200981151754936

无刷直流电机结构图，用visio画的，可以粘贴到论文中(Brushless DC motor structure diagram)

数据流图定义 DFD = Data Flow Diagram,数据流图 数据流图（Data Flow Diagram，DFD）是一种能全面地描述信息系统逻辑模型的主要工具，它可以用少...共20次编辑(Definition of data flow diagram DFD = Data Flow Diagram, data flow diagram data flow diagram (Data Flow Diagram, DFD) is an information system can fully describe a logical model of the main tools, which can be used 20 times less ... Edit)

在无线通信中使用跳频技术是军事通信中最主要的抗干扰手段之一, 而如果系统中能使用合适的中心频率可以快速跟踪跳频变化的带通滤波器将可以明显改善系统的抗干扰性能。文中从实际应用出发, 比较了几种可用于实现带通滤波器快速变频的方案, 选择了简单、实用的开关电容阵改变带通滤波器中心频率的方案(The use of frequency hopping in wireless communication technology is the most important anti-jamming in military communications, one of the means, and if the system can use the appropriate center frequency can be fast-tracked changes in frequency-hopping band-pass filter will be able to significantly improve the system anti-jamming性能. This paper from the actual application, the comparison of several band-pass filter can be used to achieve the rapid conversion of the program, choose a simple, practical switched capacitor array to change the center frequency of band-pass filter program)

example of BCH and RS codecs

LPC1788官方原理图文件，PCB文件暂时我也没有，不过在设计时这篇文档还是有极大参考(LPC1788 official schematic documents, PCB files temporarily I did not, but in the design of this document or a great reference)

A Structural Patch Decomposition Approach

Interfacing microcontroller using RF transceiver

说明：  提供了三套ZigBee兼容的 平台，为我们的客户提供一种 只需要添加应用的解决方案。 所有的三种解决方案都是建立 在CC2420/CC2520上，而且 有很好的共存性。这些兼容的 平台缩短了产品进入市场的时 间，简化了系统设计和ZigBee 终端产品的验证。(Provided three sets of ZigBee-compliant platform, to offer our customers only need to add the application of a solution. All three solutions are built on CC2420/CC2520, but also the co-existence of good. These platform compatible product to shorten time-to-market and simplifies the system design and test ZigBee end-products.)

Voltage and Frequency control of wind diesel hybrid system with variable speed wind turbine

：介绍了一种基于数字信号处理器（DSP）的移相调频（Phase-Shifted and Frequency-Varied，PSFV）PWM控制 逆变电源，给出了主电路拓扑结构，分析了其控制原理并设计了其控制程序流程图。新颖的PSFV 控制能够实现输出 电压90％的调整率，输出电流波动小于单纯移相调功PWM方式，并在轻载时保持连续。功率开关器件零电压零电流 通断（Zero-Voltage-Zero-Current Switching，ZVZCS）软开关的实现，有利于进一步提高开关频率和降低开关损耗。采用 高性能的专用DSP 芯片TMS320F2812 实现了系统的数字控制，满足了系统控制的灵活性和实时性，减小了系统的 体积和生产成本。仿真分析和实验结果证明了此控制模式的可行性与合理性。()