ece546fall11_03

ece546fall11_03 - ECE ECE 546 - VLSI Systems Design Lecture...

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ECE 546 ECE 546 - VLSI Systems Design VLSI Systems Design ecture 3: ecture 3: nergy Power nergy Power Lecture 3: Lecture 3: Energy, Power, Energy, Power, and Quality Metrics Fall Fall 2011 2011 W. Rhett Davis NC State University ith significant material from ith significant material from abaey abaey handrakasan handrakasan and and ikoli ć Slide 1 © W. Rhett Davis NC State University ECE 546 Fall 2011 with significant material from with significant material from Rabaey Rabaey, , Chandrakasan Chandrakasan, and , and Nikoli Nikoli
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Announcements HW#1 Due Tuesday Teaching Assistants » Shiney Gupta – Office hours Mon. 2:35-3:55 arun emircioglu ffice hours TBA » Harun Demircioglu Office hours TBA uestion: Post slides in PPT or PDF? Question: Post slides in PPT or PDF? » Free Foxit reader allows note-taking in PDFs Slide 2 © W. Rhett Davis NC State University ECE 546 Fall 2011
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Summary of Last Lecture How do we define V OL ,V OH ,V M , V IL , and V IH ? What effect does transistor width have on V ? M xplain in simple terms how to calculate Explain in simple terms how to calculate R eq and propagation delay (t p ) Slide 3 © W. Rhett Davis NC State University ECE 546 Fall 2011
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Today’s Lecture Propagation Delay, Rise & Fall Times (5.4.2) Dynamic Power (5.5.1) Quality Measures (PDP & EDP) (5.5.3) Short-Circuit Power (5.5.1) Static Power (5.5.2) Slide 4 © W. Rhett Davis NC State University ECE 546 Fall 2011
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Inverter Transient Response 3 2 2.5 1 1.5 V out (V) t pHL t pLH 0.5 0 1 2 10 -10 -0.5 0 t (sec) Slide 5 © W. Rhett Davis NC State University ECE 546 Fall 2011 x 10
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The Transistor as a Switch V GS V T R on I D V GS = V DD S D R mid V DS R 0 V DD /2 V DD DD DD q N V V R R 2 / 1 Slide 6 © W. Rhett Davis NC State University ECE 546 Fall 2011     DD GS DD DS D DD GS DD DS D eq ON V V V V I V V V V I , 2 / , 2
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Propagation Delay Vout R eqn C L 2 / ) ( DD C R t DD out V e V t V L n eq 2 1 L n eq C R t e 9 ( L eq L eq p C R C R t n n HL 69 . 0 ) 2 ln( LH p t Slide 7 © W. Rhett Davis NC State University ECE 546 Fall 2011   LH HL p p p t t t 2 1
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Rise and Fall Times Usually measured as e 10% 0% times the 10%-90% times » Why?
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ece546fall11_03 - ECE ECE 546 - VLSI Systems Design Lecture...

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