Invention Grant
US08344797B2 Systems and methods for offset cancellation method for DC-coupled audio drivers
有权
用于直流耦合音频驱动器的偏移消除方法的系统和方法
- Patent Title: Systems and methods for offset cancellation method for DC-coupled audio drivers
- Patent Title (中): 用于直流耦合音频驱动器的偏移消除方法的系统和方法
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Application No.: US12623202Application Date: 2009-11-20
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Publication No.: US08344797B2Publication Date: 2013-01-01
- Inventor: Lorenzo Crespi , Christian Larsen
- Applicant: Lorenzo Crespi , Christian Larsen
- Applicant Address: US CA Newport Beach
- Assignee: Conexant Systems, Inc.
- Current Assignee: Conexant Systems, Inc.
- Current Assignee Address: US CA Newport Beach
- Agency: Farjami & Farjami LLP
- Main IPC: H03F1/02
- IPC: H03F1/02
Abstract:
Direct current (DC) offset in and audio driver can cause a constant drain on power even when there is no sound. Furthermore it can cause an audible pop when the audio driver is enabled. A scaled replica output stage can be employed to perform DC offset cancellation offline during a sampling phase. Once DC offset cancellation is achieved, the audio driver uses a full scale output stage during the operation phase.
Public/Granted literature
- US20110123049A1 Systems and Methods for Offset Cancellation Method for DC-Coupled Audio Drivers Public/Granted day:2011-05-26
Information query
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