ESE370: Circuit-Level Modeling, Design, and Optimization for Digital
ESE370: Circuit-Level Modeling, Design, and Optimization for Digital Systems Day 21: October 28, 2011 Distributed RC Delay Penn ESE370 Fall2011 -- DeHon 1
Today Estimate delay in RC Network Elmore delay calculation Wire Delay Penn ESE370 Fall2011 -- DeHon 2 What is response?
Penn ESE370 Fall2011 -- DeHon 3 What is response? Penn ESE370 Fall2011 -- DeHon 4 What is response?
Penn ESE370 Fall2011 -- DeHon 5 SPICE Response Penn ESE370 Fall2011 -- DeHon 6 What is response?
Penn ESE370 Fall2011 -- DeHon 7 SPICE Response Penn ESE370 Fall2011 -- DeHon 8 Intuition Look at series of Rs on path
Must move Q=V(C) across each R Not as much as if both Rs precede Cs Penn ESE370 Fall2011 -- DeHon 9 Elmore Delay For each resistor Ri in path Compute CRi = sum of all Cs downstream of Ri Delay through Ri is RiCRi
Delay = Ri path i Penn ESE370 Fall2011 -- DeHon C j path j 10
Superposition Penn ESE370 Fall2011 -- DeHon 11 Superposition R1 C1
R2 C2 R2 R1 C1 Penn ESE370 Fall2011 -- DeHon R1
C2 12 Superposition R1*C1 (R1+R2)*C2 R1
C1 R2 C2 R2 R1 C1 Penn ESE370 Fall2011 -- DeHon
R1 C2 R1*(C1+C2)+R2*C2 13 Superposition not concurrent Dont happen concurrently since must divide current
Penn ESE370 Fall2011 -- DeHon 14 Superposition For R1=R2=R, C1=C2=C Delay = 3RC R2 R1
Total 0.75 L2 Drive L/2 L/2 Receive L/2 Penn ESE370 Fall2011 -- DeHon
33 Admin Project Due next Friday Baseline done; many ideas on what to do Starting to optimize. Now dig into optimization and design-space exploration Midterm 2: Nov. 9th Wednesday, 1.5 week, in evening
Penn ESE370 Fall2011 -- DeHon 34 Idea Lumped wiring calculation is pessimistic Not all capacitance at end of wire Elmore delay calculation allows us to estimate Wires are distributed RC Half delay lumped calculation
Still quadratic in length Penn ESE370 Fall2011 -- DeHon 35
Hydrosere Halosere The term Halosere is an ecological term which describes succession in a saline environment. An example of a halosere would be a salt marsh. In river estuaries, large amounts of silt are deposited by the ebbing tides and...
Martyn 23. Problem didn't surface until he moved in with his girlfriend. She noticed that he would wake with a start - seemed scared - sit bolt upright, get out of bed and walk to the window. Stand there looking...
Messaggi chiave per i medici In Europa la resistenza agli antibiotici costituisce un problema di salute pubblica sempre più grave.1,2 Sebbene il numero delle infezioni dovute a batteri antibiotico-resistenti sia in aumento, gli studi per ricercare e sviluppare nuovi antibiotici...
is one of many taxonomies of learning. It can be a helpful tool in unpacking what we mean by "learning." Bloom separates learning into six levels of increasing cognitive complexity - starting with the lowest level - knowledge, or what...
Based on November 4, 2016 property tax rolls, 46,862 accounts were exempt out of a total of 764,880 accounts in Houston. The appraised value of these exempt accounts (excluding government) is $12.1 billion - with $11 billion in value attributed...
Kid's Day at the Festival. These online informational tools, activities and events were created to assist with your overall experience during "Kid's Day at the Festival".. We hope you find the activities and information entertaining and informative.
Using Online Discussion in Blackboard By Andreas Brockhaus Educational Technologist UW, Bothell Topics Discussion Overview Creating Forums Creating Threads Creating Archives Discussion Tips Discussion Overview Encourages active interaction with concepts, topics outside of the classroom Can be used to prepare...
Can help with cash flow management. ... - Required proof of identity: Social Security card, or Pay stub with Social Security . Number, or W2 form - Required proof of address. Driver's license, or Rental or lease agreement/house deed,
Ready to download the document? Go ahead and hit continue!