公开(公告)号：US20140334632A1

公开(公告)日：2014-11-13

申请号：US14301115

申请日：2014-06-10

Applicant: ST-ERICSSON INDIA PVT. LTD. ,  ST-ERICSSON SA

Inventor： SANJEEV RANGANATHAN ,  SHYAM SOMAYAJULA ,  SRINATH SRIDHARAN ,  LIONEL CIMAZ

IPC: H04R3/00 ,  G10K11/00

CPC classification number: H04R3/002 ,  G10K11/002 ,  H04R3/00 ,  H04R3/007

Abstract: Systems and methods for suppressing pop-up noise in an audio signal are disclosed. The system includes a driver circuit shared by a pin interface and a complementary pin interface. A control unit is coupled to the pin interface and the complementary pin interface. To activate the pin interface, the control unit is configured to first activate the driver output at the complementary pin interface. Once the complementary pin interface achieves a preset voltage, the driver output is switched to the pin interface by the control unit. In addition, the driver circuit can be calibrated for a DC offset on the complementary pin interface by re-using calibration data calculated at the pin interface. Further, DC correction signals can be provided from a pre-biasing circuit based on the calibration data of the driver circuit.

Abstract translation: 公开了用于抑制音频信号中的弹出噪声的系统和方法。 该系统包括由引脚接口和互补引脚接口共享的驱动器电路。 控制单元耦合到引脚接口和互补引脚接口。 要激活引脚接口，控制单元配置为首先在互补引脚接口处激活驱动器输出。 一旦互补引脚接口达到预设电压，驱动器输出就由控制单元切换到引脚接口。 此外，可以通过重新使用在引脚接口处计算出的校准数据，在互补引脚接口上校准驱动器电路的直流偏移。 此外，可以基于驱动器电路的校准数据从预偏置电路提供直流校正信号。