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论文编号:ZD1231 论文字数:28393,页数:45 附原理图,外文翻译
摘要
本系统由单片机控制模块,D/A控制电压转换模块,键盘显示处理模块,波形发生单元电路模块及功率放大电路模块五个模块电路构成。通过键盘输入所需要输出的函数信号的频率送入单片机进行处理,同时送数码管进行显示。又单片机产生的控制信号,经由D/A转换器后产生控制电压,通过改变控制电压的幅值来控制波形发生单元模块所产生信号的频率,从而实现频率的可调。该系统具有如下特点:
⑴ 可同时输出同频率的正弦波,方波,三角波等波形;
⑵ 输出频率范围为20Hz—10KHz,且输出频率连续可调,分辨率为0.1Hz;
⑶ 输出波形幅度连续可调;
⑷ 负载电阻3Ω时,输出功率≥2W;
⑸ 自动扫描(步长0.1Hz,每步停留1秒);
⑹ 在20Hz—10KHz范围内,可输出任意固定的频率;
⑺ 数字显示,最小单位为0.1Hz.。
Abstract
This system consist of five modules , which are clip processor , D/A-controlled voltage convertible module , Key-displayed processing module , wave-generated unit circuit module, Inputting signal frequency provided to output function required into ⑶single-clip processor through the key. The signals were transferred to digital-code tube display. The control voltage turned out by single-clip processor produced by wave-generated unit module to change the amplification of control voltage, which realizes the adjustment of frequency. This system has several characters as follows:
⑴ Outputting sin-wave, square-wave and tringle-wave etc;
⑵ Output frequency varies from 20Hz to 10KHz, out frequency can be adjusted continuously and its resolution is 0.1Hz;
⑶ The amplification of output wave can be adjusted continuously;
⑷ The output power≥2W
⑸ Automatic scan(step is 0.1Hz,step is per step);
⑹ It can output solid frequency of random, from 20Hz to 10KHz;
⑺ Digital display, minimum unit is 0.1Hz.
目录
绪论·(3)
系统性能指标·(3)
方案设计及论证·(4)
应用系统硬件设计·(15)
硬件系统设计原则(15)
CUP的选择·(15)
MCS-51单片机复位电路的设计(16)
D/A转换器的选择(17)
DAC0832与MCS-51的接法·(20)
ICL8038的原理及应用(25)
功率放大器的设计(28)
键盘与显示电路的设计(29)
电源的设计(38)
应用系统软件设计·(42)
结素语(49)
参考文献