【摘要】 介绍了DDS(直接数字频率合成)技术及PLL(锁相环)频率合成技术的工作原理及特点,给出了现代电台设计中基于DDS的频率合成器的设计方案。采用DDS输出作为参考的PLL频率合成器非常适合用做现代电台的本振。更多还原

【Abstract】 Basing on the discussion of principle and characteristic of direct digital frequency synthesis(DDS) and phase-locked loop frequency synthesis(PLL),a design scheme of frequency synthesizer combining direct digital synthesis used for modern radio is given.PLL frequency synthesizer with DDS reference will adapt to local oscillator of modern radio.更多还原