AU2001251499A1 - Methods, systems, wireless terminals, and computer program products for calibrating an electronic clock using a base reference signal and a non-continuous calibration reference signal having greater accuracy than the base reference signal - Google Patents
Methods, systems, wireless terminals, and computer program products for calibrating an electronic clock using a base reference signal and a non-continuous calibration reference signal having greater accuracy than the base reference signalInfo
- Publication number
- AU2001251499A1 AU2001251499A1 AU2001251499A AU5149901A AU2001251499A1 AU 2001251499 A1 AU2001251499 A1 AU 2001251499A1 AU 2001251499 A AU2001251499 A AU 2001251499A AU 5149901 A AU5149901 A AU 5149901A AU 2001251499 A1 AU2001251499 A1 AU 2001251499A1
- Authority
- AU
- Australia
- Prior art keywords
- reference signal
- base reference
- frequency
- electronic clock
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G3/00—Producing timing pulses
- G04G3/02—Circuits for deriving low frequency timing pulses from pulses of higher frequency
Abstract
Electronic clock calibration systems, methods, and computer program products use a calibration reference signal to calibrate an electronic clock that generates an output signal and that is responsive to a base reference signal. The base reference signal is less accurate than the calibration reference signal and, therefore, has an actual frequency and an ideal frequency associated therewith. The difference between the actual frequency and the ideal frequency represents the inaccuracy of the base reference signal. The calibration reference signal may be used to determine this difference between the actual frequency and ideal frequency of the base reference signal. Once this difference is determined, the frequency of the electronic clock output signal may be adjusted to compensate for the inaccuracy of the base reference signal. The base reference signal is often generated by a crystal oscillator circuit in consumer electronic devices, which is susceptible to frequency drift based on age, temperature, shock, and other environmental factors. Crystal oscillator circuits have an advantage in that they use relatively little power and, thus, tend to preserve battery life. The accuracy of a crystal oscillator circuit may be improved through use of a more accurate calibration reference signal that need not be available continuously.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/571,461 US6545950B1 (en) | 2000-05-16 | 2000-05-16 | Methods, systems, wireless terminals, and computer program products for calibrating an electronic clock using a base reference signal and a non-continuous calibration reference signal having greater accuracy than the base reference signal |
| US09571461 | 2000-05-16 | ||
| PCT/US2001/011616 WO2001088635A2 (en) | 2000-05-16 | 2001-04-10 | Methods, systems, wireless terminals, and computer program products for calibrating an electronic clock using a base reference signal and a non-continuous calibration reference signal having greater accuracy than the base reference signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2001251499A1 true AU2001251499A1 (en) | 2001-11-26 |
Family
ID=24283801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2001251499A Abandoned AU2001251499A1 (en) | 2000-05-16 | 2001-04-10 | Methods, systems, wireless terminals, and computer program products for calibrating an electronic clock using a base reference signal and a non-continuous calibration reference signal having greater accuracy than the base reference signal |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6545950B1 (en) |
| EP (1) | EP1287408B1 (en) |
| CN (1) | CN1211716C (en) |
| AT (1) | ATE438890T1 (en) |
| AU (1) | AU2001251499A1 (en) |
| DE (1) | DE60139472D1 (en) |
| WO (1) | WO2001088635A2 (en) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000063750A1 (en) * | 1999-04-19 | 2000-10-26 | Seiko Instruments Inc. | Sensor clock, data input system of sensor clock, data input method of sensor clock and computer-readable recording medium in which program for making computer execute the method is recorded |
| DE10024702A1 (en) * | 2000-05-18 | 2001-11-22 | Bosch Gmbh Robert | Fuel injector for storage injection system includes bypass channel injecting into outlet path at valve chamber |
| US6772361B1 (en) * | 2000-07-10 | 2004-08-03 | Advanced Micro Devices, Inc. | Real time clock (RTC) having several highly desirable timekeeping dependability and security attributes, and methods for accessing a register thereof |
| US7342681B2 (en) * | 2001-07-13 | 2008-03-11 | Transpacific Ip, Ltd | High-speed calibration method and system for an image-capture apparatus |
| US7302592B2 (en) | 2002-12-02 | 2007-11-27 | Silverbrook Research Pty Ltd | Integrated circuit which disables writing circuitry to memory when the power drops below a power threshold predetermined and controlled by the processor |
| FR2853093B1 (en) * | 2003-03-25 | 2005-09-30 | SYSTEM FOR COMPENSATING DERIVATIVES OF A CLOCK FOR A MOTOR VEHICLE | |
| JP4264494B2 (en) * | 2003-05-15 | 2009-05-20 | Ｏｋｉセミコンダクタ株式会社 | Standard radio wave reception time device |
| US6826123B1 (en) * | 2003-10-14 | 2004-11-30 | International Business Machines Corporation | Global recovery for time of day synchronization |
| US20050259722A1 (en) * | 2004-05-21 | 2005-11-24 | Reginald Vanlonden | Wireless clock system |
| US20060045215A1 (en) * | 2004-08-31 | 2006-03-02 | Motorola, Inc. | Method and apparatus for frequency correcting a periodic signal |
| US7398411B2 (en) * | 2005-05-12 | 2008-07-08 | Schweitzer Engineering Laboratories, Inc. | Self-calibrating time code generator |
| US8014476B2 (en) | 2005-11-07 | 2011-09-06 | Qualcomm, Incorporated | Wireless device with a non-compensated crystal oscillator |
| GB2432432B (en) * | 2005-11-16 | 2009-04-15 | Polymeters Response Internat L | Timekeeping apparatus |
| US7455447B2 (en) * | 2006-05-19 | 2008-11-25 | Mediatek Inc. | Method and apparatus for a portable device |
| CN1870479B (en) * | 2006-06-12 | 2010-08-04 | 华为技术有限公司 | System and method for implementing rubidium clock aging compensation |
| JP5114218B2 (en) * | 2008-01-10 | 2013-01-09 | ラピスセミコンダクタ株式会社 | Frequency correction circuit and clock device using the same |
| CN102084314B (en) * | 2008-07-03 | 2013-11-06 | 伊姆西斯有限公司 | Electronic timer system including look-up table based synchronization |
| US20090129208A1 (en) * | 2009-01-28 | 2009-05-21 | Weiss Kenneth P | Apparatus, system and method for keeping time |
| US8706073B2 (en) | 2009-06-16 | 2014-04-22 | Blackberry Limited | System and method for dynamic adjustment of clock calibration |
| CN102185561A (en) * | 2011-01-26 | 2011-09-14 | 意法·爱立信半导体（北京）有限公司 | Frequency deviation adjusting method and frequency deviation adjusting device used during startup of terminal |
| US8924765B2 (en) | 2011-07-03 | 2014-12-30 | Ambiq Micro, Inc. | Method and apparatus for low jitter distributed clock calibration |
| EP2741442A1 (en) * | 2012-12-07 | 2014-06-11 | Dialog Semiconductor B.V. | Automatic clock calibration of a remote unit using phase drift |
| US10936004B2 (en) * | 2017-09-28 | 2021-03-02 | Microchip Technology Incorporated | Temperature compensated clock frequency monitor |
| CN111830892B (en) * | 2019-04-22 | 2022-09-23 | 新疆金风科技股份有限公司 | Wind generating set statistical time calibration method and device and storage medium |
| CN111934678B (en) * | 2020-09-28 | 2021-01-05 | 深圳英集芯科技有限公司 | Method for automatically calibrating clock frequency in chip and related product |
| CN112269424A (en) * | 2020-11-19 | 2021-01-26 | 珠海零边界集成电路有限公司 | Chip clock frequency calibration method, device, equipment and medium |
| CN116880430B (en) * | 2023-09-08 | 2023-11-28 | 东晶电子金华有限公司 | Control method and system for fine tuning alignment of full-automatic resonator |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4074514A (en) | 1972-08-24 | 1978-02-21 | Dynacore, S.A. | Isochronous period generator having means for adjusting the isochronous period |
| CH643106B (en) | 1980-11-26 | Suisse Horlogerie | TIME-GUARD INCLUDING A CHAIN OF DIVIDERS WITH ADJUSTABLE DIVISION RATIO. | |
| CH664868GA3 (en) | 1986-07-10 | 1988-04-15 | ||
| US5327404A (en) * | 1990-11-27 | 1994-07-05 | Vlsi Technology, Inc. | On-chip frequency trimming method for real-time clock |
| JP3180494B2 (en) * | 1992-04-17 | 2001-06-25 | セイコーエプソン株式会社 | Logic device |
| FI95980C (en) | 1992-09-04 | 1996-04-10 | Nokia Mobile Phones Ltd | Method and switchgear for accurate measurement of time with an inaccurate clock |
| JPH07154243A (en) * | 1993-11-29 | 1995-06-16 | Mitsubishi Electric Corp | Electronic clock device and method and device for correction value decision device |
| US5717661A (en) * | 1994-12-20 | 1998-02-10 | Poulson; T. Earl | Method and apparatus for adjusting the accuracy of electronic timepieces |
| GB2297854B (en) * | 1995-02-07 | 1999-04-07 | Nokia Mobile Phones Ltd | Real time clock |
| JPH09113654A (en) | 1995-10-16 | 1997-05-02 | Nec Ic Microcomput Syst Ltd | Intermittent receiver controller |
| US5644271A (en) * | 1996-03-05 | 1997-07-01 | Mehta Tech, Inc. | Temperature compensated clock |
-
2000
- 2000-05-16 US US09/571,461 patent/US6545950B1/en not_active Expired - Lifetime
-
2001
- 2001-04-10 DE DE60139472T patent/DE60139472D1/en not_active Expired - Lifetime
- 2001-04-10 CN CNB018095496A patent/CN1211716C/en not_active Expired - Fee Related
- 2001-04-10 AT AT01924887T patent/ATE438890T1/en not_active IP Right Cessation
- 2001-04-10 AU AU2001251499A patent/AU2001251499A1/en not_active Abandoned
- 2001-04-10 WO PCT/US2001/011616 patent/WO2001088635A2/en active Application Filing
- 2001-04-10 EP EP01924887A patent/EP1287408B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ATE438890T1 (en) | 2009-08-15 |
| WO2001088635A2 (en) | 2001-11-22 |
| US6545950B1 (en) | 2003-04-08 |
| CN1211716C (en) | 2005-07-20 |
| EP1287408A2 (en) | 2003-03-05 |
| WO2001088635A3 (en) | 2002-06-13 |
| EP1287408B1 (en) | 2009-08-05 |
| DE60139472D1 (en) | 2009-09-17 |
| CN1441925A (en) | 2003-09-10 |
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