array(3) { ["data"] => array(20) { [0] => array(11) { ["tagname"] => string(15) "信号发生器" ["inlink"] => int(0) ["addtime"] => string(10) "1598923166" ["tagid"] => int(834266) ["id"] => string(6) "834266" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503938414706693) ["pageurl"] => string(35) "//www.sheji456.com/ask/tlist/834266" ["m_pageurl"] => string(33) "//m.sheji456.com/ask/tlist/834266" } [1] => array(11) { ["tagname"] => string(39) "多功能报告厅设计规范是什么" ["inlink"] => int(0) ["addtime"] => string(10) "1599530139" ["tagid"] => int(1175896) ["id"] => string(7) "1175896" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503950206992399) ["pageurl"] => string(36) "//www.sheji456.com/ask/tlist/1175896" ["m_pageurl"] => string(34) "//m.sheji456.com/ask/tlist/1175896" } [2] => array(11) { ["tagname"] => string(14) "手里有30万" ["inlink"] => int(0) ["addtime"] => string(10) "1600480951" ["tagid"] 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多功能信号发生器设计报告哪位手里有？

多功能信号发生器设计报告哪位手里有？

浏览：37次 | 提问时间： 07-29 08:17

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爱我你不够资格ぅ 07-29 08:18

1.设计目的（1）、掌握信号发生器的设计方法和测试技术。（2）、了解单片函数发生器ICL8038的工作原理和应用，了解8038内部组成原理。用模拟器件模拟电路。（3）、学会安装和调试分立元件与集成电路组成的多级*电路小系统。2.设计技术指标与要求（1）、基本要求：A、电路能输出正弦波、方波和三角波等三种波形；B、输出信号的频率要求可调；C、拟定测试方案和设计步骤；D、根据性能指标，计算元件参数，选好元件，设计电路并画出电路图；E、测量输出信号的幅度和频率；F、写出设计性报告。（2）、扩展要求：输出信号的幅度和频率要求连续可调，幅度范围为0-5V，频率范围100Hz-10KHz。（3）、技术指标频率范围：100Hz-1KHz，1Kz-10KHz；输出电压：方波VP-P≤24V，三角波VP-P

我是怪咖 07-29 08:26

6V，正弦波VP-P

余孽゜ 07-29 08:34

1V；方波tr小于1uS。3.设计提示（1）、设计方案可先产生正弦波，然后通过整形电路将正弦波变成方波，再由积分电路将方波变成三角波；也可先产生三角波-方波，再将三角波变成正弦波。（2）、用单片集成芯片ICL8038实现，但这种方案要求幅度和频率都可调，可采用数字电位器加程控放大器实现。

被冷 07-29 08:43

该信号发生器的硬件结构如图1所示。硬件结构以AT89C52单片机为主控制器,包括DA转换模块、输出放大模块、*存储模块、液晶显示模块、时钟模块、电源监控模块及键盘等。系统工作原理:在开机时,主控制器AT89C52单片机*中断产生脉冲信号,其信号大小采用默认值,该值输出给DA转换模块后变为电流信号,然后通过输出放大模块输出用户需要的电压方波信号,同时,液晶显示模块动态显示方波信号的各种参数和时间*。用户通过键盘可在线修改系统运行参数,同时可保存当前设定值或查看历史运行*。为了提高系统的集成度和减小系统体积,采用CPLD可编程逻辑器件完成了系统外围电路的组合逻辑设计。从图1可以看出,CPLD是整个仪器的关键,他接受从单片机发来的控制指令,产生各个芯片的控制时序和地址信号。本设计中采用LATTICE公司的44脚ispLSI1016VE器件,他采用PLCC封装,内有1000个PLDGates,擦写次数超过10000次,是一种不需要特殊编程装置、使用极为方便的逻辑器件。通过VHDL语言编程实现了地址锁存器、译码器及其他组合逻辑。由于信号发生器需要时间*,选用了高性能的DS1302时钟芯片向系统提供时间*。考虑该信号发生器在不同时间各种设定参数长时间保存的要求,选用富士通公司的FLASH存储器MBM29F016用于保存历史*。容量为16Mb(2M×8b)的CMOS器件MBM29F016在线可擦写次数超过100000次,其48脚的TSOP封装有助于减小系统体积和提高抗干扰性。此外,由于在系统中单片机采用5V供电而DA转换器采用15V供电,所以采用了高性能的电源转换芯片MAX1776作电平转换;采用DS1233作电源监控以保证系统工作的可靠性。系统在初始化后,单片机将用户所需要生成波形的*送出,模数转换芯片DAC0832将单片机输出*转换为电流信号再通过运算放大器转化为电压信号,同时各种**被送给液晶显示器进行显示。通过按键*作菜单按特定的步长对参数进行加减。另外还设计了信号发生器与PC机的串行通讯接口RS232接口,以便日后对信号发生器的历史*进行分析和处理

念如初 07-29 08:51

方案设计1.信号源制作方案方案一：采用函数信号发生器ICL8038集成模拟芯片，它是一种可以同时产生方波、三角波、正弦波的专用集成电路。但是这种模块产生的波形都不是纯净的波形，会寄生一些高次谐波分量，采用其他的措施虽然可以滤除一些，但不能完全滤掉。而且频率也达不到要求。方案二：采用模拟分力元件或单片机压控函数发生器MAX038。它能够产生多种波形,如三角波、锯齿波、矩形波(含方波)、正弦波的电路。通过调整外部元件可以改变输出频率以符合要求，但采用模拟器件由于元件分散性太大，即使使用单片函数发生器，由于参数与外部元件有关，外接的电阻、电容对参数影响也很大，因而产生的频率稳定性较差、精度低、抗干扰能力低、成本也高;而且灵活性较差，不能实现任意波形的以及波形运算输出等智能的功能。

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