摘要
介绍一种基于8051F单片机的数字音频信号源,利用单片机用DDS算法产生音频信号,通过数字电阻衰减器控制音频信号幅度,在0～100dB的幅度范围内实现1dB的步进值,系统计算机接口实现了集中多路衰减量的控制。
A kind of digital audio signal source based on C8051F is introduced in this paper.Audio signal is produced with DDS algorithm by using C8051F330 and the audio signal amplitude is controlled with digital resistance attenuator.The audio signal amplitude stepping change value is ldB in 0-100 dB amplitude range,Lumped multi-channel attenuation control is implemented using computer interface.
出处
《国外电子元器件》
2008年第9期35-36,39,共3页
International Electronic Elements
