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

IPC: H04R1/08 ,  H04R3/00 ,  H02M3/07

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。