【摘要】 本文介绍一种以AS7008为核心的正弦波信号发生器。正弦信号的频率和幅度通过单片机来定。AD7008的输出信号通过一个由MAX262构成的程控带通滤波器进行滤波处理,程控滤波器的中心率f0和Q值由单片机根据正弦信号的频率来设定。DDS是近几年发展起来的新型频率合成技术,具有为广阔的应用前景。更多还原

【Abstract】 A kind of sine-wave signal generator based on AD7008 is introduced in this paper. We can set the frequency and amplitude of sine-wave signal through single-chip processor.The output signal of AD7008 is filtered by a program controlled band-pass filter based on MAX262,the center frequency and Q of this filter are determined by the frequency of sine-wave through single-chip processor. DDS is a new frequency-synthesis technology developed in recent years,it has a bright prospect.更多还原