Electronic digital logic circuitry – Signal sensitivity or transmission integrity – Output switching noise reduction
Reexamination Certificate
2004-05-17
2008-10-21
Tran, Anh Q (Department: 2819)
Electronic digital logic circuitry
Signal sensitivity or transmission integrity
Output switching noise reduction
C326S027000, C326S031000, C326S032000
Reexamination Certificate
active
07439759
ABSTRACT:
As technology scales, on-chip interconnects are becoming narrower, and the height of such interconnects is not scaling linearly with the width. This leads to an increase of coupling capacitance with neighboring wires, leading to higher crosstalk. It also leads to poor performance due to poor RC response at the receiving of the wire, which may even result in failure in very noisy environments. An adaptive threshold scheme is proposed in which receiver switching thresholds are adjusted according to the detected noise in bus lines. These noise levels are dependent on both the front-end processing (transistor performance) as well as on the backend processing (metal resistance, capacitance, width and spacing). The circuit therefore automatically compensates for process variations.
REFERENCES:
patent: 5565803 (1996-10-01), Fulcomer
patent: 6084433 (2000-07-01), Momtaz
patent: 6894547 (2005-05-01), Takahashi
Garg Manish
Katoch Atul
Seevinck Evert
Veendrick Hendricus Joseph Maria
NXP B.V.
Tran Anh Q
Zawilski Peter
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