Method and apparatus for calibrating low frequency clock
US8872548B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2013 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Sep 24, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus for calibrating a low frequency clock are disclosed. The method includes: calculating a frequency of a low frequency clock in a current low frequency clock calibration; and calculating an average value of low frequency clock frequencies in n clock calibrations before the current calibration, where n is greater than 1 and is an integer; judging whether a difference between the frequency of the low frequency clock in the current low frequency clock calibration and the average value is smaller than a preset threshold for the difference; and if the difference between the frequency of the low frequency clock in the current low frequency clock calibration and the average value is smaller than the preset threshold for the difference, calculating the number of sleep cycles according to the calculated and obtained frequency of the low frequency clock in the current low frequency clock calibration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.