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    Audio Accessory Circuitry and Method Compatible With Both MSFT Mode and Digital Communication Mode
    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。

    Operating a headset that includes microphone line and pushbutton keys
    3.
    发明授权
    Operating a headset that includes microphone line and pushbutton keys 有权

    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

    IPC: H04R3/00 ,  H04R29/00 ,  H04R1/10

    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.

    High voltage level shifter with short propagation delay
    4.
    发明授权
    High voltage level shifter with short propagation delay 有权

    公开(公告)号：US10230372B2

    公开(公告)日：2019-03-12

    申请号：US15959176

    申请日：2018-04-21

    Applicant: Texas Instruments Incorporated

    Inventor： Danyang Zhu ,  Jie Feng ,  Xiaonan Wang ,  Ball Fan

    IPC: H03K19/0185 ,  H03K5/003 ,  H03K19/0175 ,  H03K5/19 ,  H03K17/0412

    Abstract: A lever shifter includes an output driver and a high-side gate driver. The high-side gate driver is configured to drive the high-side output transistor, and is coupled to an on pulse signal line that conducts an on pulse, and is coupled to an off pulse signal line that conducts an off pulse. The high-side gate driver includes a blocking circuit configured to enable generation of a drive signal to the high-side output transistor based on a voltage of a first of the on or off pulse signal line being greater than a first predetermined amount and a voltage of a second of the on or off signal line being less than a second predetermined amount.

    High voltage level shifter with short propagation delay
    5.
    发明授权
    High voltage level shifter with short propagation delay 有权

    公开(公告)号：US10374606B2

    公开(公告)日：2019-08-06

    申请号：US16260428

    申请日：2019-01-29

    Applicant: Texas Instruments Incorporated

    Inventor： Danyang Zhu ,  Jie Feng ,  Xiaonan Wang ,  Ball Fan

    IPC: H03K19/0185 ,  H03K5/19 ,  H03K19/0175 ,  H03K17/0412 ,  H03K5/003

    Abstract: A lever shifter includes an output driver and a high-side gate driver. The high-side gate driver is configured to drive the high-side output transistor, and is coupled to an on pulse signal line that conducts an on pulse, and is coupled to an off pulse signal line that conducts an off pulse. The high-side gate driver includes a blocking circuit configured to enable generation of a drive signal to the high-side output transistor based on a voltage of a first of the on or off pulse signal line being greater than a first predetermined amount and a voltage of a second of the on or off signal line being less than a second predetermined amount.

    AUDIO ACCESSORY CIRCUITRY AND METHOD COMPATIBLE WITH BOTH MSFT MODE AND DIGITAL COMMUNICATION MODE
    7.
    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。

    Initial command to switch transistors disconnecting keys from microphone line
    10.
    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

    IPC: H04R5/033 ,  H04R29/00 ,  H04R1/10

    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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