Invention Grant
- Patent Title: Method and apparatus for physical-aware hold violation fixing
-
Application No.: US14633477Application Date: 2015-02-27
-
Publication No.: US09727684B2Publication Date: 2017-08-08
- Inventor: Hongwei Dai , Jifeng Li , Jia Niu , Yu Yun Song
- Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Applicant Address: KY Grand Cayman
- Assignee: GLOBALFOUNDRIES INC.
- Current Assignee: GLOBALFOUNDRIES INC.
- Current Assignee Address: KY Grand Cayman
- Agency: Roberts Mlotkowski Safran Cole & Calderon, P.C.
- Agent David Cain; Andrew M. Calderon
- Priority: CN201410072528 20140228
- Main IPC: G06F17/50
- IPC: G06F17/50

Abstract:
The present invention discloses a method for fixing hold time violations in circuits. The method comprises: creating a topology diagram of the circuit with a branch indicating a signal path where the hold time violation occurs in the circuit, and a node on the branch indicating a port of an element where the hold time violation occurs; dividing the circuit into a plurality of regions; and placing a hold time correction element selectively in a region corresponding to the node in the topology diagram to fix the hold time violation thereof, according to a circuit element density of the region corresponding to the node in the topology diagram. With this method there will be no new element in a region whose circuit element density is excessively large, and it is unnecessary to move an element which has been placed in the circuit and an input/output pin thereof.
Public/Granted literature
- US20150248520A1 Method and Apparatus for Physical-Aware Hold Violation Fixing Public/Granted day:2015-09-03
Information query