Circuit for detecting a cooling device in a computer system
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01R-031/28
G06F-001/30
출원번호
US-0766481
(2001-01-19)
발명자
/ 주소
Schell, J. David
Ricks, Joe A.
Guerrero, Jr., Edward C.
출원인 / 주소
Advanced Micro Devices, Inc.
대리인 / 주소
Kowert, Robert C.Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
인용정보
피인용 횟수 :
5인용 특허 :
8
초록▼
A cooling device detection circuit and method for detecting a cooling device in a computer system. In one embodiment, a cooling device detection circuit includes a detection stage and a power management stage. The detection stage is configured to sense an indication that the cooling device is functi
A cooling device detection circuit and method for detecting a cooling device in a computer system. In one embodiment, a cooling device detection circuit includes a detection stage and a power management stage. The detection stage is configured to sense an indication that the cooling device is functioning and to assert a signal if the cooling device is detected. The power management stage is configured to turn off a component cooled by the cooling device if the cooling device is not detected.
대표청구항▼
A cooling device detection circuit and method for detecting a cooling device in a computer system. In one embodiment, a cooling device detection circuit includes a detection stage and a power management stage. The detection stage is configured to sense an indication that the cooling device is functi
A cooling device detection circuit and method for detecting a cooling device in a computer system. In one embodiment, a cooling device detection circuit includes a detection stage and a power management stage. The detection stage is configured to sense an indication that the cooling device is functioning and to assert a signal if the cooling device is detected. The power management stage is configured to turn off a component cooled by the cooling device if the cooling device is not detected. nsor which is sensitive to magnetic fields which spatially vary around said axis of rotation in a cyclic manner and with an angular frequency of M; and (b) a second sensor which is sensitive to magnetic fields which spatially vary around said axis of rotation in a cyclic manner and with an angular frequency of N; whereby, in response to a magnetic field being generated by said first and second magnetic field generators, first and second signals are generated by said first and second sensors respectively, which signals vary with the relative angular position of said first and second members; and means for determining the relative angular position of said first and second members from said first and second signals. 2. A detector according to claim 1, wherein the circumferential spacing between said loop portions is arranged so as to reduce the amount of the harmonic components generated by said second magnetic field generator which have an angular frequency of M±1. 3. A detector according to claim 1, wherein the circumferential spacing between said loop portions is arranged so as to try to eliminate the harmonic components generated by said second magnetic field generator which have an angular frequency of M±1. 4. A detector according to claim 1, wherein the circumferential spacing between said loop portions is arranged so as to try to eliminate the harmonic components generated by said second magnetic field generator which have an angular frequency of M±2. 5. A detector according to claim 1, wherein said second magnetic field generator is operable to generate said magnetic field by passing a current through said winding. 6. A detector according to claim 5, wherein said second magnetic field generator further comprises a power source for generating said current. 7. A detector according to claim 1, wherein said first magnetic field generator comprises a winding which is wound around said axis of rotation and which has a plurality of loop portions circumferentially spaced around said axis of rotation, for generating a magnetic field which spatially varies around said axis of rotation in a cyclic manner and which comprises a fundamental component with an angular frequency of M and some harmonic components thereof. 8. A detector according to claim 7, wherein said first magnetic field generator is operable to generate said magnetic field by passing a current through said winding. 9. A detector according to claim 8, wherein said first magnetic field generator further comprises a power source for generating said current. 10. A detector according to claim 7, wherein the ends of each winding are connected together through a respective capacitor, so that each magnetic field generator comprises a respective resonator. 11. A detector according to claim 10, wherein the resonant frequency the first magnetic field generator is different to the resonant frequency of the second magnetic field generator. 12. A detector according to claim 11, wherein the resonant frequency of said first magnetic field generator is lower than the resonant frequency of the second magnetic field generator. 13. A detector according to claim 7, wherein the winding of said first magnetic field generator is electrically connected to the winding of said second magnetic field generator. 14. A detector according to claim 13, wherein adjacent loops of said second magnetic field generator are electrically connected through the loops of the first magnetic field generator and vice versa. 15. A detector according to claim 13, wherein the ends of said windings are connected together through a capacitor, to form a resonator. 16. A detector according to claim 13, wherein the ends of said windings are connected together to form a short circuit coil. 17. A detector according to claim 15, further comprising means for energising said short circuit coil or said resonator to cause said current to flow through said winding. 18. A detector according to claim 17, wherein said sec ond member comprises said energising means. 19. A detector according to claim 18, wherein said energising means comprises a winding which is circumferentially wound around said axis of rotation. 20. A detector according to claim 7, wherein said windings are located on but electrically separate from each other. 21. A detector according to claim 7, wherein said windings are formed from at least two layers of conductor tracks which are connected together at a plurality of vias which pass through an insulating layer disposed between said at least two layers of conductor tracks. 22. A detector according to claim 21, wherein said windings are formed from conductor tracks on at least two layers of a printed circuit board. 23. A detector according to claim 7, wherein said loop portions of said windings lie in one or more planes which are substantially parallel to said axis of rotation. 24. A detector according to claim 7, wherein said loop portions of said first magnetic field generator are symmetrically spaced around said axis of rotation. 25. A detector according to claim 24, wherein each of said loop portions of said first magnetic field generator comprises a multi turn spiral conductor. 26. A detector according to claim 24, wherein each of said loop portions of said first magnetic field generator have substantially the same form. 27. A detector according to claim 7, wherein the loop portions of said first magnetic field generator are wound in the same sense. 28. A detector according to any of claim 7, wherein said first magnetic field generator comprises M loop portions. 29. A detector according to claim 1, wherein said loop portions of said second magnetic field generator enclose different areas. 30. A detector according to claim 1, wherein each loop portion comprises at least two substantially radial portions. 31. A detector according to claim 17, wherein the spacings between the substantially radial portions of the loops of said second magnetic field generator are not the same. 32. A detector according to claim 1, wherein at least one loop portion of said second magnetic field generator is wound in the opposite sense to the other loop portions of said second magnetic field generator. 33. A detector according to claim 1, wherein said second magnetic field generator is operable to generate a harmonic component which spatially varies around said axis of rotation with an angular frequency of M. 34. A detector according to claim 1, wherein said second magnetic field generator comprises M loop portions. 35. A detector according to claim 1, wherein said first sensor comprises a winding which is wound around said axis of rotation and which has a plurality of loop portions circumferentially spaced around said axis of rotation so as to be sensitive to a magnetic field which spatially varies around said axis of rotation in a cyclic manner with an angular frequency of M. 36. A detector according to claim 35, wherein said first sensor further comprises a second winding which is wound around said axis of rotation and which has a plurality of loop portions circumferentially spaced around said axis of rotation so as to be sensitive to a magnetic field which spatially varies around said axis of rotation in a cyclic manner with an angular frequency of M; wherein the loop portions of the respective windings are circumferentially spaced apart; wherein said first sensor is operable to generate two signals in response to said first magnetic field generator generating a magnetic field, one from each of said first sensor windings; and wherein said determining means is operable to determine a fine position measurement from said two signals from said first sensor. 37. A detector according to claim 36, wherein the circumferential spacing between the two windings of said first sensor is π/2M or an integer multiple thereof, so that said two signals are in phase quadrature. 38. A detector according to claim 36, wherein said determining means is oper
Baudry Jean-Jerome C. (567 Avenue Road ; Apartment N102 Toronto ; Ontario CAX M4V 2K1 ), System to monitor the temperature of an integrated circuit and to dissipate heat generated thereby.
Osecky, Benjamin D.; Gaither, Blaine D., Method and apparatus for providing continued operation of a multiprocessor computer system after detecting impairment of a processor cooling device.
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