Patent · US Active

Integrated skew control

US11256284B2 · kind B2 · utility

1Cited by

16References

18Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Andreas H. A. Arp · Nufringen, DE
Andre Hertwig · Waldenbuch, DE
Michael V. Koch · Ehningen, DE
Matthias Ringe · Lörrach, DE

Key dates

Filing date	Jan 7, 2020
Grant date	Feb 22, 2022
Priority date	—
Expiry date	Jun 13, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH03K19/00323
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

Disclosed aspects relate to a clock distribution network of a synchronous logic device. The synchronous logic device has sub-circuits having different clock domains. The clock domains form a hierarchical structure. The clock distribution network has a clock source to provide a global clock signal. A programmable delay line associated with a sub-circuit generates a local clock signal for the sub-circuit by delaying the signal. A global skew control circuit can manage clock skew between the local clock signals. The global skew control circuit may adjust a delay, determine initial operations for the delay lines, verify whether it is possible to perform the initial operations, and perform a correction operation. The correction operation can include correcting the control commands such that the corrected commands lead to the same change of skew adjustment between the local clocks.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.