公开(公告)号：US09520782B2

公开(公告)日：2016-12-13

申请号：US14182798

申请日：2014-02-18

Applicant: Cirrus Logic, Inc.

Inventor： Ullas Pazhayaveetil ,  Jeffrey May ,  Anu Chakravarty ,  Gautham Kamath ,  John Tucker ,  Christian Larsen

IPC: H03G3/00 ,  H02M3/158 ,  G01R27/26 ,  G01R21/06 ,  G06F1/32

CPC classification number: H02M3/158 ,  G01R21/06 ,  G01R27/2611 ,  G06F1/3203 ,  H02M3/156 ,  H03F3/187 ,  H03F3/2175 ,  H03G3/004

Abstract: Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.

Abstract translation: 可以通过基于被放大的音频信号控制音频放大器来改善音频放大。 例如，当音频信号电平增加或减小时，升压转换器提供给音频放大器的升压电压也可以增加或减小。 在另一示例中，当音频信号电平降低到低于某一水平时，可以利用升压转换器输入将音频放大器切换成放大音频信号，以便以低电压输入放大音频信号。 可以在耦合到升压转换器和/或音频放大器的数字升压转换器控制器中实现音频放大器的控制。

公开(公告)号：US20150030183A1

公开(公告)日：2015-01-29

申请号：US14182798

申请日：2014-02-18

Applicant: CIRRUS LOGIC, INC.

Inventor： Ullas Pazhayaveetil ,  Jeffrey May ,  Anu Chakravarty ,  Gautham Kamath ,  John Tucker ,  Christian Larsen

IPC: H03G3/00

CPC classification number: H02M3/158 ,  G01R21/06 ,  G01R27/2611 ,  G06F1/3203 ,  H02M3/156 ,  H03F3/187 ,  H03F3/2175 ,  H03G3/004

Abstract: Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.

Abstract translation: 可以通过基于被放大的音频信号控制音频放大器来改善音频放大。 例如，当音频信号电平增加或减小时，升压转换器提供给音频放大器的升压电压也可以增加或减小。 在另一示例中，当音频信号电平降低到低于某一水平时，可以利用升压转换器输入将音频放大器切换成放大音频信号，以便以低电压输入放大音频信号。 可以在耦合到升压转换器和/或音频放大器的数字升压转换器控制器中实现音频放大器的控制。