Invention Grant
US09362689B2 System and method for detecting the ground and microphone input contacts in an audio plug
有权
用于检测音频插头中接地和麦克风输入触点的系统和方法
- Patent Title: System and method for detecting the ground and microphone input contacts in an audio plug
- Patent Title (中): 用于检测音频插头中接地和麦克风输入触点的系统和方法
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Application No.: US13938788Application Date: 2013-07-10
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Publication No.: US09362689B2Publication Date: 2016-06-07
- Inventor: Chi Wah Lo , Hwai Sian Tsai , Ka Leong Tony Tsang
- Applicant: Chi Wah Lo , Hwai Sian Tsai , Ka Leong Tony Tsang
- Applicant Address: HK Hong Kong
- Assignee: BBPOS LIMITED
- Current Assignee: BBPOS LIMITED
- Current Assignee Address: HK Hong Kong
- Agency: Howison & Arnott, LLP
- Main IPC: H04R9/06
- IPC: H04R9/06 ; H01R13/703 ; H04R5/04 ; H04R1/10 ; H01R24/58 ; H01R107/00
Abstract:
A circuit for detecting the position of the signal MIC-IN and GND on the audio plug of a mobile phone includes two comparators and two switches. The comparators compare the voltage difference between the two contact points representing MIC-IN and GND of the audio plug of a mobile phone, and through this comparison the ground signal of the mobile phone is identified. The circuit then connects the ground of the accessory and the mobile phone properly, by activating the appropriate switch.
Public/Granted literature
- US20140017955A1 SYSTEM AND METHOD FOR DETECTING THE GROUND AND MICROPHONE INPUT CONTACTS IN AN AUDIO PLUG Public/Granted day:2014-01-16
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