Lecture14-ComplexCMOSCntd

Lecture14-ComplexCMOSCntd - EE141 EE141 EECS141 Lecture #14...

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EE141 1 EE141 EECS141 1 Lecture #14 EE141 EECS141 2 Lecture #14 Hw 5 due Today. Hw 6 posted early next week. You get TWO weeks for this one. Project phase 1 will be launched today Out of town next week We lecture offered by Stanley Fr lecture cancelled – Make-up on Tu March 16 at 3:30pm
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EE141 2 EE141 EECS141 3 Lecture #14 Last lecture Inverter energy Project launch Today’s lecture Optimizing complex CMOS Pass Transistor Logic Reading (Ch 5, 6) EE141 EECS141 4 Lecture #13
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EE141 3 EE141 EECS141 5 Lecture #13 Techniques very similar to the inverter case Logical Effort technique as the means for gate sizing and topology optimization However … some other things to be aware of EE141 EECS141 6 Lecture #13 D C B A D: 0 1 C: 1 B: 1 A: 1 C L C 3 C 2 C 1 RC model: 2 2 2 2 4 4 4 4
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4 EE141 EECS141 7 Lecture #13 D C B A D C B A C L C 3 C 2 C 1 Distributed RC model (Elmore delay) t pHL = 0.69 R eqn (C 1 +2C 2 +3C 3 +4C L ) Propagation delay deteriorates rapidly as a function of fan-in – quadratically in the worst case. 2 2 2 2 4 4 4 4 EE141 EECS141 8 Lecture #13 t p (psec) fan-in Gates with a fan-in greater than 4 should be avoided. t
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This note was uploaded on 02/06/2011 for the course EE 141 taught by Professor Staff during the Spring '08 term at Berkeley.

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Lecture14-ComplexCMOSCntd - EE141 EE141 EECS141 Lecture #14...

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