panel session tp -tu3 high-speed channel designs ibis ami ......kumar c keshavan . designcon 2009 ....
TRANSCRIPT
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Kumar C Keshavan Designcon 2009 February 3, 2009
Panel Session TP-TU3 High-speed Channel Designs IBIS AMI Solution
![Page 2: Panel Session TP -TU3 High-speed Channel Designs IBIS AMI ......Kumar C Keshavan . Designcon 2009 . February 3, 2009 . Panel Session TP -TU3 High-speed Channel Designs IBIS AMI Solution](https://reader035.vdocuments.us/reader035/viewer/2022081406/5f0fe2e17e708231d4465ff7/html5/thumbnails/2.jpg)
2 © 2012 Cadence Design Systems, Inc. All rights reserved.
• Modeling of Equalization schemes including FFE, DFE • Representing Clock and Data Recovery • Computing Bit Error Rates == High Simulation Performance • Architectural Exploration
Challenges
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3 © 2012 Cadence Design Systems, Inc. All rights reserved.
• Addressed device modeling challenges • Enables pre Architectural level Exploration and post layout • Already prevalent in IC design houses • IBIS Version 5(Aug 2008) includes AMI Modeling support • IBIS AMI Models are interoperable
Algorithm Level Modeling
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4 © 2012 Cadence Design Systems, Inc. All rights reserved.
AMI – key concepts
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5 © 2012 Cadence Design Systems, Inc. All rights reserved.
• EDA tools leverage/build on existing infrastructure • Tx/Rx will still require an analog I/O front end model
IBIS AMI Analog Channel
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6 © 2012 Cadence Design Systems, Inc. All rights reserved.
• AMI Models are Executable “blackbox” • Platform dependent • One AMI model/device • Accompanied by Parameter Definition File
AMI Model Section
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7 © 2012 Cadence Design Systems, Inc. All rights reserved.
IBIS AMI Data Flow API
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8 © 2012 Cadence Design Systems, Inc. All rights reserved.
IBIS AMI-What it does and does not
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9 © 2012 Cadence Design Systems, Inc. All rights reserved.
• AMI Models being developed and delivered by various ic vendors
• EDA tools need to support ami • Models are available so far through nda
AMI Status
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10 © 2012 Cadence Design Systems, Inc. All rights reserved.
AMI in action
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11 © 2012 Cadence Design Systems, Inc. All rights reserved.
AMI FFE
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12 © 2012 Cadence Design Systems, Inc. All rights reserved.
FFE + DFE
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13 © 2012 Cadence Design Systems, Inc. All rights reserved.
AMI Models enable practical design space exploration
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14 © 2012 Cadence Design Systems, Inc. All rights reserved.
Design Space
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15 © 2012 Cadence Design Systems, Inc. All rights reserved.
AMI optimizes tap coefficient
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• AMI Modeling is here – Essential for serial link analysis
• Pre and post layout • Increasing model availability • EDA tools support AMI
Final Thoughts
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17 © 2012 Cadence Design Systems, Inc. All rights reserved.