Design of Digital Frequency Source

This article uses the digital phase-lock frequency synthesis technical to design entire digital and high accuracy frequency source, this frequency source mainly uses the digital phase-locked loop and AT89C52 microcomputer.It´s output frequency is adjustable in the 0Hz~9999Hz scope smooth, the frequency source may the manual establishment output frequency, and has time the power failure or engine off´s frequency memory function, the frequency source may demonstrate this frequency during output frequency. The frequency source´s frequency value may also by the PC, the PC use the software of Kingview for long-distance monitoring frequency source .