公开(公告)号：US20240275369A1

公开(公告)日：2024-08-15

申请号：US18647662

申请日：2024-04-26

申请人： Apple Inc.

发明人： Helena Deirdre O'SHEA ,  Dmitry CHERNIAVSKY ,  Tim SCHOENAUER ,  Ali MOAZ ,  Rahmi HEZAR ,  Ram KANUMALLI

IPC分类号： H03K5/1252 ,  G06F1/08 ,  G06F13/40

CPC分类号： H03K5/1252 ,  G06F1/08 ,  G06F13/4027

摘要： Embodiments relate to updating spur cancellation at a victim integrated circuit (IC) in accordance with dynamic changes in the operating frequencies of an aggressor IC. The aggressor IC changes its operating frequencies at an update time that is determined in advance. The update time and the changes to the operating frequencies are shared with the victim IC. The victim IC dynamically updates the relationships between frequencies of local clock signals for the victim IC and the aggressor IC. The victim IC generates a spur cancellation parameter based on the updated relationships of local clock frequencies, the update time and the changes to the operating frequencies of the aggressor IC, and configures a spur cancellation circuit. In this way, the victim IC may perform effective spur cancellation despite changes in the operating frequencies of the aggressor IC and deviation of the local clock frequencies.

公开(公告)号：US20240056066A1

公开(公告)日：2024-02-15

申请号：US18456364

申请日：2023-08-25

申请人： Apple Inc.

发明人： Helena Deirdre O'SHEA ,  Ali MOAZ ,  Tim SCHOENAUER ,  Rahmi HEZAR

IPC分类号： H03K5/1252 ,  G06F21/71

CPC分类号： H03K5/1252 ,  G06F21/71

摘要： Embodiments relate to identifying frequencies to be protected at a victim integrated circuit (IC) and sending protection information including the identified frequencies to an aggressor IC. The aggressor IC configures its subsystems or circuits to operate using operating frequencies that prevents spurs that may interfere with the frequencies identified in the protection information. If not all of the frequencies in the protection information can be protected, the aggressor IC selects a subset of the frequencies to be protected. Then, the aggressor IC configures the operating frequencies of its subsystems or circuits so that spurs that they generate do not interfere with the selected frequencies.