Power supplies
First Claim
Patent Images
1. An audio player comprising:
- an audio amplifier;
at least first and second supply voltages to energize the audio amplifier;
a controller to detect a volume for play of an audio track and determine an associated supply voltage such that, at any time, only one of the first and second supply voltages is selected to energize the audio amplifier in response to the detected volume, wherein the controller is to determine an associated supply voltage based on a configurable parameter to tune a transition point between the first and second supply voltages based on speaker impedance.
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Abstract
Techniques for providing multiple power supplies in electronic devices are disclosed. According to one aspect of the present invention, an appropriate power supply is provided only to accommodate a volume setting. In other words, there are at least two power supplies, one with a low voltage and the other with a high voltage. The high voltage power supply is only applied when there is a need to accommodate a volume setting. Thus the power consumption of the amplifiers is well controlled. As a result, the designs of the device and heat dissipation therein can be simplified and lowered in cost.
16 Citations
21 Claims
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1. An audio player comprising:
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an audio amplifier; at least first and second supply voltages to energize the audio amplifier; a controller to detect a volume for play of an audio track and determine an associated supply voltage such that, at any time, only one of the first and second supply voltages is selected to energize the audio amplifier in response to the detected volume, wherein the controller is to determine an associated supply voltage based on a configurable parameter to tune a transition point between the first and second supply voltages based on speaker impedance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A non-transitory tangible computer-readable storage medium including a set of instructions for execution by a processor, the set of instructions, when executed, to implement a method to control supply voltage provided to an amplifier in a playback device, the method comprising:
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detect a volume setting for play of an audio track by an electronic audio player; determine, using a controller, an associated supply voltage for play of the audio track based on the volume setting and available power supply voltages; and facilitate selection of one of a first supply voltage and a second supply voltage such that, at any time, only one of the first and second supply voltages is selected to energize an audio amplifier of the electronic audio player in response to the detected volume to play the audio track, wherein the controller is to determine an associated supply voltage based on a configurable parameter to tune a transition point between the first and second supply voltages based on speaker impedance. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification