Design and Implementation of Time-Frequency Taming Algorithm of Rubidium Atomic Clock Based on FPGA

Synchronously improving the accuracy of time and frequency sources in electronic measurement systems can enhance measurement precision. Fully combining the good long-term stability of 1pps output from satellite navigation receiver and the good terminal stability of rubidium atomic clock, a frequency and time-locked algorithm based on second-order digital phase-locked loop is designed, which integrates frequency taming and time synchronization, and is implemented based on FPGA; The test results show that the algorithm can obtain a better accuracy 1PPS time signal while taming the frequency with good long-term stability external 1pps.