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采用直接数字频率合成(DDS)芯片AD9850,设计了基于双单片机AT89S52的正弦信号源电路。该信号源能输出频率可调正弦信号、模拟幅度调制(AM)信号、二进制PSK信号和二进制ASK信号。
Using the direct digital frequency synthesizer (DDS) chip AD9850, a sinusoidal signal source circuit based on the dual single-chip AT89S52 is designed. The signal source can output a frequency-adjustable sinusoidal signal, an analog amplitude modulation (AM) signal, a binary PSK signal and a binary ASK signal.