Invention Grant
US08861749B2 Audio output driver for reducing electromagnetic interference and improving audio channel performance
有权
音频输出驱动器,用于减少电磁干扰,提高音频通道性能
- Patent Title: Audio output driver for reducing electromagnetic interference and improving audio channel performance
- Patent Title (中): 音频输出驱动器,用于减少电磁干扰,提高音频通道性能
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Application No.: US13114655Application Date: 2011-05-24
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Publication No.: US08861749B2Publication Date: 2014-10-14
- Inventor: Matthew D. Felder
- Applicant: Matthew D. Felder
- Applicant Address: US TX Austin
- Assignee: Sigmatel, Inc.
- Current Assignee: Sigmatel, Inc.
- Current Assignee Address: US TX Austin
- Agent Gary Stanford
- Main IPC: H03F21/00
- IPC: H03F21/00 ; H04H60/04 ; G06F3/16 ; G10L21/0208 ; H04B1/10

Abstract:
An audio output circuit includes an on-chip left channel amplifier module, an on-chip center channel amplifier module, and an on-chip right channel amplifier module. A left channel IC pin is operably coupled to an output of the on-chip left channel amplifier module. A right channel IC pin is operably coupled to an output of the on-chip right channel amplifier module. A center channel IC pin is operably coupled to an output of the on-chip center channel amplifier module. A center channel feedback IC pin is operably coupled to an input of the on-chip center channel amplifier module to provide a feedback loop. A left jack connection is operably coupled to the left channel IC pin. A right jack connection is operably coupled to the right channel IC pin. A jack return connection coupled to the center feedback IC pin. An inductor has a first node coupled to the jack return connection and a second node coupled to the center channel IC pin.
Public/Granted literature
- US20110222712A1 AUDIO OUTPUT DRIVER FOR REDUCING ELECTROMAGNETIC INTERFERENCE AND IMPROVING AUDIO CHANNEL PERFORMANCE Public/Granted day:2011-09-15
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