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ALU Circuit Design Mix Logic Styles Technique

Arithmetic Logic Unit (ALU) is the heart of microprocessor. It is basically a combinational circuit that performs a number of arithmetic and logic functions. Hence, its performance is crucial for the design of high performance digital computer system.For the past two decades, Complementary Metal Oxi...

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Main Author: Lee, Seng Siong
Format: Thesis
Language:English
English
Published: 2004
Online Access:http://psasir.upm.edu.my/id/eprint/168/1/549501_t_fk_2004_11.pdf
http://psasir.upm.edu.my/id/eprint/168/
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spelling my.upm.eprints.1682013-05-27T06:46:11Z http://psasir.upm.edu.my/id/eprint/168/ ALU Circuit Design Mix Logic Styles Technique Lee, Seng Siong Arithmetic Logic Unit (ALU) is the heart of microprocessor. It is basically a combinational circuit that performs a number of arithmetic and logic functions. Hence, its performance is crucial for the design of high performance digital computer system.For the past two decades, Complementary Metal Oxide Semiconductor (CMOS) has been the dominant logic style in digital logic design. Its success is mainly contributed by the low power dissipation, compact design, adequately high speed, simple circuitry and robustness against transistor and voltage scaling properties.However, the advancement of digital computer technology has requires higher circuit speed. Thus, alternative logic styles need to be found. Complementary Pass-transistor Logic (CPL) proved to be a viable alternative to CMOS logic. Its strength lies in the absence of slow PMOS transistors in the logic path, low input capacitance and higher speed.A performance comparison had been made between CMOS and CPL logic styles. Logic units and arithmetic units had been designed and compared of their performance in circuit delay, power dissipation and circuit size. Measurement results had showed that CMOS is dominant in simple monotonic logic gates, while CPL performs better for more complex circuit such as multiplexer and arithmetic units. 4-bits ALU is design using full CMOS logic style and also mix logic styles (using the best of both CMOS and CPL). Mix logic styles 4-bits ALU has 76% less power dissipation compared to full CMOS implementation 4-bits ALU. It also has higher speed than full CMOS design but with some marginal increase in circuit size. Hence, mix logic styles has proved to be a viable alternative to full CMOS design for high performance ALU and other digital logic designs. 2004-01 Thesis NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/168/1/549501_t_fk_2004_11.pdf Lee, Seng Siong (2004) ALU Circuit Design Mix Logic Styles Technique. Masters thesis, Universiti Putra Malaysia. English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description Arithmetic Logic Unit (ALU) is the heart of microprocessor. It is basically a combinational circuit that performs a number of arithmetic and logic functions. Hence, its performance is crucial for the design of high performance digital computer system.For the past two decades, Complementary Metal Oxide Semiconductor (CMOS) has been the dominant logic style in digital logic design. Its success is mainly contributed by the low power dissipation, compact design, adequately high speed, simple circuitry and robustness against transistor and voltage scaling properties.However, the advancement of digital computer technology has requires higher circuit speed. Thus, alternative logic styles need to be found. Complementary Pass-transistor Logic (CPL) proved to be a viable alternative to CMOS logic. Its strength lies in the absence of slow PMOS transistors in the logic path, low input capacitance and higher speed.A performance comparison had been made between CMOS and CPL logic styles. Logic units and arithmetic units had been designed and compared of their performance in circuit delay, power dissipation and circuit size. Measurement results had showed that CMOS is dominant in simple monotonic logic gates, while CPL performs better for more complex circuit such as multiplexer and arithmetic units. 4-bits ALU is design using full CMOS logic style and also mix logic styles (using the best of both CMOS and CPL). Mix logic styles 4-bits ALU has 76% less power dissipation compared to full CMOS implementation 4-bits ALU. It also has higher speed than full CMOS design but with some marginal increase in circuit size. Hence, mix logic styles has proved to be a viable alternative to full CMOS design for high performance ALU and other digital logic designs.
format Thesis
author Lee, Seng Siong
spellingShingle Lee, Seng Siong
ALU Circuit Design Mix Logic Styles Technique
author_facet Lee, Seng Siong
author_sort Lee, Seng Siong
title ALU Circuit Design Mix Logic Styles Technique
title_short ALU Circuit Design Mix Logic Styles Technique
title_full ALU Circuit Design Mix Logic Styles Technique
title_fullStr ALU Circuit Design Mix Logic Styles Technique
title_full_unstemmed ALU Circuit Design Mix Logic Styles Technique
title_sort alu circuit design mix logic styles technique
publishDate 2004
url http://psasir.upm.edu.my/id/eprint/168/1/549501_t_fk_2004_11.pdf
http://psasir.upm.edu.my/id/eprint/168/
_version_ 1643821751926259712
score 13.211869

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