ece546fall11_05

ece546fall11_05 - ECE ECE 546 - VLSI Systems Design Lecture...

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ECE 546 ECE 546 - VLSI Systems Design VLSI Systems Design ecture ecture : : atchup atchup Lecture Lecture 5: 5: Latchup Latchup, , Analytical Transient, Inverter Sizing 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#2 Due Tuesday Slide 2 © W. Rhett Davis NC State University ECE 546 Fall 2011
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Summary of Last Lecture What are the five capacitances for a MOSFET and how can we calculate them? How do you extract A , A , P , & P S D S D values from the layout? Slide 3 © W. Rhett Davis NC State University ECE 546 Fall 2011
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Today’s Lecture atchup (3 3 3) Latchup (3.3.3) Analytical Transient (5.4 – 5.4.1) Inverter Sizing (5.4.3) Slide 4 © W. Rhett Davis NC State University ECE 546 Fall 2011
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Why are well-contacts necessary? ? Slide 5 © W. Rhett Davis NC State University ECE 546 Fall 2011
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CMOS Latchup Caused by parasitic BJTs in positive feedback High currents can burn out a transistor rimary way to prevent this is to minimize R well R subs Slide 6 © W. Rhett Davis NC State University ECE 546 Fall 2011 Primary way to prevent this is to minimize R nwell & R psubs by putting substrate contacts close to source contacts
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What We Will Require in Our Class
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This note was uploaded on 01/26/2012 for the course EE 546 taught by Professor Whett during the Spring '11 term at N.C. State.

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ece546fall11_05 - ECE ECE 546 - VLSI Systems Design Lecture...

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