【摘要】 介绍一种基于DDS软件算法的精密低频三相数字信号源。信号源硬件是以C8051F005单片机为核心,通过软件编程模拟DDS专用器件的功能,并辅以DAC7512 D/A转换器产生幅值、频率可变,且相位差为120°的三相交流信号,最后采用功率放大器TDA7294提升信号源的输出功率和电压幅度。更多还原

【Abstract】 A design of the low frequency,high accuracy three-phase digital signal source based on DDS is introduced.This signal source can produce three-phase sine AC signal by using C8051F005 single chip as the core and using DAC7512 as the other chip to output the different amplitude,frequency sine signal with 120° phase difference by the method of software.At last,the voltage & power is amplified by high power operational amplifier.更多还原