Automatic time correction method for electronic device

Abstract

The invention discloses an automatic time correction method of electronic device, which comprises the following parts: time sampling unit, CPU, storage coupling the CPU and display unit, wherein the electronic device adapts the time sampling unit to obtain the standard time and compares the system time with the standard time to calculate the time error of electronic system time, which corrects the system time according to the correction period. The invention improves the time precision through common quartz oscillator, which overcomes the different influences of electronic element parameter to reduce the cost of electronic device.

Description

【Technical field】 [0001] The invention relates to an automatic time correction method, in particular to an automatic time correction method applied in an electronic device. 【Background technique】 [0002] With the development of communication technology, the popularity rate of electronic devices with clock function is increasing day by day, and the accuracy of the clock is becoming more and more important in the actual use of electronic devices. accuracy. The accuracy of the current clock mainly depends on the accuracy of the oscillator used in the clock circuit. At present, ordinary quartz oscillators are mostly used, and their frequency error is ±20-50ppm (20-50 parts per million), such as 20ppm For example, the time error generated every day will be 1.728 seconds, and the accumulated time error in one year will be 630.72 seconds, which will be as long as 10.5 minutes, so it will bring some inconvenience to the user. [0003] To solve this problem, the industry adopts tw...

AI Technical Summary

Problems solved by technology

The disadvantage of the first method is that even if a high-precision crystal oscillator is used, there is still a difference in the load capacitance of the oscillation circuit, so it is actually impossible to obtain the same high precision as a crystal oscillator. Impossible to get high accuracy time

The disadvantage of the second method is that although the cost of using a general quartz oscillator is not too high, it requires a frequency adjustment device, such as a trimmer capacitor, which causes an increase in component costs and a more cumbersome defect in the frequency adjustment process, especially It is the increase in the number of components that will hinder the miniaturization of electronic devices

At the same time, even if the electronic components are of the same type, their electrical parameters are different, so the errors caused are also different, so the above two methods cannot overcome this problem.

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