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公开(公告)号：US20240430138A1
公开(公告)日：2024-12-26
申请号：US18339232
申请日：2023-06-21
Applicant: Apple Inc.
Inventor： Charles L. Wang , Yi-Hsiu E. Chen , Yu-Yau Guo , Wei-Ming Lee
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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公开(公告)号：US20240305287A1
公开(公告)日：2024-09-12
申请号：US18664505
申请日：2024-05-15
Applicant: APPLE INC.
Inventor： Charles L. Wang , Yi-Hsiu E. Chen , Pranavi Sunkara
Abstract: The present disclosure describes embodiments of driver circuit. The driver circuit includes a first impedance element electrically coupled to a first inverter circuit and a second impedance element electrically coupled to the first impedance element and a second inverter circuit. For a first encoding using the driver circuit, the first inverter circuit and the second inverter circuit are controlled such that a first current flows through the first and second impedance elements, the first current having a first value and a first direction. For a second encoding using the driver circuit, the first inverter circuit and the second inverter circuit are controlled such that a second current flows through the first and second impedance elements, the second current having a second value and a second direction. The first value is substantially the same as the second value and the first direction is opposite to the second direction.
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公开(公告)号：US12015413B2
公开(公告)日：2024-06-18
申请号：US17945429
申请日：2022-09-15
Applicant: Apple Inc.
Inventor： Charles L. Wang , Yi-Hsiu E. Chen , Pranavi Sunkara
Abstract: The present disclosure describes embodiments of driver circuit. The driver circuit includes a first impedance element electrically coupled to a first inverter circuit and a second impedance element electrically coupled to the first impedance element and a second inverter circuit. For a first encoding using the driver circuit, the first inverter circuit and the second inverter circuit are controlled such that a first current flows through the first and second impedance elements, the first current having a first value and a first direction. For a second encoding using the driver circuit, the first inverter circuit and the second inverter circuit are controlled such that a second current flows through the first and second impedance elements, the second current having a second value and a second direction. The first value is substantially the same as the second value and the first direction is opposite to the second direction.
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