WO1995031029A3 - A method and apparatus for controlling power for subsystems - Google Patents

A method and apparatus for controlling power for subsystems Download PDF

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Publication number
WO1995031029A3
WO1995031029A3 PCT/US1995/005625 US9505625W WO9531029A3 WO 1995031029 A3 WO1995031029 A3 WO 1995031029A3 US 9505625 W US9505625 W US 9505625W WO 9531029 A3 WO9531029 A3 WO 9531029A3
Authority
WO
WIPO (PCT)
Prior art keywords
subsystem
operating system
controlling power
subsystems
application programs
Prior art date
Application number
PCT/US1995/005625
Other languages
French (fr)
Other versions
WO1995031029A2 (en
Inventor
David B Townsley
Original Assignee
Apple Computer
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 Apple Computer filed Critical Apple Computer
Priority to AU24713/95A priority Critical patent/AU2471395A/en
Publication of WO1995031029A2 publication Critical patent/WO1995031029A2/en
Publication of WO1995031029A3 publication Critical patent/WO1995031029A3/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
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
    • G06F1/3215—Monitoring of peripheral devices
    • 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
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/325—Power saving in peripheral device
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Power Sources (AREA)

Abstract

A method and apparatus for controlling power to a subsystem in a computer system where the subsystem is fully powered when used by application programs and where an operating system places the subsystem in a reduced power consumption state during idle periods. Application programs directly access the subsystem without going through the operating system. The operating system polls the subsystem and determines when the subsystem has not be accessed for a predefined time period, after which the operating system causes the subsystem to be powered down.
PCT/US1995/005625 1994-05-10 1995-05-08 A method and apparatus for controlling power for subsystems WO1995031029A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24713/95A AU2471395A (en) 1994-05-10 1995-05-08 A method and apparatus for controlling power for subsystems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24023894A 1994-05-10 1994-05-10
US08/240,238 1994-05-10

Publications (2)

Publication Number Publication Date
WO1995031029A2 WO1995031029A2 (en) 1995-11-16
WO1995031029A3 true WO1995031029A3 (en) 1996-03-07

Family

ID=22905728

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/005625 WO1995031029A2 (en) 1994-05-10 1995-05-08 A method and apparatus for controlling power for subsystems

Country Status (2)

Country Link
AU (1) AU2471395A (en)
WO (1) WO1995031029A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5768601A (en) * 1996-01-17 1998-06-16 Compaq Computer Corporation Apparatus for eliminating audio noise when power is cycled to a computer
US6167524A (en) * 1998-04-06 2000-12-26 International Business Machines Corporation Apparatus and method for efficient battery utilization in portable personal computers

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172458A (en) * 1985-03-13 1986-09-17 Sgs Microelettronica Spa Apparatus and method for muting an output signal in a switching amplifier
EP0364222A2 (en) * 1988-10-14 1990-04-18 Compaq Computer Corporation Apparatus for reducing computer system power consumption
WO1991000566A1 (en) * 1989-06-30 1991-01-10 Poqet Computer Corporation Computer power management system
GB2235797A (en) * 1989-09-08 1991-03-13 Apple Computer Power management for a portable computer
EP0430236A2 (en) * 1989-11-30 1991-06-05 Kabushiki Kaisha Toshiba Power amplifier
GB2256547A (en) * 1991-05-06 1992-12-09 Thomson Consumer Electronics Control system including a switching circuit for ensuring proper operation when operating power is removed from a portion of the control system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172458A (en) * 1985-03-13 1986-09-17 Sgs Microelettronica Spa Apparatus and method for muting an output signal in a switching amplifier
EP0364222A2 (en) * 1988-10-14 1990-04-18 Compaq Computer Corporation Apparatus for reducing computer system power consumption
WO1991000566A1 (en) * 1989-06-30 1991-01-10 Poqet Computer Corporation Computer power management system
GB2235797A (en) * 1989-09-08 1991-03-13 Apple Computer Power management for a portable computer
EP0430236A2 (en) * 1989-11-30 1991-06-05 Kabushiki Kaisha Toshiba Power amplifier
GB2256547A (en) * 1991-05-06 1992-12-09 Thomson Consumer Electronics Control system including a switching circuit for ensuring proper operation when operating power is removed from a portion of the control system

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
"Automatic disk power reduction for portable computer", IBM TECHNICAL DISCLOSURE BULLETIN, vol. 32, no. 4B, NY ,US, pages 60 - 61, XP000067074 *
"Making every watt count", COMPUTER DESIGN, no. 12, WESTFORD ,MA,US, pages 67-70 - 83-86, XP000425195 *
"technique for monitoring a computer system's activity for the purpose of power management of a DOS-compatible system", IBM TECHNICAL DISCLOSURE BULLETIN, vol. 33, no. 4, NY,US, pages 474 - 477, XP000106498 *
ERWIN HABERMAYR ,JÜRGEN HOFMEISTER: "Sparsame Familie 486-Prozessoren mit " Schlummerfähigkeit "", ELEKTRONIK, no. 7, 5 April 1994 (1994-04-05), MUNCHEN ,DE, pages 104 - 110, XP000443106 *
FRANK GOODENOUGH: "Dozing IC OP Amps Wake Up For Input Signal", ELECTRONIC DESIGN, no. 23, CLEVELAND ,OH,US, pages 49-50 - 52-54, XP000276235 *

Also Published As

Publication number Publication date
WO1995031029A2 (en) 1995-11-16
AU2471395A (en) 1995-11-29

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