Real-time power conservation and thermal management for computer

Details Real-time power conservation and thermal management for computer Real-time power conservation and thermal management for computer

1995-02-28

2000-12-05

Ray, Gopal C.

Electrical computers and digital processing systems: support

Computer power control

Power conservation

713320, 713501, G06F 132, G06F 120, G06F 104

Patent

active

061580120

ABSTRACT:
A real-time power conservation and thermal management apparatus and method for portable computers employs a monitor to determine whether a CPU may rest based upon a real-time sample of the CPU activity and temperature levels and to activate a hardware-selector to carry out the monitor's determination. If the monitor determines the CPU may rest, the hardware selector reduces CPU clock time; if the CPU is to be active, the hardware selector returns the CPU to its previous high speed clock level. Switching back into full operation from its rest state occurs without a user having to request it and without any delay in the operation of the computer while waiting for the computer to return to a "ready" state. Furthermore, the monitor adjusts the performance level of the computer to manage power conservation and thermal management in response to the real-time sampling of CPU activity and temperature. Such adjustments are accomplished within the CPU cycles and do not affect the user's perception of performance and do not affect any system application software executing on the computer.

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