-
公开(公告)号：US09854355B2
公开(公告)日：2017-12-26
申请号：US14641283
申请日：2015-03-06
Applicant: Apple Inc.
Inventor： Roderick B. Hogan , Joseph C. Curcio , David C. Breece, III , Cara S. Yang , Nathan Johanningsmeier , Kavitha Srinivasan
CPC classification number: H04R3/00 , H02M3/07 , H04R1/1041 , H04R2420/05
Abstract: Circuits, methods, and apparatus for grounding contacts in an audio jack. One example may provide a driver, such as a charge pump, driving a first transistor or switch coupled between a first contact in an audio jack and ground, and a second transistor or switch coupled between a second contact in the audio jack and ground. The first transistor or switch and second transistor or switch may be p-channel transistors or n-channel transistors depletion or enhancement-mode transistors, floating-gate transistors, MEMs, relays, or other switching devices. The first and second transistors or switches may be on and conducting when power is removed from the driver.
-
公开(公告)号：US20140093103A1
公开(公告)日：2014-04-03
申请号：US13630202
申请日：2012-09-28
Applicant: APPLE INC.
Inventor： David C. Breece, III , Nathan Johanningsmeier , Cara S. Yang
IPC: H03F99/00
CPC classification number: H03F1/26 , H03F3/181 , H03F3/45475 , H03F3/68 , H03F2203/45528 , H03F2203/45594 , H04R5/04 , H04R2420/05
Abstract: An audio source device has an audio connector to which an external load can be connected. An audio signal is amplified and then driven through the connector, wherein the amplification process uses feedback from the return pin of the connector. The return pin is directly connected to a ground break resistor circuit. The ground break resistor circuit is connected between the return pin of the audio connector and circuit ground. A determination is made as to whether the connected external load has a low impedance or a high impedance. When a low impedance load is detected, such as a headset, the ground break resistor circuit is essentially short-circuited. When a high impedance load is detected, the ground break resistor circuit is maintained and its value is set in accordance with the detected load. Other embodiments are also described.
Abstract translation: 音频源设备具有可连接外部负载的音频连接器。 音频信号被放大然后通过连接器驱动，其中放大过程使用来自连接器的返回引脚的反馈。 返回引脚直接连接到断路电阻电路。 接地断路电阻连接在音频连接器的回路引脚和电路接地之间。 确定连接的外部负载是否具有低阻抗或高阻抗。 当检测到低阻抗负载（例如耳机）时，接地断路电阻电路基本上短路。 当检测到高阻抗负载时，保持接地断路电阻电路，并根据检测到的负载设定其值。 还描述了其它实施例。
-
公开(公告)号：US20150249876A1
公开(公告)日：2015-09-03
申请号：US14641283
申请日：2015-03-06
Applicant: Apple Inc.
Inventor： Roderick B. Hogan , Joseph C. Curcio , David C. Breece III , Cara S. Yang , Nathan Johanningsmeier , Kavitha Srinivasan
CPC classification number: H04R3/00 , H02M3/07 , H04R1/1041 , H04R2420/05
Abstract: Circuits, methods, and apparatus for grounding contacts in an audio jack. One example may provide a driver, such as a charge pump, driving a first transistor or switch coupled between a first contact in an audio jack and ground, and a second transistor or switch coupled between a second contact in the audio jack and ground. The first transistor or switch and second transistor or switch may be p-channel transistors or n-channel transistors depletion or enhancement-mode transistors, floating-gate transistors, MEMs, relays, or other switching devices. The first and second transistors or switches may be on and conducting when power is removed from the driver.
Abstract translation: 音频插孔接地触点的电路，方法和设备。 一个示例可以提供驱动器，例如电荷泵，驱动耦合在音频插座和地之间的第一触点之间的第一晶体管或开关，以及耦合在音频插孔和地之间的第二触点之间的第二晶体管或开关。 第一晶体管或开关和第二晶体管或开关可以是p沟道晶体管或n沟道晶体管耗尽或增强型晶体管，浮栅晶体管，MEM，继电器或其它开关器件。 当从驱动器去除电力时，第一和第二晶体管或开关可以导通和导通。
-
公开(公告)号：US09099967B2
公开(公告)日：2015-08-04
申请号：US13630202
申请日：2012-09-28
Applicant: Apple Inc.
Inventor： David C. Breece, III , Nathan Johanningsmeier , Cara S. Yang
CPC classification number: H03F1/26 , H03F3/181 , H03F3/45475 , H03F3/68 , H03F2203/45528 , H03F2203/45594 , H04R5/04 , H04R2420/05
Abstract: An audio source device has an audio connector to which an external load can be connected. An audio signal is amplified and then driven through the connector, wherein the amplification process uses feedback from the return pin of the connector. The return pin is directly connected to a ground break resistor circuit. The ground break resistor circuit is connected between the return pin of the audio connector and circuit ground. A determination is made as to whether the connected external load has a low impedance or a high impedance. When a low impedance load is detected, such as a headset, the ground break resistor circuit is essentially short-circuited. When a high impedance load is detected, the ground break resistor circuit is maintained and its value is set in accordance with the detected load. Other embodiments are also described.
Abstract translation: 音频源设备具有可连接外部负载的音频连接器。 音频信号被放大然后通过连接器驱动，其中放大过程使用来自连接器的返回引脚的反馈。 返回引脚直接连接到断路电阻电路。 接地断路电阻连接在音频连接器的回路引脚和电路接地之间。 确定连接的外部负载是否具有低阻抗或高阻抗。 当检测到低阻抗负载（例如耳机）时，接地断路电阻电路基本上短路。 当检测到高阻抗负载时，保持接地断路电阻电路，并根据检测到的负载设定其值。 还描述了其它实施例。
-
-
-
Search Results
4
records
(took 0.011 seconds)
