AC07_MerajiR_LundUniversity

AC07_MerajiR_LundUniversity - Physical Implementation of...

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Physical Implementation of Analog Circuits Assisted by Conventional Digital Place and Route Methods Reza Meraji , Yasser Sherazi, Joachim Rodrigues Circuit and systems, Dept. Of Electrical and Information Technology, Lund University 2011-05-05 1 CDNLive! EMEA 2011 udU es t y
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Outline • Introduction custom design case study: Analog channel decoder A custom design case study: Analog channel decoder • Briefly about analog decoding concept •P h ysical implementation challenges • Proposed physical implementation flow • Import/Export designs between the CAD tools Abstract view generation • Auto-routing of analog blocks An example with a complete digital design • Conclusions 2011-05-05 2 CDNLive! EMEA 2011
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About the Authors Reza Meraji , PhD student: working on analog implementaions of ultra low power channel decoders Yasser Sherazi , hD student : PhD student : Working on ultra low power sub-threshold digital designs oachim Rodrigues Joachim Rodrigues Assistant prof., working on sub-threshold modeling in ASIC fabrication Digital ASIC design Dept. of Electrical and Information Technology, Lund University, Sweden: 2 professors, 1 assistant professor, 1 postdoc, 8 PhD students 2011-05-05 CDNLive! EMEA 2011 3
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Project Wireless Comunication for Ultra Portable Devices SSF Project granted in summer of 2008. 6 sub-projects covering different parts of a low power receiver. The main goal of this project is to design an ultra compact and low power radio that can be used in devices like earing aids, medical implants, and remote sensors. hearing aids, medical implants, and remote sensors. 2011-05-05 CDNLive! EMEA 2011 4
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Why Channel Coding? XaXXa BXaXo LiXa AlpXa Xravo… BXaXXa… Channel Blablabla… formation disturbed during transmission Bravo Lima Alpha Bravo… Transmitter Receiver guesses message Information disturbed during transmission Introduce redundancy (algorithms) coding theory 2011-05-05 CDNLive! EMEA 2011 5
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Case Study Analog Decoding Motivation Digital decoder: Used in various commercial devices to improve BER performance Complex decoding algorithm -> High power consumption Take a large area on chip Analog decoder implementations: At early research stage Potentially outperform digital implementations in both area and power consumption 2011-05-05 CDNLive! EMEA 2011 6
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Case Study Breifly about Analog Decoding Concept: Sum-Product Algorithm In a circular trellis make one forward, , and one backward, , recursion.
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This note was uploaded on 07/09/2011 for the course ECE 2 taught by Professor Nitin during the Spring '11 term at St. Martins.

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AC07_MerajiR_LundUniversity - Physical Implementation of...

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