Abstract/Details

Circuit and signaling techniques for on -chip interconnects


2004 2004

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Abstract (summary)

As VLSI progresses into Very Deep Submicron (VDSM) realms, global interconnects play an increasingly important role in the overall performance and power consumption of high-performance chips. This thesis proposes circuit and signaling solutions to the on-chip interconnect design problem. Current-sensing and phase coded signaling are proposed as potential techniques to transmit logic in current and time respectively. A test-chip verifying these techniques has been fabricated in a TSMC 0.18μ technology through MOSIS.

Using a novel receiver circuit for differential current-sensing, a performance benefit of 20% was obtained over the delay-optimal repeater insertion technique. The proposed single ended current-sensing provides more delay benefits (45% on average) and like repeaters uses one wire to transmit a data bit. The static power dissipation in current-sensing is mitigated by using transition encoded current-sensing and current-pulse signaling. These techniques are faster and lower power than repeater insertion. A hybrid circuit technique that exploits the advantages of both current-sensing and repeater insertion is proposed.

Phase coding is presented as a multi-bit signaling technique which encodes multiple bits on a single wire in terms of phase information. Transmitting multiple bits saves power and increases bandwidth. DLL based closed loop encoding and decoding schemes provide process-variation immune operation.

Indexing (details)


Subject
Electrical engineering
Classification
0544: Electrical engineering
Identifier / keyword
Applied sciences; Circuit; Interconnects; On-chip; Repeaters; Signaling
Title
Circuit and signaling techniques for on -chip interconnects
Author
Maheshwari, Atul
Number of pages
187
Publication year
2004
Degree date
2004
School code
0118
Source
DAI-B 65/11, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
049613261X, 9780496132614
Advisor
Burleson, Wayne
University/institution
University of Massachusetts Amherst
University location
United States -- Massachusetts
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3152726
ProQuest document ID
305177043
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/305177043
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