无线电工程
無線電工程
무선전공정
Radio Engineering
2015年
11期
33-36
,共4页
实时钟%高精度%秒脉冲%相位%修正策略
實時鐘%高精度%秒脈遲%相位%脩正策略
실시종%고정도%초맥충%상위%수정책략
real-time clock%high accuracy%second pulse%phase%strategy of adjustment
实时钟电路一般由晶体振荡电路产生时钟计时信号, 由于电路、 晶体以及相关元器件老化等原因会导致晶体振荡电路的频率逐渐发生漂移, 进而导致电路计时产生偏差. 针对上述问题, 研究并完成了一种实时钟电路在正常使用中进行自我检测并修正的方法. 该方法可以检测实时钟电路输出秒脉冲和标准秒脉冲之间的频率及相位关系, 并根据检测结果对晶体振荡电路进行调整. 介绍了该方法的原理和实现方案, 并通过实际测试验证了该方法的可行性和先进性. 该方法已经在批量生产的实时钟电路中成功应用, 修正效果显著, 可有效减少产品后期维护的时间和成本.
實時鐘電路一般由晶體振盪電路產生時鐘計時信號, 由于電路、 晶體以及相關元器件老化等原因會導緻晶體振盪電路的頻率逐漸髮生漂移, 進而導緻電路計時產生偏差. 針對上述問題, 研究併完成瞭一種實時鐘電路在正常使用中進行自我檢測併脩正的方法. 該方法可以檢測實時鐘電路輸齣秒脈遲和標準秒脈遲之間的頻率及相位關繫, 併根據檢測結果對晶體振盪電路進行調整. 介紹瞭該方法的原理和實現方案, 併通過實際測試驗證瞭該方法的可行性和先進性. 該方法已經在批量生產的實時鐘電路中成功應用, 脩正效果顯著, 可有效減少產品後期維護的時間和成本.
실시종전로일반유정체진탕전로산생시종계시신호, 유우전로、 정체이급상관원기건노화등원인회도치정체진탕전로적빈솔축점발생표이, 진이도치전로계시산생편차. 침대상술문제, 연구병완성료일충실시종전로재정상사용중진행자아검측병수정적방법. 해방법가이검측실시종전로수출초맥충화표준초맥충지간적빈솔급상위관계, 병근거검측결과대정체진탕전로진행조정. 개소료해방법적원리화실현방안, 병통과실제측시험증료해방법적가행성화선진성. 해방법이경재비량생산적실시종전로중성공응용, 수정효과현저, 가유효감소산품후기유호적시간화성본.
The real-time clock circuit generally consists of a crystal oscillator circuit that generates a clock timing signal. Due to aging of the circuit,crystal and related components and other reasons,the frequency of the crystal oscillator circuit drifts gradually,lead-ing to circuit timing deviations.To solve these problems,a self-detect and correction method for real-time clock circuit in normal use is implemented.This method can detect the frequency and phase relationship between the second pulse generated by real-time clock circuit and the standard second pulse,and make adjustments to the crystal oscillator circuit according to test results. The principle and imple-mentation of the method are introduced, and feasibility and advancement of the method are verified by test. This method has been successfully applied in the production of real-time clock circuit, producing significant adjustment effect. The method can effectively reduce the time and cost of ongoing maintenance of products.
