System and method for reduction of information handling system power state transition of audible noise
First Claim
1. An information handling system comprising:
- a central processing unit;
a power source operable to power the central processing unit at plural power settings;
a power manager interfaced with the central processing unit and the power source, the power manager operable to adjust the power setting of the central processing unit at periodic intervals; and
an audible noise reduction module interfaced with the power manager and operable to alter the periodic interval to adjust the power setting at irregular intervals.
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Abstract
Audible noise related to power state transitions of an information handling system processing component, such as the central processing unit, is reduced by randomizing the time between power state transitions. Random power state transitions are managed by an operating system module that tracks the transitions and selects random times for subsequent transitions within a predetermined time range. Alternatively, an arbitrating circuit intercepts power state transition commands and arbitrates their communication at random times. Random power state transitions reduces audible noise by spreading the frequency of the noise-causing power transition events over a wider band.
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Citations
20 Claims
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1. An information handling system comprising:
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a central processing unit;
a power source operable to power the central processing unit at plural power settings;
a power manager interfaced with the central processing unit and the power source, the power manager operable to adjust the power setting of the central processing unit at periodic intervals; and
an audible noise reduction module interfaced with the power manager and operable to alter the periodic interval to adjust the power setting at irregular intervals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for reducing audible noise associated with power state transitions of an information handling system processing component, the method comprising:
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initiating a first power state transition;
determining a random time, the random time within predetermined range; and
initiating a second power state transition at the random time. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A system for reducing audible noise associated with power state transitions of an information handling system processing component, the system comprising:
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a power manager operable to transition the processing component between plural power states over an operating time; and
an audible noise reduction module interfaced with the power manager and operable to randomize the time between the transitions of the processing component to the power states. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification