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Lecture11-MOS_Cap_Delay-6up

Lecture11-MOS_Cap_Delay-6up - EE141-Fall 2010 Digital...

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EE141 1 EECS141 1 Lecture #11 EE141 EE141- Fall 2010 Fall 2010 Digital Integrated Digital Integrated Circuits Circuits Lecture 11 Lecture 11 MOS Capacitance MOS Capacitance and Delay and Delay EE141 2 EECS141 2 Lecture #11 Announcements Announcements No lab Fri., Mon. Labs restart next week Midterm #1 Thurs. Oct. 7 th , 6:30-8:00pm Exam is open notes, book, calculators, etc. EE141 3 EECS141 3 Lecture #11 Class Material Class Material Last lecture Using the MOS model: Inverter VTC Today’s lecture MOS Capacitance Using the MOS Model: Delay Reading (3.3.2, 5.4.2) EE141 4 EECS141 4 Lecture #11 MOS Capacitance MOS Capacitance EE141 5 EECS141 5 Lecture #11 C GD C GS C SB C DB C GB MOS Capacitances MOS Capacitances = C GCS + C GSO = C GCD + C GDO = C GCB = C diff G S D B = C diff EE141 6 EECS141 6 Lecture #11 Gate Capacitance Capacitance (per area) from gate across the oxide is W·L·C ox , where C ox = ε ox /t ox
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