公开(公告)号：US20240364285A1

公开(公告)日：2024-10-31

申请号：US18139135

申请日：2023-04-25

Applicant: Apple Inc.

Inventor： Tao SUN ,  Karthikeyan Reddy ,  Hyunsik Park

IPC: H03F3/45 ,  G01R19/00 ,  G05F1/46 ,  H03F1/26

CPC classification number: H03F3/45076 ,  G01R19/0053 ,  G05F1/46 ,  H03F1/26 ,  H03F2200/372 ,  H03F2203/45288

Abstract: The present disclosure describes an apparatus, system, and method for cancelling noise (e.g., power supply noise). For example, the apparatus can include a load circuit, a sense resistor, and a current compensation circuit. The load circuit is configured to draw a first current (e.g., a load current). The sense resistor is configured to provide a voltage based on the first current. The current compensation circuit is configured to generate a second current (e.g., a compensation current) based on the voltage. A sum of the first current and the second current can be substantially constant.