Patent ID: 11910171
Assignee: APPLE INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. A method of controlling a power supply voltage supplied to an audio amplifier, the method comprising:
identifying at least one of an increased or a decreased energy requirement in an upcoming portion of an audio signal;
responsive to an increased energy requirement in an upcoming portion of the audio signal, increasing a power supply voltage supplied to at least one audio amplifier and increasing a look ahead time period before the increased energy requirement at which the audio power supply controller identifies the increased energy requirement; and
responsive to a decreased energy requirement in an upcoming portion of the audio signal, decreasing the power supply voltage supplied to the at least one audio amplifier and decreasing a delay time period after the decreased energy requirement at which the audio power supply controller decreases the power supply voltage supplied to the at least one audio amplifier.