搜索结果

用户程序示例教程 The Blinky project is a simple program for the LPC2138using Keil MCB2130 Microcontroller Board. It blinks the LEDs at speed according to the Potentiometer setting and prints the current seting to the Serial Port 1.In addition it generates a sine wave with an adjustable frequency on ...

The XL6003 regulator is fixed frequency PWM Boost (step-up) DC/DC converter, capable ofdriving 1050mA load current with excellent line and load regulation. The regulator is simple to use because it includes internal frequency compensation and a fixed-frequency oscillator so that it requires a minimu ...

The PCA9534 is a 16-pin CMOS device that provide 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and was developed to enhance the NXP Semiconductors family of I2C-bus I/O expanders. The improvements include higher drive capability, 5 V I/O toleran ...

PCA9511, PCA9512, PCA9513, PCA9514, PCA9515, PCA9516, PCA9518,P82B96, P82B715Abstract - Philips Semiconductors family of Repeaters, Hubs and Expanders are detailed in this application notethat discusses device operation, maximum cable length and frequency calculations and typical applications.

Microchip ZigBee协议栈:ZigBee™ 是专为低速率传感器和控制网络设计的无线网络协议。有许多应用可从ZigBee 协议受益，其中可能的一些应用有：建筑自动化网络、住宅安防系统、工业控制网络、远程抄表以及PC 外设。与其他无线协议相比， ZigBee 无线协议提供了低复杂性、缩减的资源要求，最重要的是它提供了一组标准的 ...

基于变频调速的水平连铸机拉坯辊速度控制系统Frequency Inverter Based Drawing RollerS peedC ontrolSy stem ofHorizontal Continuous Casting MachineA 伟刘冲旅巴(南 华 大 学电气工程学院，衡阳421001)摘要拉坯辊速度控制是水平连铸工艺的关键技术之一，采用变频器实现水平连铸机拉坯辊速度程序控制，由信号发生装置给 ...

This application note shows how to achieve low-cost, efficient serial configuration for Spartan FPGA designs. The approachrecommended here takes advantage of unused resources in a design, thereby reducing the cost, part count, memory size,and board space associated with the serial configuration ci ...

选择映射法（SLM）和概率类算法都可以降低OFDM （Orthogonal Frequency Division Multiplexing）系统的PAPR（Peak to Average Power Ratio），传统SLM算法自身较为复杂，但由于其优良的性能，弃之可惜。研究表明，SLM算法和限幅类算法在性能上具有一定的互补性。任何一个算法未必能达到抑制PAPR的理想效果，在深入研究了两 ...

正交频分复用技术（Orthogonal Frequency Division Multiplexing， OFDM）非常适合高速通信系统，但存在高峰均功率比（PAPR）的问题。对OFDM系统中如何降低PARR的问题进行了研究，讨论了降低PAPR的主要方法，重点分析了选择性映射法（SLM），并在此基础上提出了一种基于预编码矩阵的改进算法，最后通过matlab进行了算法仿真 ...

Abstract: Many industrial/scientific/medical (ISM) band radio frequency (RF) receivers use an external Sallen-Key datafilter and a data slicer to generate the baseband digital output. This tutorial describes the ISM-RF Baseband Calculator,which can be used to calculate the filter capacitor values ...