驱动时钟加入了PLL,使得DDS的驱动时钟可变.32位的NCO使得DDS的分辨率可以做到Hz量级-Clock driver joined the PLL, the DDS makes the clock-driven variable-.32-bit NCO makes the resolution of DDS can be done Hz magnitude

数字锁相环频率合成器的设计,鉴相器、环路滤波器、数控振荡器、反馈分频器-Digital PLL frequency synthesizer, phase detector, loop filter, NCO, feedback divider