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1.发明申请AUDIO ACCESSORY CIRCUITRY AND METHOD COMPATIBLE WITH BOTH MSFT MODE AND DIGITAL COMMUNICATION MODE 审中-公开音频附件电路和兼容两种MSFT模式和数字通信模式的方法公开(公告)号：US20170019733A1
公开(公告)日：2017-01-19
申请号：US15277579
申请日：2016-09-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ball Fan , Wenpang David Wang , Christopher Michael Graves
IPC: H04R3/00
CPC classification number: H04R3/007 , H04R1/1041 , H04R29/00
Abstract: An audio accessory key detection system (40) includes a host circuit (2-3) coupled to communicate via a microphone line (7) with an accessory circuit (3-3) in either a MSFT mode or a digital communication mode. Depletion mode transistors (44-1,2,3) in the accessory circuit are coupled between keys (15-1,2,3) of the accessory circuit, respectively. The depletion mode transistors are allowed to remain conductive for MSFT mode operation. For digital communications mode operation, the host circuit sends a command via the microphone line to a key detector and controller circuit (29A) in the accessory circuit. In response, a voltage is generated to turn the depletion mode transistors off so as to allow digital communications mode operation between the accessory circuit and the host circuit.
Abstract translation: 音频附件密钥检测系统（40）包括主机电路（2-3），其经由麦克风线路（7）与MSFT模式或数字通信模式中的附件电路（3-3）相连接。 附件电路中的耗尽模式晶体管（44-1,2,3）分别耦合在附件电路的键（15-1,2,3）之间。 耗尽型晶体管被允许保持导通，用于MSFT模式操作。 对于数字通信模式操作，主机电路通过麦克风线路发送命令到附件电路中的键检测器和控制器电路（29A）。 作为响应，产生电压以使耗尽型晶体管截止，从而允许附件电路和主机电路之间的数字通信模式操作。
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2.发明申请Audio Accessory Circuitry and Method Compatible With Both MSFT Mode and Digital Communication Mode 有权兼容MSFT模式和数字通信模式的音频附件电路和方法公开(公告)号：US20140254809A1
公开(公告)日：2014-09-11
申请号：US13787185
申请日：2013-03-06
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ball Fan , Wenpang David Wang , Christopher Michael Graves
IPC: H04R29/00
CPC classification number: H04R3/007 , H04R1/1041 , H04R29/00
Abstract: An audio accessory key detection system (40) includes a host circuit (2-3) coupled to communicate via a microphone line (7) with an accessory circuit (3-3) in either a MSFT mode or a digital communication mode. Depletion mode transistors (44-1,2,3) in the accessory circuit are coupled between keys (15-1,2,3) of the accessory circuit, respectively. The depletion mode transistors are allowed to remain conductive for MSFT mode operation. For digital communications mode operation, the host circuit sends a command via the microphone line to a key detector and controller circuit (29A) in the accessory circuit. In response, a voltage is generated to turn the depletion mode transistors off so as to allow digital communications mode operation between the accessory circuit and the host circuit.
Abstract translation: 音频附件密钥检测系统（40）包括主机电路（2-3），其经由麦克风线路（7）与MSFT模式或数字通信模式中的附件电路（3-3）相连接。 附件电路中的耗尽模式晶体管（44-1,2,3）分别耦合在附件电路的键（15-1,2,3）之间。 耗尽型晶体管被允许保持导通，用于MSFT模式操作。 对于数字通信模式操作，主机电路通过麦克风线路发送命令到附件电路中的键检测器和控制器电路（29A）。 作为响应，产生电压以使耗尽型晶体管截止，从而允许附件电路和主机电路之间的数字通信模式操作。
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3.发明授权Initial command to switch transistors disconnecting keys from microphone line 有权开关晶体管的初始命令，用于断开麦克风线上的键公开(公告)号：US09479882B2
公开(公告)日：2016-10-25
申请号：US13787185
申请日：2013-03-06
Applicant: Texas Instruments Incorporated
Inventor： Ball Fan , Wenpang David Wang , Christopher Michael Graves
CPC classification number: H04R3/007 , H04R1/1041 , H04R29/00
Abstract: An audio accessory key detection system (40) includes a host circuit (2-3) coupled to communicate via a microphone line (7) with an accessory circuit (3-3) in either a MSFT mode or a digital communication mode. Depletion mode transistors (44-1,2,3) in the accessory circuit are coupled between keys (15-1,2,3) of the accessory circuit, respectively. The depletion mode transistors are allowed to remain conductive for MSFT mode operation. For digital communications mode operation, the host circuit sends a command via the microphone line to a key detector and controller circuit (29A) in the accessory circuit. In response, a voltage is generated to turn the depletion mode transistors off so as to allow digital communications mode operation between the accessory circuit and the host circuit.
Abstract translation: 音频附件密钥检测系统（40）包括主机电路（2-3），其经由麦克风线路（7）与MSFT模式或数字通信模式中的附件电路（3-3）相连接。 附件电路中的耗尽模式晶体管（44-1,2,3）分别耦合在附件电路的键（15-1,2,3）之间。 耗尽型晶体管被允许保持导通，用于MSFT模式操作。 对于数字通信模式操作，主机电路通过麦克风线路发送命令到附件电路中的键检测器和控制器电路（29A）。 作为响应，产生电压以使耗尽型晶体管截止，从而允许附件电路和主机电路之间的数字通信模式操作。
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公开(公告)号：US10462564B2
公开(公告)日：2019-10-29
申请号：US15277579
申请日：2016-09-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ball Fan , Wenpang David Wang , Christopher Michael Graves
Abstract: An audio accessory key detection system (40) includes a host circuit (2-3) coupled to communicate via a microphone line (7) with an accessory circuit (3-3) in either a MSFT mode or a digital communication mode. Depletion mode transistors (44-1,2,3) in the accessory circuit are coupled between keys (15-1,2,3) of the accessory circuit, respectively. The depletion mode transistors are allowed to remain conductive for MSFT mode operation. For digital communications mode operation, the host circuit sends a command via the microphone line to a key detector and controller circuit (29A) in the accessory circuit. In response, a voltage is generated to turn the depletion mode transistors off so as to allow digital communications mode operation between the accessory circuit and the host circuit.
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