Constant-temperature crystal oscillator and rubidium clock combined taming device and method

Through the combined taming device of single-chip microcomputer, FPGA module, TDC module and rubidium atomic clock and constant temperature crystal oscillator, the problems of long warm-up time and serial taming mode of rubidium atomic clock are solved, and low-noise, high-stability clock output and clock hot backup are achieved.

CN120658255APending Publication Date: 2025-09-16CHENGDU JINNUOXIN HIGH-TECH CO LTD
0 Cites 1 Cited by

Patent Information

Application Number
CN202510770428.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-10
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

In the prior art, the training methods of oven-controlled crystal oscillators and rubidium clocks have the problem that the rubidium atomic clock has a long warm-up time and the training mode is serial, resulting in clock anomalies and being unable to be used as a parameter clock.

Method used

A joint training device consisting of a single-chip microcomputer, an FPGA module, a TDC module, a rubidium atomic clock and a constant temperature crystal oscillator is used. Through parallel training, the constant temperature crystal oscillator and the rubidium atomic clock are trained simultaneously using an external reference signal. After the rubidium atomic clock is preheated, the system switches to training the constant temperature crystal oscillator alone to achieve hot backup of the clock.

Benefits of technology

It achieves low-noise and high-stability clock output, quickly enters the taming state, avoids the serial taming mode, and has clock hot backup capability.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a constant-temperature crystal oscillator and rubidium clock combined taming device and method, and relates to the technical field of time frequency, and the device comprises a single-chip microcomputer, an FPGA module, a TDC module, a rubidium atomic clock and a constant-temperature crystal oscillator. The FPGA module is connected with the single-chip microcomputer, the TDC module, the rubidium atomic clock and the constant-temperature crystal oscillator, the FPGA module is used for receiving a reference 1PPS signal input from the outside, the single-chip microcomputer is connected with the constant-temperature crystal oscillator through the DAC module, the TDC module is connected with the single-chip microcomputer through an SPI bus, the TDC module is used for measuring the phase difference, and the single-chip microcomputer is used for adjusting the voltage control of the constant-temperature crystal oscillator or the frequency of the rubidium atomic clock; and the FPGA module communicates with the rubidium atomic clock through a UART serial port. The output frequency has the characteristics of a constant-temperature crystal oscillator and a rubidium atomic clock at the same time, and low noise and high stability are achieved; a taming state can be quickly entered to output an accurate clock without waiting for preheating of a rubidium clock during startup; a serial taming mode is avoided, parallel taming is adopted, and when one clock source is abnormal, clock hot backup can be achieved.
Need to check novelty before this filing date? Find Prior Art