Lecture3-Inverter_Metrics-6up

Lecture3-Inverter_Metrics-6up - EE141-Fall 2010 Digital...

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EE141 1 EECS141 1 Lecture #3 EE141 EE141 -Fall 2010 Fall 2010 Digital Integrated Digital Integrated Circuits Circuits Lecture 3 Lecture 3 Switches, Inverters, Switches, Inverters, and Design Metrics and Design Metrics EE141 2 EECS141 2 Lecture #3 Administrative Stuff Administrative Stuff ± Discussions start tomorrow (Fri.) ² (Next Mon. is Labor Day – may shift Mon. discussion to Fri. afternoon) ± Labs start next week ² Everyone should have an EECS instructional account ± Homework #1 is due today ± Homework #2 due next Thursday EE141 3 EECS141 3 Lecture #3 Class Material Class Material ± Last lecture ² Basics of IC manufacturing, cost ± Today’s lecture ² Transistor as switches ² Building an inverter ² Design metrics EE141 4 EECS141 4 Lecture #3 What is a Transistor? What is a Transistor? | V GS | An MOS Transistor |V GS | | V T | SD R on A Switch! G EE141 5 EECS141 5 Lecture #3 Switch Model of MOS Transistor Switch Model of MOS Transistor | V GS | G |V GS | < | V T || V GS | > | V T | R on G G EE141 6 EECS141 6 Lecture #3 NMOS and PMOS V GS > 0 G V GS < 0 G NMOS Transistor PMOS Transistor
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EE141 7 EECS141 7 Lecture #3 Building a CMOS inverter Building a CMOS inverter EE141 8 EECS141 8 Lecture #3 Design Metrics Design Metrics ± How to evaluate performance of a digital circuit (gate, block, …)? ² Cost ² Reliability ² Speed/Performance (delay, frequency) ² Power EE141 9 EECS141 9 Lecture #3 Reliability Reliability ± The real world is analog ² All physical quantities you deal with as a circuit designer are actually continuous ± Thus, even a “digital” signal can be noisy: i ( t ) Inductive coupling Capacitive coupling Power and ground noise v( t ) V DD EE141 10 EECS141 10 Lecture #3
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Lecture3-Inverter_Metrics-6up - EE141-Fall 2010 Digital...

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