JP2005512237A5 - - Google Patents
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- Publication number
- JP2005512237A5 JP2005512237A5 JP2003551711A JP2003551711A JP2005512237A5 JP 2005512237 A5 JP2005512237 A5 JP 2005512237A5 JP 2003551711 A JP2003551711 A JP 2003551711A JP 2003551711 A JP2003551711 A JP 2003551711A JP 2005512237 A5 JP2005512237 A5 JP 2005512237A5
- Authority
- JP
- Japan
- Prior art keywords
- assertion
- pin
- arc
- timing model
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 claims 19
- 230000000717 retained effect Effects 0.000 claims 2
- 230000002457 bidirectional effect Effects 0.000 claims 1
- 238000004590 computer program Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 claims 1
- 238000013507 mapping Methods 0.000 claims 1
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US33923501P | 2001-12-07 | 2001-12-07 | |
| PCT/US2002/038941 WO2003050725A2 (en) | 2001-12-07 | 2002-12-06 | Assertion handling for timing model extraction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2005512237A JP2005512237A (ja) | 2005-04-28 |
| JP2005512237A5 true JP2005512237A5 (enExample) | 2005-12-22 |
Family
ID=23328095
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003551710A Pending JP2005512236A (ja) | 2001-12-07 | 2002-12-06 | タイミンググラフ縮小によるタイミングモデル抽出 |
| JP2003551711A Pending JP2005512237A (ja) | 2001-12-07 | 2002-12-06 | タイミングモデル抽出のためのアサーションハンドリング |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003551710A Pending JP2005512236A (ja) | 2001-12-07 | 2002-12-06 | タイミンググラフ縮小によるタイミングモデル抽出 |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US7356451B2 (enExample) |
| EP (2) | EP1451730A2 (enExample) |
| JP (2) | JP2005512236A (enExample) |
| AU (2) | AU2002359605A1 (enExample) |
| WO (2) | WO2003050724A2 (enExample) |
Families Citing this family (48)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6857116B1 (en) * | 2000-11-15 | 2005-02-15 | Reshape, Inc. | Optimization of abutted-pin hierarchical physical design |
| WO2003050724A2 (en) * | 2001-12-07 | 2003-06-19 | Cadence Design Systems, Inc. | Timing model extraction by timing graph reduction |
| US6763507B2 (en) * | 2002-01-30 | 2004-07-13 | Agilent Technologies, Inc. | System and method for testing abstracted timing models |
| US6763505B2 (en) * | 2002-04-04 | 2004-07-13 | International Business Machines Corporation | Apparatus and method for automated use of phase abstraction for enhanced verification of circuit designs |
| US6745377B2 (en) * | 2002-04-04 | 2004-06-01 | International Business Machines Corporation | Apparatus and method for representing gated-clock latches for phase abstraction |
| US6925621B2 (en) * | 2002-06-24 | 2005-08-02 | Agilent Technologies, Inc. | System and method for applying timing models in a static-timing analysis of a hierarchical integrated circuit design |
| US6836874B2 (en) * | 2002-06-26 | 2004-12-28 | Agilent Technologies, Inc. | Systems and methods for time-budgeting a complex hierarchical integrated circuit |
| US7096442B2 (en) * | 2003-07-10 | 2006-08-22 | Lsi Logic Corporation | Optimizing IC clock structures by minimizing clock uncertainty |
| US7983891B1 (en) * | 2003-08-19 | 2011-07-19 | Cadence Design Systems, Inc. | Receiver dependent selection of a worst-case timing event for static timing analysis |
| US20050091555A1 (en) * | 2003-10-27 | 2005-04-28 | Tong Xiao | Abstraction generation for hierarchical timing analysis using implicity connectivity graph derived from domain propagation |
| US7243313B1 (en) * | 2003-11-24 | 2007-07-10 | Cadence Design Systems, Inc. | System and method for reducing the size of RC circuits |
| US7076753B2 (en) * | 2003-12-18 | 2006-07-11 | Synopsys, Inc. | Method and apparatus for solving sequential constraints |
| US7606692B2 (en) * | 2004-04-26 | 2009-10-20 | Lsi Corporation | Gate-level netlist reduction for simulating target modules of a design |
| US7089143B2 (en) * | 2004-04-29 | 2006-08-08 | International Business Machines Corporation | Method and system for evaluating timing in an integrated circuit |
| JP2006039621A (ja) * | 2004-07-22 | 2006-02-09 | Nec Electronics Corp | タイミング制約ライブラリの作成方法及び作成システム |
| US20060190235A1 (en) * | 2005-02-22 | 2006-08-24 | Faraday Technology Corp. | Verilog HDL simulation model for retain time |
| US20080115099A1 (en) * | 2006-11-15 | 2008-05-15 | Priyadarsan Patra | Spatial curvature for multiple objective routing |
| JP4872635B2 (ja) * | 2006-12-06 | 2012-02-08 | 日本電気株式会社 | 電子回路用プリント基板の設計方法とシステム |
| US7926011B1 (en) * | 2007-01-10 | 2011-04-12 | Cadence Design Systems, Inc. | System and method of generating hierarchical block-level timing constraints from chip-level timing constraints |
| US8365113B1 (en) * | 2007-01-10 | 2013-01-29 | Cadence Design Systems, Inc. | Flow methodology for single pass parallel hierarchical timing closure of integrated circuit designs |
| US8977995B1 (en) * | 2007-01-10 | 2015-03-10 | Cadence Design Systems, Inc. | Timing budgeting of nested partitions for hierarchical integrated circuit designs |
| US8640066B1 (en) * | 2007-01-10 | 2014-01-28 | Cadence Design Systems, Inc. | Multi-phase models for timing closure of integrated circuit designs |
| JP2009037278A (ja) * | 2007-07-31 | 2009-02-19 | Nec Corp | 動作タイミング検証装置、方法、及び、プログラム |
| US8239798B1 (en) * | 2007-08-03 | 2012-08-07 | Cadence Design Systems, Inc. | Methods, systems, and apparatus for variation aware extracted timing models |
| US7962872B2 (en) * | 2007-12-04 | 2011-06-14 | Texas Instruments Incorporated | Timing analysis when integrating multiple circuit blocks while balancing resource requirements and accuracy |
| US8499230B2 (en) * | 2008-05-07 | 2013-07-30 | Lsi Corporation | Critical path monitor for an integrated circuit and method of operation thereof |
| US8122404B2 (en) * | 2009-02-19 | 2012-02-21 | International Business Machines Corporation | Performing a statistical timing abstraction for a hierarchical timing analysis of VLSI circuits |
| US8239805B2 (en) | 2009-07-27 | 2012-08-07 | Lsi Corporation | Method for designing integrated circuits employing a partitioned hierarchical design flow and an apparatus employing the method |
| US8341573B2 (en) * | 2010-10-15 | 2012-12-25 | Lsi Corporation | Modeling approach for timing closure in hierarchical designs leveraging the separation of horizontal and vertical aspects of the design flow |
| US8458637B2 (en) * | 2010-10-22 | 2013-06-04 | International Business Machines Corporation | Implementing enhanced RLM connectivity on a hierarchical design with top level pipeline registers |
| US8589846B2 (en) * | 2011-12-02 | 2013-11-19 | Synopsys, Inc. | Modeling transition effects for circuit optimization |
| US8522179B1 (en) * | 2012-02-06 | 2013-08-27 | Lsi Corporation | System and method for managing timing margin in a hierarchical integrated circuit design process |
| US8990445B2 (en) * | 2012-03-05 | 2015-03-24 | Mediatek Inc. | Control chip for communicating with wired connection interface by using one configurable pin selectively serving as input pin or output pin |
| US8578304B1 (en) * | 2012-07-26 | 2013-11-05 | International Business Machines Corporation | Implementing mulitple mask lithography timing variation mitigation |
| US20140156233A1 (en) * | 2012-12-03 | 2014-06-05 | Can Wang | Method and apparatus for electronic circuit simulation |
| US8977998B1 (en) * | 2013-02-21 | 2015-03-10 | Altera Corporation | Timing analysis with end-of-life pessimism removal |
| US8713502B1 (en) | 2013-02-26 | 2014-04-29 | International Business Machines Corporation | Methods and systems to reduce a number of simulations in a timing analysis |
| TW201523312A (zh) * | 2013-09-06 | 2015-06-16 | Blue Pearl Software Inc | 使用者灰色單元 |
| US9940431B2 (en) | 2016-01-07 | 2018-04-10 | International Business Machines Corporation | Accurate statistical timing for boundary gates of hierarchical timing models |
| JP2017167732A (ja) * | 2016-03-15 | 2017-09-21 | 株式会社東芝 | 回路設計検証装置およびプログラム |
| US10223493B1 (en) | 2016-06-28 | 2019-03-05 | Altera Corporation | Dynamic tag allocation for clock reconvergence pessimism removal |
| US9977850B2 (en) * | 2016-07-12 | 2018-05-22 | International Business Machines Corporation | Callback based constraint processing for clock domain independence |
| US10394987B2 (en) * | 2017-03-21 | 2019-08-27 | International Business Machines Corporation | Adaptive bug-search depth for simple and deep counterexamples |
| US11176293B1 (en) * | 2018-03-07 | 2021-11-16 | Synopsys, Inc. | Method and system for emulation clock tree reduction |
| US10747925B1 (en) * | 2019-01-25 | 2020-08-18 | International Business Machines Corporation | Variable accuracy incremental timing analysis |
| US11188696B1 (en) * | 2019-04-15 | 2021-11-30 | Cadence Design Systems, Inc. | Method, system, and product for deferred merge based method for graph based analysis pessimism reduction |
| US10831954B1 (en) | 2019-10-29 | 2020-11-10 | International Business Machines Corporation | Technology lookup table-based default assertion generation and consumption for timing closure of VLSI designs |
| US10891412B1 (en) | 2020-02-13 | 2021-01-12 | International Business Machines Corporation | Offline analysis of hierarchical electronic design automation derived data |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5657239A (en) * | 1992-10-30 | 1997-08-12 | Digital Equipment Corporation | Timing verification using synchronizers and timing constraints |
| US5508937A (en) * | 1993-04-16 | 1996-04-16 | International Business Machines Corporation | Incremental timing analysis |
| US5581473A (en) * | 1993-06-30 | 1996-12-03 | Sun Microsystems, Inc. | Method and apparatus for managing timing requirement specifications and confirmations and generating timing models and constraints for a VLSI circuit |
| US5469367A (en) * | 1994-06-06 | 1995-11-21 | University Technologies International Inc. | Methodology and apparatus for modular partitioning for the machine design of asynchronous circuits |
| US5535145A (en) | 1995-02-03 | 1996-07-09 | International Business Machines Corporation | Delay model abstraction |
| US5740347A (en) | 1995-05-01 | 1998-04-14 | Synopsys, Inc. | Circuit analyzer of black, gray and transparent elements |
| US5778216A (en) * | 1995-06-30 | 1998-07-07 | Cadence Design Systems, Inc. | Method for hierarchical time drive circuit layout by rebudgeting timing constraints of plurality of logical blocks after placement |
| US5790830A (en) | 1995-12-29 | 1998-08-04 | Synopsys, Incorporated | Extracting accurate and efficient timing models of latch-based designs |
| US5796621A (en) | 1996-07-31 | 1998-08-18 | International Business Machines Corporation | Circuit delay abstraction tool |
| US5923564A (en) * | 1996-08-12 | 1999-07-13 | Advanced Micro Devices, Inc. | Performance analysis including half-path joining |
| US5946475A (en) * | 1997-01-21 | 1999-08-31 | International Business Machines Corporation | Method for performing transistor-level static timing analysis of a logic circuit |
| US6421818B1 (en) | 1998-02-20 | 2002-07-16 | Lsi Logic Corporation | Efficient top-down characterization method |
| US6212665B1 (en) * | 1998-03-27 | 2001-04-03 | Synopsys, Inc. | Efficient power analysis method for logic cells with many output switchings |
| US6247165B1 (en) * | 1998-03-31 | 2001-06-12 | Synopsys, Inc. | System and process of extracting gate-level descriptions from simulation tables for formal verification |
| US6321362B1 (en) | 1999-04-06 | 2001-11-20 | International Business Machines Corporation | Method of reformulating static circuit optimization problems for reduced size, degeneracy and redundancy |
| WO2001008028A2 (en) | 1999-07-23 | 2001-02-01 | Koninklijke Philips Electronics Nv | Timing shell automation for hardware macro-cell modeling |
| US6539536B1 (en) | 2000-02-02 | 2003-03-25 | Synopsys, Inc. | Electronic design automation system and methods utilizing groups of multiple cells having loop-back connections for modeling port electrical characteristics |
| US6591407B1 (en) | 2000-03-01 | 2003-07-08 | Sequence Design, Inc. | Method and apparatus for interconnect-driven optimization of integrated circuit design |
| US7103863B2 (en) | 2001-06-08 | 2006-09-05 | Magma Design Automation, Inc. | Representing the design of a sub-module in a hierarchical integrated circuit design and analysis system |
| EP1402426A2 (en) * | 2001-06-08 | 2004-03-31 | Magma Design Automation, Inc. | Method for generating design constraints for modulates in a hierarchical integrated circuit design system |
| US6609233B1 (en) * | 2001-08-10 | 2003-08-19 | Hewlett-Packard Development Company, L.P. | Load sensitivity modeling in a minimal level sensitive timing abstraction model |
| WO2003050724A2 (en) * | 2001-12-07 | 2003-06-19 | Cadence Design Systems, Inc. | Timing model extraction by timing graph reduction |
-
2002
- 2002-12-06 WO PCT/US2002/038799 patent/WO2003050724A2/en not_active Ceased
- 2002-12-06 AU AU2002359605A patent/AU2002359605A1/en not_active Abandoned
- 2002-12-06 US US10/313,247 patent/US7356451B2/en not_active Expired - Fee Related
- 2002-12-06 WO PCT/US2002/038941 patent/WO2003050725A2/en not_active Ceased
- 2002-12-06 JP JP2003551710A patent/JP2005512236A/ja active Pending
- 2002-12-06 EP EP02786901A patent/EP1451730A2/en not_active Ceased
- 2002-12-06 JP JP2003551711A patent/JP2005512237A/ja active Pending
- 2002-12-06 EP EP02794153A patent/EP1451731A2/en not_active Ceased
- 2002-12-06 AU AU2002351253A patent/AU2002351253A1/en not_active Abandoned
- 2002-12-06 US US10/313,774 patent/US6928630B2/en not_active Expired - Lifetime
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