Terminal having real time clock (RTC) operator and method of RTC operation using the same
US8102151B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2008 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Jun 11, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of operating a Real Time Clock (RTC) in a terminal is provided. The method includes detecting a clock signal transmitted to an RTC block when the main power supply is switched off, and supplying a power to the RTC block for its operation by charging and discharging the power periodically supplied from the backup battery according to the detected clock signal. A DC/DC converter connected to a backup battery is periodically switched on and off, and a capacitor is charged and discharged using the power of the backup battery, thereby avoiding supplying power from a backup battery continuously to an RTC block. Therefore, power consumption is reduced and a duration of time for maintaining RTC data is extended.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.