Method and apparatus for controlling power supply of audio amplifier
US8410855B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2010 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Jun 14, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/511
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method of controlling power supply voltage of an audio amplifier delays an input audio signal; estimates, with a digital signal processor, an audio output level of the delayed input audio signal based on correlations between the delayed input audio signal level and audio level change factors; sets a value of power supply voltage supplied to a power switching circuit unit in correspondence with the estimated audio output level prior to outputting the delayed input audio signal on which the estimated audio output level is based; and amplifies the delayed audio input signal to provide an audio output signal by variably controlling the power supply voltage supplied to the power switching circuit unit according to the set value of power supply voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.