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一种基于DDS的幅值可调信号发生器的设计

International Electronic Elements(2008)

Cited 23|Views4
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Abstract
提出了一种基于DDS(Direct Digital Synthesize)AD9850的频率、相位、幅值均可调节的正弦信号发生器。该正弦信号发生器采用AT89S52单片机为控制器,D/A转换器TLC5615与乘法器AD534相结合,实现输出正弦信号幅值可控,采用AD811控制输出正弦信号电压幅值,产生50 Hz~3 kHz频段的正弦波,步进频率为50 Hz。该信号发生器可应用在交变磁场测量仪和试验仪器、工程设计的函数发生器中。
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Key words
analog multiplier,TLC5615,AD9850,MCU,direct digital synthesize(DDS)
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