Presentation 2006/3/9
A Clock Tree Construction Method Under Delay Variations
Masayuki IGUCHI, Atsushi TAKAHASHI,
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Abstract(in English) As LSI chips become larger and faster, the effect of delay variations on the circuit behavior becomes larger. The consideration of delay variations is requested in semi-synchronous circuits that use the difference of clock delays effectively, too. In this paper, we propose a clock tree construction method that takes delay variations of a long time constant into account. In the proposed method, first, an objective clock schedule is obtained under the assumption that delay variations of clock delay are proportional to the wire length, but that the delay variations on the common part of clock wire to a register pair with signal propagation do not affect the circuit behavior. Then, a clock tree is constructed so that the clock schedule realized by the clock tree approaches the objective clock schedule. In experiments, the validity of the proposed method is confirmed.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) semi-synchronous circuit / delay variation / clock-tree / minimum clock period
Paper # DC2005-93
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Committee DC
Conference Date 2006/3/9(1days)
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Registration To Dependable Computing (DC)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A Clock Tree Construction Method Under Delay Variations
Sub Title (in English)
Keyword(1) semi-synchronous circuit
Keyword(2) delay variation
Keyword(3) clock-tree
Keyword(4) minimum clock period
1st Author's Name Masayuki IGUCHI
1st Author's Affiliation Department of Communications and Integrated Systems, Tokyo Institute of Technology()
2nd Author's Name Atsushi TAKAHASHI
2nd Author's Affiliation Department of Communications and Integrated Systems, Tokyo Institute of Technology
Date 2006/3/9
Paper # DC2005-93
Volume (vol) vol.105
Number (no) 671
Page pp.pp.-
#Pages 6
Date of Issue