导体建立了领先地位。意法半导体改写市场结构的32位STM32系列微控制器,在系统可伸缩性和外设选择性方面全面升级。自2007年问世 相似文献
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正5年前,意法半导体(ST)开始推STM32系列微控制器产品,日前其刚刚推出全新STM32F0系列32位微控制器,至此,ST的STM32微控制器产品阵容已具有五大产品系列,300多款引脚相互兼容的产品。ST微控制器全球市场部总监Daniel Colonna介绍说,新推出的STM32 F0新系列 相似文献
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"STM32系列微控制器是业内最为成功的基于ARM-M处理器的32位微控制器,根据ARM的统计,从2007年-2011年,售出的基于Cortex-M内核微控制器中,STM32的累积出货占总额的45%,几乎每两颗中就有一颗是STM32。"意法半导体(STMicroelectronics)副总裁兼微控制器、存储器和安全微控制器产品部总经理Claude Dardanne说。 相似文献
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《现代电子技术》2017,(8):129-133
传统的数控机床步进电机控制模块无法有效协调步进电机速度参数间的关系,导致其控制精度不高。为此,设计数控机床步进电机高精度控制模块。模块中的STM32F103微控制器根据综合线性速度控制函数,给出步进电机运行流程的控制指令。FPGA根据控制指令生成控制信号,传输给步进电机驱动器。步进电机驱动器根据控制信号中控制位置的排序,依次将控制电流导入步进电机,实现模块对被控对象的准确控制。光栅传感器对步进电机的运行流程进行采集,FPGA通过分析采集信息,给出步进电机的具体运行成果并传输给STM32F103微控制器,实现STM32F103微控制器对步进电机运行流程的实时监控和修正。实验结果表明,所设计的模块具有优良的响应效果、控制误差和控制成果,可实现高精度控制。 相似文献
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A postfabrication technique for writing fiber Bragg gratings in H 2-loaded fiber with precise wavelength control is reported. The grating wavelength is highly stable and less than a 0.01-nm shift was observed after storing at room temperature for two months. This technique allows 1 nm of wavelength trimming and significantly enhances the grating thermal stability 相似文献
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Transmission characteristics of a CPFSK differential detection system with LD direct modulation are studied by computer simulation. Simulation results show that the optimum wavelength for LD direct modulation CPFSK transmission shifts to a wavelength longer than zero dispersion wavelength because of the phase difference between the intensity and frequency modulation components. A precise investigation of the dependence of optimum total dispersion on several parameters reveals the essential role of the phase difference between intensity and frequency modulation induced by LD direct modulation. The transmission distance allowing a 1-dB power penalty at 10 Gb/s is 117 km for a wavelength 30 nm shorter than the zero dispersion wavelength, while the distance is 183 km for a wavelength 30 nm longer. This indicates that the zero dispersion wavelength shift is 11 nm for 100-km transmission 相似文献
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Lee T.-P. Zah C.E. Bhat R. Young W.C. Pathak B. Favire F. Lin P.S.D. Andreadakis N.C. Caneau C. Rahjel A.W. Koza M. Gamelin J.K. Curtis L. Mahoney D.D. Lepore A. 《Lightwave Technology, Journal of》1996,14(6):967-976
We discuss the design, fabrication, and performance of experimental multiwavelength laser array transmitters that have been used in the reconfigurable optical network testbed for the Optical Network Technology Consortium (ONTC). The experimental four-node multiwavelength network testbed is SONET/ATM compatible. It has employed multiwavelength DFB laser arrays with 4 nm wavelength spacing for the first time. The testbed has demonstrated that multiwavelength DFB laser arrays are indeed practical and reproducible. For the DFB laser arrays used in such a network the precise wavelength spacing in the array and the absolute wavelength control are the most challenging tasks. We have obtained wavelength accuracy better than ±0.35 nm for all lasers, with some registered to better than ±0.2 nm. We have also studied the array yield of our devices and used wavelength redundancy to improve the array yield. Coupling efficiencies between -2.1 to -4.5 dB for each wavelength channel have been obtained. It is achieved by using specially designed lensed fiber arrays placed on a silicon V-grooved substrate to exactly match the laser spacing. The transmitter consisted of a multichip module containing a DFB laser array, an eight-channel driver array based on GaAs IC's, and associated RF circuitry 相似文献
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以红外分布反馈激光器激发光源为核心的检测装置中,分布反馈激光器发光波长的控制精度及稳定性直接决定检测装置测量准确性。为此研发了一种采用模拟PID控制的分布反馈激光器温度控制系统。该系统采用模拟比例-积分-微分温度前向控制模块和温度实时后向采集模块达到控制温度的目的。温度控制实验中采用激射中心波长为2 049 nm的分布反馈激光器,结果表明,系统温度控制稳定性为0.05℃,稳定时间小于30 s。同时,利用所研制的温度控制系统对上述可调谐DFB激光器做了光谱测试实验,结果表明,当激光器驱动电流固定时,激光器激射波长与其工作温度呈线性关系。 相似文献
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A 6 mu s switching time has been measured for a 2.2 nm bandpass integrated acousto-optic filter operating at 1550 nm, requiring only 15 mW of RF power per wavelength channel and capable of operation as a 1*1, 1*2 or 2*2 wavelength switch with simultaneous and independent control of numerous wavelength channels.<> 相似文献
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通过纳米粒子束流气相沉积方法在衬底表面沉积稠密银纳米粒子点阵。通过对纳米粒子覆盖率的精细控制与纳米粒子点阵消光谱的实时监测,实现了其表面等离激元共振峰频率的系统调控。随着Ag纳米粒子密度的增加,点阵的表面等离激元共振波长发生红移,可逐步由小于400nm增大到570nm以上。研究发现,表面等离激元共振波长的变化与随纳米粒子沉积量增加而增加的紧密相邻的纳米粒子对的百分数相关。 相似文献