ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,747, issued on March 25, was assigned to MARVELL ASIA PTE LTD (Singapore).
"Clock monitoring using pointer techniques" was invented by Madhusudhan Harigovindan Thekkeettil (Cupertino, Calif.) and Josef Mueller (San Jose, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Two pointers are initialized. The first pointer is incremented every M cycles of a monitored clock and the second pointer is incremented every N cycles of a reference clock, where M and N are determined from a frequency relationship between the clocks. If the positions of the pointers are determined to differ by more than a drift threshold, an error is detected and corrective ac...