公开(公告)号：US20160306404A1

公开(公告)日：2016-10-20

申请号：US14686360

申请日：2015-04-14

Applicant: Apple Inc.

Inventor： Jose V. SANTOS Martinez ,  Collin E. Connors ,  Yongxuan Hu

IPC: G06F1/26 ,  G06F13/38 ,  G06F13/42 ,  G06F1/32 ,  G06F13/40

CPC classification number: G06F1/266 ,  G06F1/325 ,  G06F1/3287 ,  G06F13/385 ,  G06F13/4022 ,  G06F13/4282

Abstract: A circuit for limiting an in-rush current for devices coupling to a capacitive load may include a port configured to receive a device and a first capacitor coupled to the port. Additionally, the circuit may include a first resistor coupled in series with the first capacitor and a switch coupled in parallel with the first resistor. The switch is configured to close after an in-rush current event has passed, thereby bypassing the first resistor from the circuit and enabling the first capacitor to effectively filter noise from the voltage output to the port.

Abstract translation: 用于限制耦合到电容性负载的器件的浪涌电流的电路可以包括被配置为接收器件的端口和耦合到端口的第一电容器。 另外，电路可以包括与第一电容器串联耦合的第一电阻器和与第一电阻器并联耦合的开关。 开关被配置为在浪涌电流事件已经过去之后关闭，从而绕过来自电路的第一电阻器，并且使得第一电容器能够有效地从输出到端口的电压中滤除噪声。