CAJ | 학술논문

本系统采用89C51单片机作为波形发生电路的核心控制器件，通过输出相应的高低电平输出方波波形，通过正比例函数关系拟合三角波形输出，通过编制正弦表实现正弦波形的输出，分别从相应端口实现数字量赋值，采用数模转换芯片DAC0832实现数字量向模拟量的转换，得到相应的模拟输出波形；利用按键调用不同的数字编码表控制不同波形的输出；通过调用不同的延时函数实现频率的调节；通过运放的调理实现幅度的调节；通过电平转换器实现从方波向TTL电平输出的转换．
본계통채용89C51단편궤작위파형발생전로적핵심공제기건，통과수출상응적고저전평수출방파파형，통과정비례함수관계의합삼각파형수출，통과편제정현표실현정현파형적수출，분별종상응단구실현수자량부치，채용수모전환심편DAC0832실현수자량향모의량적전환，득도상응적모의수출파형；이용안건조용불동적수자편마표공제불동파형적수출；통과조용불동적연시함수실현빈솔적조절；통과운방적조리실현폭도적조절；통과전평전환기실현종방파향TTL전평수출적전환．
In this system, 89C51microcontroller is a core controlling chip for waveform generator circuits. Square waveIbrms are transited when corresponding high and low electric, al levels are produced. Triangular square waveform outputs are fitted by using proportional function relationship. Sinusoida] tables are generated to produc, e sinusoidal waves. And digital values are assigned from corresponding port. Digital value is conversed to analog value through the use of analog chip DAC0832, which produces corresponding analog output wavefo~Tns. By switching the keys, different digital encoding tables can be used to control different waveform outputs. De/ay functions can adjust frequencies and the magnitude is controlled by adjusting operational amplifier circuits. Square waves are conversed to TTL electrical level output bv usint, an electrical lewl converser.