Invention Application
- Patent Title: Precise Time Management Using Local Time Base
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Application No.: US17472242Application Date: 2021-09-10
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Publication No.: US20220085969A1Publication Date: 2022-03-17
- Inventor: Christopher D. Finan , Alexander Ukanwa , Charles F. Dominguez , Jean-Didier Allegrucci , Jeffrey J. Irwin , Kalpana Bansal , Michael Bekerman , Remi Clavel
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Main IPC: H04L7/00
- IPC: H04L7/00

Abstract:
A method and apparatus for synchronizing a timebase is disclosed. A timebase management circuit includes limit circuitry, in a first clock domain, which generates, based on a global timebase, an initial timebase limit. The timebase management circuit includes, in a second clock domain, adjustment circuitry that generates an adjusted timebase limit based on the initial timebase limit. A storage circuit in the second clock domain stores a local timebase. Update circuitry, coupled to an output of the storage circuit, generates an updated local timebase using a clock signal in the second clock domain, wherein the updated local timebase is subject to the adjusted timebase limit.
Public/Granted literature
- US11683149B2 Precise time management using local time base Public/Granted day:2023-06-20
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