JP4061295B2 - デジタル回路の統計的タイミング解析のためのシステムおよび方法 - Google Patents
デジタル回路の統計的タイミング解析のためのシステムおよび方法 Download PDFInfo
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- JP4061295B2 JP4061295B2 JP2004269187A JP2004269187A JP4061295B2 JP 4061295 B2 JP4061295 B2 JP 4061295B2 JP 2004269187 A JP2004269187 A JP 2004269187A JP 2004269187 A JP2004269187 A JP 2004269187A JP 4061295 B2 JP4061295 B2 JP 4061295B2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/32—Circuit design at the digital level
- G06F30/33—Design verification, e.g. functional simulation or model checking
- G06F30/3308—Design verification, e.g. functional simulation or model checking using simulation
- G06F30/3312—Timing analysis
Description
320 ノードb
330 ノードc
340 エッジdac
350 エッジdbc
410 ノードa
420 ノードb
430 ノードc
440 エッジdab
450 エッジdac
Claims (15)
- 電気回路のタイミングを解析するためのプログラムであって、
コンピュータに、
a)入力される、前記電気回路のネットリスト、1つまたは複数のアサーション、1つまたは複数のパラメータ化された遅延モデル、および1つまたは複数の変動要因についての情報を読み取り、メモリに格納するステップと、
b)前記メモリに格納された前記情報を用いて、1つまたは複数のノードおよび1つまたは複数のエッジを有し、前記電気回路を表現するタイミング・グラフを作成するステップと、
c)統計的到達時間の前方伝播について前記タイミング・グラフをレベル付けするステップと、
d)前記タイミング・グラフの各レベルで、前記ノードの各々での1つまたは複数の統計的到達時間を、前記統計的到達時間の各々が1つまたは複数の前記変動要因の確率分布による確率変数および前記エッジについての重み係数を用いて計算された形式に表現されるように、伝播させるステップと、
を実行させるための前記プログラム。 - 前記統計的到達時間が、前記電気回路の各ノードについての到達時間によって決定される、請求項1に記載のプログラム。
- 前記電気回路の1つまたは複数のノードの統計的スリューが、1つまたは複数の前記変動要因の確率分布による確率変数および前記エッジについての重み係数を用いて計算された形式で決定され、出力される、請求項1に記載のプログラム。
- 遅いモードの統計的タイミング解析が実行される、請求項1に記載のプログラム。
- 早いモードの統計的タイミング解析が実行される、請求項1に記載のプログラム。
- 別個の立ち上がりおよび立ち下がりの統計的遅延が、前記電気回路の各構成要素に供給され、前記電気回路の1つまたは複数のノードについて、別個の立ち上がりおよび立ち下がりの統計的到達時間が決定される、請求項1に記載のプログラム。
- 前記電気回路の1つまたは複数のノードで、1つまたは複数の別個の立ち上がりおよび立ち下がりの統計的要求到達時間、別個の立ち上がりおよび立ち下がりの統計的スラック、および別個の立ち上がりおよび立ち下がりの統計的スリューが決定される、請求項6に記載のプログラム。
- 前記電気回路の各構成要素についての前記パラメータ化された遅延モデルが、確定的部分、相関部分、および独立なランダム部分のうちの1つまたは複数の部分を含む、請求項1に記載のプログラム。
- 前記変動要因が相関している、請求項8に記載のプログラム。
- 前記変動要因が独立である、請求項8に記載のプログラム。
- 前記パラメータ化された遅延モデルが、回路シミュレータによってオンザフライに決定される、請求項1に記載のプログラム。
- 各アサーションが、確定的か統計的かのいずれかである、請求項1に記載のプログラム。
- a)統計的要求到達時間の後方伝播について前記タイミング・グラフをレベル付けするステップと、
b)前記タイミング・グラフの各レベルで、前記ノードの各々での1つまたは複数の統計的要求到達時間を、前記統計的要求到達時間の各々が1つまたは複数の前記変動要因の確率分布による確率変数および前記エッジについての重み係数を用いて計算された形式に表現されるように、伝播させるステップと、
をさらに含む、請求項1に記載のプログラム。 - 前記統計的要求到達時間が、前記電気回路の各ノードについての到達時間によって決定される、請求項13に記載のプログラム。
- 前記電気回路の1つまたは複数のノードの統計的スラックが、1つまたは複数の前記変動要因の確率分布による確率変数および前記エッジについての重み係数を用いて計算された形式で決定され、出力される、請求項13に記載のプログラム。
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US10/666,353 US7428716B2 (en) | 2003-09-19 | 2003-09-19 | System and method for statistical timing analysis of digital circuits |
Publications (3)
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JP2005092885A JP2005092885A (ja) | 2005-04-07 |
JP2005092885A5 JP2005092885A5 (ja) | 2007-03-29 |
JP4061295B2 true JP4061295B2 (ja) | 2008-03-12 |
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JP2004269187A Expired - Fee Related JP4061295B2 (ja) | 2003-09-19 | 2004-09-16 | デジタル回路の統計的タイミング解析のためのシステムおよび方法 |
Country Status (4)
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US (2) | US7428716B2 (ja) |
JP (1) | JP4061295B2 (ja) |
CN (1) | CN100350414C (ja) |
TW (1) | TWI311717B (ja) |
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-
2003
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US8010921B2 (en) | 2011-08-30 |
US20050065765A1 (en) | 2005-03-24 |
CN1627302A (zh) | 2005-06-15 |
CN100350414C (zh) | 2007-11-21 |
US7428716B2 (en) | 2008-09-23 |
JP2005092885A (ja) | 2005-04-07 |
TWI311717B (en) | 2009-07-01 |
US20090013294A1 (en) | 2009-01-08 |
TW200527237A (en) | 2005-08-16 |
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