Digital Design Q's

http://www.indiabix.com/digital-electronics/digital-design/

chip talk tutorial

http://www.chiptalk.org/modules/wfsection/article.php?articleid=1

soc power design flow

http://eetimes.com/electronics-news/4154748/Reshaping-the-SoC-power-design-flow

STA-1

http://www.scribd.com/doc/53719185/Static-Timing-1

low-power technique

http://www.slideshare.net/shavakmm/lowpowerseminar810

vlsi_pd material

http://vinodkumarnukala.blogspot.in/

Physical design _complete

http://www.scribd.com/doc/76417776/Physical-Design-Complete 

vlsi PD books

http://www.scribd.com/word/removal/94034439

physical design begginer

vlsi-expert.blogspot.com