Applied VLSI Design

Feb 06, 2026

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This document explores advanced VLSI design approaches, detailing the design of carry skip and look-ahead adders. It emphasizes the replacement of traditional ripple-carry adders with more efficient carry-skip and look-ahead adders to enhance performance. Furthermore, the use of Wallace tree structures for array multipliers is discussed, along with techniques for rounding results to minimize average error. The insights presented aim to improve design efficiency and accuracy in modern VLSI applications. Thank you for your attention.

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Applied VLSI Design

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The third Design of Bjoern Konieczek Applied VLSI Design
Design Approach G R B R G B Y Cb Cr
Carry Skip Look-Ahead Adder Replace Ripple-Carry Adder with Carry Skip Look Ahead Adder
Wallace Tree Replace Carry Save Array Multiplier with Wallace-Tree
Rounding Rounding the Results to improve average Error
Results
Thank YOU For YOUR ATTENTION

Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

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Applied VLSI Design

The third design of Robert Gubitz. Applied VLSI Design . Stage 2 design. Changes since Stage 2. Replace the remaining Carry-Save-Array multipliers with Wallace Tree multipliers Use term sharing for the multipliers Replace Ripple-Carry adders with Carry-Skip look-ahead adders

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Applied VLSI design – Phase 1

Applied VLSI design – Phase 1. Martin Kittel Sebastian Stieber. Our design. Multiplier: 17 x 22 bit Pezaris array multiplier 22 bit signed coefficients 16 bit unsigned pixel value + 1 sign bit (‘0‘) Adder: 39 bit ripple carry adder 1 halfadder 38 fulladder. Multiplier.

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Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design. Course and contest Results of Phase 4 Martin Kittel. Results Phase 3. Slansky Adder Pipeline Depth = 5. Improvements. No changes in the Design Cadence Encounter Aspect Ratio 1:1 has highest frequency

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Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

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Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design. Course and contest Adder structures Sebastian Kruse. Types of adders. Redundant Carry-Save (CSA) Redundant-Binary (RBA) Not redundant (CPA) Ripple-Carry (RCA), Manchester-Carry-Chain (MCC)

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Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

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Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

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Applied VLSI Design

The second Design of Robert Gubitz and Bjoern Konieczek. Applied VLSI Design. First Approach. New Approach. Replace Ripple Look-Ahead Adder with Ripple-Carry Adder. New Approach. Replace Carry Save Array Multiplier with Wallace-Tree. New Approach.

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Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI Design

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Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

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Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

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248 views • 9 slides

Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

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235 views • 6 slides

Applied VLSI Design

The third Design of Bjoern Konieczek. Applied VLSI Design. Design Approach. G. R. B. R. G. B. Y. Cb. Cr. Carry Skip Look-Ahead Adder. Replace Ripple-Carry Adder with Carry Skip Look Ahead Adder. Wallace Tree. Replace Carry Save Array Multiplier with Wallace-Tree. Rounding.

213 views • 7 slides

Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI Design

Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI Design. Jacob Maxa Results of Phase 4: Chip Layout 10.01.2013. Institute MD, University of Rostock. Challenge. Create a fully working chip layout Redo the same task with additional I/O pads Ideas

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Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

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Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design. Differences between FPGA and ASIC René Romann. Institute of Applied Microelectronics and Computer Engineering College of Computer Science and Electrical Engineering, University of Rostock. Slide 1. Overview. FPGA vs. ASIC

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Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

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Applied VLSI Design

The first Design of Robert Gubitz and Bjoern Konieczek. Applied VLSI Design. First approach. Replace equations with a Calculation Unit. Calculation Unit. Calculation Unit (modified). Ripple-Carry-Look-ahead-Adder. Second Approach - Enhancement.

292 views • 9 slides

Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design. Course and contest Results of Phase 4 Robert Mars. Expected Differences. frequency ↓ due to wire delay power ↑ due to wire capacitance Considered Floorplan optimizations : Aspect Ratio Utilization. Aspect Ratio.

208 views • 8 slides

Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

Course and contest Results of Phase <3> <Ayad Mostafa>. Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design. Slide 1. Design and architecture 1. Adders: Carry Lookahead Adder (CLA) Fast Optimization Reduced foot print by limiting addition to 4-bits per stage

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Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design

Spezielle Anwendungen des VLSI – Entwurfs Applied VLSI design. Course and contest Results of Phase 3 Sebastian Kruse. Optimizations. Change of coefficent Now no adder is needed for calculation Look for higher metric at lower voltage area Comparison between different adder types.

237 views • 9 slides

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