Invention Application
- Patent Title: Fast Common Mode Charging
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Application No.: US18339232Application Date: 2023-06-21
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Publication No.: US20240430138A1Publication Date: 2024-12-26
- Inventor: Charles L. Wang , Yi-Hsiu E. Chen , Yu-Yau Guo , Wei-Ming Lee
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Main IPC: H04L25/02
- IPC: H04L25/02 ; G06F13/40

Abstract:
An apparatus for performing a fast common mode recharge is disclosed. The apparatus includes a transmitter circuit configured to transmit a differential signal on a communication bus that includes a true signal line and a complement signal line and a measurement circuit configured to measure respective voltage levels of the true signal line and the complement signal line. The apparatus further includes a control circuit configured to, in response to exiting a sleep mode, select one of a plurality of operation modes using the respective voltage levels of the true signal line and the complement signal line. The transmitter circuit is further configured to adjust the respective voltage levels of the true signal line and the complement signal line based on a selected operation mode of the plurality of operation modes.
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