FPGA毕设.doc

摘 要 本设计介绍了用FPGA对信号发生器进行控制的函数发生器，然后经功率放大器使之产生固定要求的电磁场来清除水垢水垢分解常用方法吸附正负离子，使之分解。水垢处理的频率在2MHZ到20MHZ范围内。MAX038具有可调频率特性其频率范围为1HZ到20MHZ。满足要求，其还具有占空比可调等优点MAX038与FPGA的连接用X9313数控电位器。实现了数字与模拟的转换。因功放电路带宽等要求，功率放大器不能用集成来实现所以用分立元器件搭建的电路。主要的电路部分是MAX038与FPGA连接的模块。其全部电路图均用DXP软件来做。 关键词：MAX038 ；X9313 ；DXP Abstract This subject introduces signal Generator, function generator,The subject describes the function generator with the control of Signal Generator at FPGA. Through the Generated of the power amplifier ,we need a fixed magnetic field to Clear scale. There are several common methods of the Scale decomposition：The first is the use of electric field. The scale cans decomposition in Adsorption of positive and negative electromagnetic fields. the frequency of the scale cleaning 2MHZ to 20MHZ. MAX038 owes the features of adjustable frequency. The frequency‘s range is between 1HZ and 20MHZ. In order to meet the requirements, he has the advantage of adjustable duty cycle. Connect Digital power controller named X9313 with MAX038 and FPGA. It achieves the digital and analog conversion. Bandwidth requirements for power amplifier, power amplifier cannot be used to achieve integration, so the circuit built using discrete components. The major part of the circuit is connected with the FPGA module. All of its circuits are to do with the DXP software. There is no specific integration of high frequency high wattage components, so interference and other adverse factors such as poor impact; it will make power amplifier distortion. Key words: MAX038; X9511; DXP 目 录 1 引 言 1 1.1 科学意义和社会应用前景 1 1.2 国内外研究概况、水平和发展趋势 1 1.3 高频的基本原理 2 2 总体设计原理 4 2.1水垢生产的机理 4 2.2 清除水垢方法 4 2.3 设计原理 5 3 高频信号发生器设计 6 3.1 DXP软件介绍 6 3.2 设计指标 6 3.3 方案论证与比较 7 3.4 MAX038芯片介绍 8 3.4.1 MAX038简介 8 3.4.2 芯片引脚 8 3.4.3 MAX038 内部电路图 9 3.5 频率、幅值及占空比控制 10 3.6 芯片X9511介绍 11 3.7 正弦波发生器设计 13 3.8 正弦波电路PCB和示波器波形 14 4 功率放大器设计 17 4.1 常见功放种类 17 4.2 功放的输出 18 4.2.1 定阻式输出 18 4.2.2 定压式输出 18 4.3 功率放大器的组成 18 4.4 功率放大器原理 18 4.5 功率放大器电流的特点 20 4.6 功率放大器术语