【摘要】 数字移相式信号发生器以单片机和FPGA为核心,用单片机来实现频率、相位的预置和步进,并完成正弦信号的频率和相位差显示。由于在设计中采用直接数字频率合成(DDS)技术,并用FPGA有效地扩展了输出波形的频率范围,实现了输出两路高精度相位差的正弦信号,使该系统性能稳定可靠。更多还原

【Abstract】 Abstract:Digital moving-phase signal generator designed based on SCM,FPGA.SCM is used for pre-placing frequency and phase,realizing frequency and phase displaying of signal.Making use of SCM and FPGA,it can generate two-way digital moving-phase signal.Because of used DDS in design,system is stable and liable.It is verified that phase instrument achieves basic demand and has high accuracy by experiment.更多还原