公开(公告)号：US20220095443A1

公开(公告)日：2022-03-24

申请号：US17031570

申请日：2020-09-24

Applicant: Apple Inc.

Inventor： Daniel Jacob Benjamin BECHSTEIN ,  MohammadAli KHORRAMI ,  Vipin AYANOOR-VITIKKATE ,  Blake R. MARSHALL ,  Zhibin WANG ,  Ying CAO ,  Robert Ubo LIU ,  John Stephen SMITH

IPC: H05F3/00 ,  G06F3/0354

Abstract: An electrostatic discharge (ESD) robust design for an input device such as a stylus is disclosed. The input device can include one or more components, such as one or more Schottky diodes, that can be damaged by ESD events. To reduce the likelihood of damage to sensitive components, the parasitic capacitance between sensitive conductive paths and reference ground paths of the input device that could otherwise provide electrostatic discharge paths can be reduced (arranging current limiting resistance at specific locations among sensitive components, creating physical separation between sensitive conductive paths and reference ground paths), shielding can be added to shield the sensitive electronics from ESD pulses, and high dielectric breakdown material can be added to prevent ESD pulse entry or exit of not otherwise protected circuit parts.