Dynamic power/current allocation among groups of audio amplifiers and/or haptic drivers
AssigneeCirrus Logic, Inc.
InventorsTian Zhao, Jeffrey A. May
Life of this patent
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Abstract
An audio or haptic power output system manages and delivers power to multiple output transducers based on corresponding power or current limits that are adjusted dynamically according to measures of power or current that are required to generate power output signals from corresponding digital input values or signals. A power management subsystem controls electrical power or current consumed by power output stages that supply power to the transducers by comparing the measures of power or current required to generate the power output signals to the corresponding power or current limits, and limiting the power or current consumed by the individual power output stages measures of power or current exceeds the corresponding limits.
Claims37
An audio or haptic power output system that delivers a plurality of power output signals to corresponding output transducers, comprising:
- a plurality of power output stages that generate corresponding ones of the power output signals from a corresponding plurality of input values or signals;
- and
- at least one power management subsystem that controls electrical power or current consumed by the power output stages by comparing measures of a power or current required to generate the individual power output signals to corresponding power or current limits for the power output stages, and limiting the power or current consumed by the individual power output stages if the corresponding measures of the power or current exceed the corresponding power or current limits, wherein the corresponding power or current limits are adjusted dynamically in conformity with the measures of the power or current required to generate the individual power output signals.
A method of managing electrical power or current provided in a power output system that delivers a plurality of power output signals to corresponding haptic or audio output transducers from a plurality of power output stages, the method comprising:
- comparing measures of a power or current required to generate the individual power output signals to corresponding power or current limits for the power output stages;
- limiting the power or current consumed by the individual power output stages if the corresponding measures of the power or current exceed the corresponding power or current limits;
- generating the individual power output signals from corresponding ones of the plurality of input values or signals;
- and
- adjusting the individual power or current limits are dynamically in conformity with the measures of the power or current required to generate the individual power output signals.
A computer program product comprising program instructions stored in a computer-readable storage that is not a signal or propagating wave, wherein the computer program product, when executed by a processor, manages electrical power or current provided in a power output system that delivers a plurality of power output signals to corresponding haptic or audio output transducers from a plurality of power output stages, the program instructions comprising:
- program instructions for, responsive to samples of a plurality of input values corresponding to an power or current required to generate the individual power output signals, comparing the measures of the power or current to corresponding power or current limits for the power output stages;
- program instructions for, limiting the power or current consumed by the individual power output stages if the corresponding measures of the power or current exceed the corresponding power or current limits;
- and
- program instructions for adjusting the individual power or current limits dynamically in conformity with the measures of the power or current required to generate the individual power output signals.
Dependencies are inferred from the claim text.