WO2009044308A3 - Clock signal distribution circuit, mobile device and method for operating a clock signal distribution circuit - Google Patents

Clock signal distribution circuit, mobile device and method for operating a clock signal distribution circuit Download PDF

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Publication number
WO2009044308A3
WO2009044308A3 PCT/IB2008/053793 IB2008053793W WO2009044308A3 WO 2009044308 A3 WO2009044308 A3 WO 2009044308A3 IB 2008053793 W IB2008053793 W IB 2008053793W WO 2009044308 A3 WO2009044308 A3 WO 2009044308A3
Authority
WO
WIPO (PCT)
Prior art keywords
clock signal
distribution circuit
signal distribution
signal generator
clock
Prior art date
Application number
PCT/IB2008/053793
Other languages
French (fr)
Other versions
WO2009044308A2 (en
Inventor
Claus Pfeiffer
Ralf Burdenski
Markus Neumann
Original Assignee
St Nxp Wireless Holding Ag
Claus Pfeiffer
Ralf Burdenski
Markus Neumann
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by St Nxp Wireless Holding Ag, Claus Pfeiffer, Ralf Burdenski, Markus Neumann filed Critical St Nxp Wireless Holding Ag
Publication of WO2009044308A2 publication Critical patent/WO2009044308A2/en
Publication of WO2009044308A3 publication Critical patent/WO2009044308A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
    • G06F1/06—Clock generators producing several clock signals
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
    • G06F1/08—Clock generators with changeable or programmable clock frequency
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
    • G06F1/12—Synchronisation of different clock signals provided by a plurality of clock generators
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0287—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level changing the clock frequency of a controller in the equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/10—Details of telephonic subscriber devices including a GPS signal receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/52—Details of telephonic subscriber devices including functional features of a camera
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

A clock distribution circuit (1) comprises a plurality of clock signal paths configured to distribute a clock signal (21) to a plurality of clock outputs (9-11) of the clock distribution circuit (1), a first clock signal generator (2) configured to generate a first clock signal, and a second clock signal generator (3) configured to generate a second clock signal. The second clock signal generator (3) consumes significantly less energy than the first clock signal generator (2). The clock distribution circuit (1) further comprises selecting means (18) configured to select one of the first or second clock signal generators (2, 3) and switching means (4) configured to either connect the first clock signal generator (2) or the second clock signal generator (3) to the plurality of clock signal paths dependent on the clock signal generator (2, 3) selected by the selecting means (18).
PCT/IB2008/053793 2007-10-01 2008-09-18 Clock signal distribution circuit, mobile device and method for operating a clock signal distribution circuit WO2009044308A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07117596.2 2007-10-01
EP07117596 2007-10-01

Publications (2)

Publication Number Publication Date
WO2009044308A2 WO2009044308A2 (en) 2009-04-09
WO2009044308A3 true WO2009044308A3 (en) 2009-06-25

Family

ID=40469948

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/053793 WO2009044308A2 (en) 2007-10-01 2008-09-18 Clock signal distribution circuit, mobile device and method for operating a clock signal distribution circuit

Country Status (1)

Country Link
WO (1) WO2009044308A2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5099140A (en) * 1990-08-31 1992-03-24 Advanced Micro Devices, Inc. Synchronous clock source selector
WO2002063452A1 (en) * 2001-02-07 2002-08-15 Qualcomm Incorporated Method and apparatus for applying clock signals to the processor of mobile subscriber station to manage power consumption
US6614320B1 (en) * 2000-10-26 2003-09-02 Cypress Semiconductor Corporation System and method of providing a programmable clock architecture for an advanced microcontroller
US20030218480A1 (en) * 2002-04-05 2003-11-27 Indian St (Stmicroelectronics Pvt. Ltd.) Low power clock distribution scheme
US20050273637A1 (en) * 2004-06-04 2005-12-08 Paul Lu Method and system for generating clocks for standby mode operation in a mobile communication device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5099140A (en) * 1990-08-31 1992-03-24 Advanced Micro Devices, Inc. Synchronous clock source selector
US6614320B1 (en) * 2000-10-26 2003-09-02 Cypress Semiconductor Corporation System and method of providing a programmable clock architecture for an advanced microcontroller
WO2002063452A1 (en) * 2001-02-07 2002-08-15 Qualcomm Incorporated Method and apparatus for applying clock signals to the processor of mobile subscriber station to manage power consumption
US20030218480A1 (en) * 2002-04-05 2003-11-27 Indian St (Stmicroelectronics Pvt. Ltd.) Low power clock distribution scheme
US20050273637A1 (en) * 2004-06-04 2005-12-08 Paul Lu Method and system for generating clocks for standby mode operation in a mobile communication device

Also Published As

Publication number Publication date
WO2009044308A2 (en) 2009-04-09

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