'Logical effort' presentation slideshows

Speed and Power Trade-offs : Applied to Adder Design:

Speed and Power Trade-offs : Applied to Adder Design:. Vojin G. Oklobdzija, Ram Krishnamurthy Intel AMR / ACSEL Laboratory Intel Corp/ University of California Davis www.ece.ucdavis.edu/acsel. From: Tutorial Presentation 16 th International Symposium on Computer Arithmetic

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Introduction to CMOS VLSI Design Lecture 5: Logical Effort

Introduction to CMOS VLSI Design Lecture 5: Logical Effort. David Harris Harvey Mudd College Spring 2004. Outline. Introduction Delay in a Logic Gate Multistage Logic Networks Choosing the Best Number of Stages Example Summary. Introduction.

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Introduction to CMOS VLSI Design Lecture 5: Logical Effort

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Lecture 4 : Delay Optimization and Logical Effort

Lecture 4 : Delay Optimization and Logical Effort. Outline. RC Delay Models Delay Estimation Logical Effort Delay in a Logic Gate Multistage Logic Networks Choosing the Best Number of Stages Example s Summary. Delay Definitions. t pdr : rising propagation delay

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EEC 118 Lecture #7: Designing with Logical Effort

EEC 118 Lecture #7: Designing with Logical Effort. Rajeevan Amirtharajah University of California, Davis Jeff Parkhurst Intel Corporation. Announcements. Lab 3 this week at lab section HW 3 due this Friday at 4 PM in box, Kemper 2131 Quizzes will be handed back in lab section. Outline.

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EE466: VLSI Design Lecture 8: Combinational Circuits

EE466: VLSI Design Lecture 8: Combinational Circuits. Outline. Bubble Pushing Compound Gates Logical Effort Example Input Ordering Asymmetric Gates Skewed Gates Best P/N ratio. Example 1. MULTIPLEXER 1) Sketch a design using AND, OR, and NOT gates. Example 1. MULTIPLEXER

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Introduction

Introduction. Chip designers face a bewildering array of choices What is the best circuit topology for a function? How many stages of logic give least delay? How wide should the transistors be? Logical effort is a method to make these decisions Uses a simple model of delay

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Lecture 6: Logical Effort

Lecture 6: Logical Effort. Outline. Logical Effort Delay in a Logic Gate Multistage Logic Networks Choosing the Best Number of Stages Example Summary. Introduction. Chip designers face a bewildering array of choices What is the best circuit topology for a function?

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MICROELETTRONICA

MICROELETTRONICA. Logical Effort and delay Lection 4. Outline. Introduction Delay in a Logic Gate Multistage Logic Networks Choosing the Best Number of Stages Example Summary. Introduction. The designer faces many choices :

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Lecture 8: SPICE Simulation

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Lecture 8: SPICE Simulation

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Logical Effort A Method to Optimize Circuit Topology

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Logical Effort

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Lecture 9: Combinational Circuit Design

Lecture 9: Combinational Circuit Design. Outline. Bubble Pushing Compound Gates Logical Effort Example Input Ordering Asymmetric Gates Skewed Gates Best P/N ratio. Example 1. module mux(input s, d0, d1, output y); assign y = s ? d1 : d0; endmodule

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Final Exam Review

Final Exam Review. word0 is high if A2 A1 A0 = 000. logical effort of each input is (1+3.5)/3 per wordline output. word7 is high if A2 A1 A0 = 111. Skewed gates. HI-skew g u = 2.5/3 = 5/6 g d = 2.5/1.5 = 5/3 g avg = 5/4 p = 2.5/3 = 5/6.

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Design and Implementation of VLSI Systems (EN0160)

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Design and Implementation of VLSI Systems (EN1600) Lecture 13: Logical Effort (2/2)

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Logical Effort and Transistor Sizing

Logical Effort and Transistor Sizing. Digital designs are usually expected to operate at high frequencies, thus designers often have to choose the fastest circuit topology and gate sizes for a particular logic function.

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