期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2012
卷号：45
期号：2
页码：634-639
出版社：Journal of Theoretical and Applied
摘要：In the field of Test & Control Instrument , multi-channel signal sources are needed as the excitation in the electrical parameters measurement. This paper presents a realization method of multiplexed signal source which combined the advantages of DDS principle with high speed programmable logic device FPGA, fully reflect the characteristics of fast switching frequency, high precision with DDS technology, and abundant FPGA logic resources. This design realized the optimization of DDS resources primarily through FPGA, made use of timing multi-threaded design ROM shared access, innovated an adjustable amplitude method, namely, applied FPGA internal procedures to modulate the normalized waveform sampling digital.
