Increased effective flip-flop density in a structured ASIC

Details Increased effective flip-flop density in a structured ASIC Increased effective flip-flop density in a structured ASIC

2006-07-10

2008-12-02

Lin, Sun J (Department: 2825)

Computer-aided design and analysis of circuits and semiconductor

Nanotechnology related integrated circuit design

C716S030000, C716S030000, C716S030000

Reexamination Certificate

active

07461365

ABSTRACT:
An H-tree is formed in a conducting layer over a base array of a structured ASIC, an H-tree being a predefined constraint imposed on ad hoc circuit designs adapted to make use of the base array and H-tree. The endpoints of the H-tree are formed at or near sequential elements. When the H-tree is used as part of a clock structure, clock skew to the sequential elements is minimized as is the consumption of routing resources for forming the clock structure. When a pulse generator is coupled to the H-tree, each individual flip-flop of a plurality of flip-flops can be emulated with an individual latch, thereby increasing effective flip-flop density.

REFERENCES:
patent: 3832686 (1974-08-01), Bilgutay
patent: 5337285 (1994-08-01), Ware et al.
patent: 5537068 (1996-07-01), Konno
patent: 5867446 (1999-02-01), Konishi et al.
patent: 5883534 (1999-03-01), Kondoh et al.
patent: 5889828 (1999-03-01), Miyashita et al.
patent: 5901101 (1999-05-01), Suzuki et al.
patent: 6125217 (2000-09-01), Paniccia et al.
patent: 6166990 (2000-12-01), Ooishi et al.
patent: 6175526 (2001-01-01), Morgan
patent: 6260175 (2001-07-01), Basel
patent: 6305001 (2001-10-01), Graef
patent: 6324118 (2001-11-01), Ooishi
patent: 6701507 (2004-03-01), Srinivasan
patent: 7078928 (2006-07-01), Sahara et al.
patent: 2002/0157066 (2002-10-01), Marshall et al.
Naveed A. Sherwani, Algorithms for VLSI Physical Design Automation, Third Edition, Springer, Nov. 30, 1998, pp. 417-429.

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