【摘要】 为了实现幅值在一定范围连续可调,频率范围在1～100kHz、频率步进达到1Hz以下的信号发生器的设计,采用了单片机和EDA相结合的技术。在使用EDA技术中,采用现场可编程门阵列FPGA,使用 MAX+PLUSⅡ10.0软件,基于VHDL语言和原理图相结合的形式,实现了直接数字频率合成(即DDS)控制技术。基于FPGA的高密度、高速度、现场可编程的能力实现的DDS控制电路,容易满足设计要求,并具有易于调试、修改方便、频率稳定性高等优点。由此组成的DDS与强大的数据处理功能的单片机相结合,可以方便、灵活和准确地实现正弦波、方波、和三角波信号发生器。更多还原

【Abstract】 To realize a signal device, frequency scope in 1 Hz to 100 kHz, frequency step 1 Hz hereinafter, the technologies both single chip and EDA were adopted. Adopting programmable logic device FPGA in EDA, MAXPLUS Ⅱ 10.0 software, based on VHDL and principle chart combining, direct digital synthesize(DDS) control circuit design was realized. With high density, high speed and strong field programmable ability, it has some advantages of adjusting easy, modify convenient and high dependability using EDA technique. So combining DUS technique and single chip can realize producing signal equipment in convenient, flexible and accurate.更多还原