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:
Nov. 21, 2017
Filed:
Apr. 08, 2015
Apple Inc., Cupertino, CA (US);
Karthik Rajagopal, Mountain View, CA (US);
Narayanan V. Thondugulam, Sunnyvale, CA (US);
Rahul Sharma, Milpitas, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A method for designing a clock tree is disclosed. In one embodiment, a preliminary clock tree design for an integrated circuit (IC) is processed. The clock tree includes a root node, a number of intermediate levels, and a leaf level that is coupled to a number of clocked circuits. Clock gating circuits are placed at the leaf level of the clock tree, and at least some of the intermediate levels. Processing the preliminary clock tree design includes ensuring that an equal number of clock gating circuits are coupled between each leaf level clock gating circuit and the root node. After processing the preliminary clock tree design, clock tree synthesis is performed by executing a clock tree synthesis tool on a computer system to generate a synthesized clock tree design.