The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 2025
Filed:
Nov. 30, 2023
Apple Inc., Cupertino, CA (US);
Robert E. Jeter, Santa Clara, CA (US);
Jingkui Zheng, Sunnyvale, CA (US);
Srinivasa Rao Masanam, Cedar Park, TX (US);
Apple Inc., Cupertino, CA (US);
Abstract
An apparatus for performing memory calibrations during a performance state change is disclosed. A memory controller is configured to convey a clock signal to a memory and includes a calibration control circuit configured to perform a plurality of calibrations of the clock signal during a change from a first one to a second one of a plurality of performance states, and a delay circuit configured to apply a delay to clock signal conveyed to the memory. In performing a one of the calibrations, the calibration control circuit is configured to convey, to the memory, a first command to begin a timing test that generates a count value indicative of a current voltage of the memory, receive the count value from the memory at a conclusion of the timing test, and cause the delay circuit to adjust, based on the count value, the delay applied to the clock signal.