ULPD and CPTL Pull-Up Stages for Differential Cascode Voltage Switch Logic

Two new structures for Differential Cascode Voltage Switch Logic (DCVSL) pull-up stage are proposed. In conventional DCVSL structure, low-to-high propagation delay is larger than high-to-low propagation delay this could be brought down by using DCVSL-R. Promoting resistors in DCVSL-R structure incre...

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Main Authors: Avireni Srinivasulu, Madugula Rajesh
Format: Article
Language:English
Published: Wiley 2013-01-01
Series:Journal of Engineering
Online Access:http://dx.doi.org/10.1155/2013/595296
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author Avireni Srinivasulu
Madugula Rajesh
author_facet Avireni Srinivasulu
Madugula Rajesh
author_sort Avireni Srinivasulu
collection DOAJ
description Two new structures for Differential Cascode Voltage Switch Logic (DCVSL) pull-up stage are proposed. In conventional DCVSL structure, low-to-high propagation delay is larger than high-to-low propagation delay this could be brought down by using DCVSL-R. Promoting resistors in DCVSL-R structure increase the parasitic effects and unavoidable delay and it also occupies more area on the chip (Turker et al., 2011). In order to minimize these problems, a new Ultra-Low-Power Diode (ULPD) structures in place of resistors have been suggested. This provides the minimum parasitic effects and reduces area on the chip. Second proposed circuit uses Complementary Pass Transistor Logic (CPTL) structure, which provides complementary outputs. This contributes an alternate circuit for conventional DCVSL structure. The performances of the proposed circuits are examined using Cadence and the model parameters of a 180 nm CMOS process. The simulation results of these two circuits are compared and presented. These circuits are found to be suitable for VLSI implementation.
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spelling doaj-art-acc67690a08b439bbf2a49a4b93e93752025-08-20T02:20:23ZengWileyJournal of Engineering2314-49042314-49122013-01-01201310.1155/2013/595296595296ULPD and CPTL Pull-Up Stages for Differential Cascode Voltage Switch LogicAvireni Srinivasulu0Madugula Rajesh1School of Electronics, Vignan University, Vadlamudi, Guntur 522213, IndiaSchool of Electronics, Vignan University, Vadlamudi, Guntur 522213, IndiaTwo new structures for Differential Cascode Voltage Switch Logic (DCVSL) pull-up stage are proposed. In conventional DCVSL structure, low-to-high propagation delay is larger than high-to-low propagation delay this could be brought down by using DCVSL-R. Promoting resistors in DCVSL-R structure increase the parasitic effects and unavoidable delay and it also occupies more area on the chip (Turker et al., 2011). In order to minimize these problems, a new Ultra-Low-Power Diode (ULPD) structures in place of resistors have been suggested. This provides the minimum parasitic effects and reduces area on the chip. Second proposed circuit uses Complementary Pass Transistor Logic (CPTL) structure, which provides complementary outputs. This contributes an alternate circuit for conventional DCVSL structure. The performances of the proposed circuits are examined using Cadence and the model parameters of a 180 nm CMOS process. The simulation results of these two circuits are compared and presented. These circuits are found to be suitable for VLSI implementation.http://dx.doi.org/10.1155/2013/595296
spellingShingle Avireni Srinivasulu
Madugula Rajesh
ULPD and CPTL Pull-Up Stages for Differential Cascode Voltage Switch Logic
Journal of Engineering
title ULPD and CPTL Pull-Up Stages for Differential Cascode Voltage Switch Logic
title_full ULPD and CPTL Pull-Up Stages for Differential Cascode Voltage Switch Logic
title_fullStr ULPD and CPTL Pull-Up Stages for Differential Cascode Voltage Switch Logic
title_full_unstemmed ULPD and CPTL Pull-Up Stages for Differential Cascode Voltage Switch Logic
title_short ULPD and CPTL Pull-Up Stages for Differential Cascode Voltage Switch Logic
title_sort ulpd and cptl pull up stages for differential cascode voltage switch logic
url http://dx.doi.org/10.1155/2013/595296
work_keys_str_mv AT avirenisrinivasulu ulpdandcptlpullupstagesfordifferentialcascodevoltageswitchlogic
AT madugularajesh ulpdandcptlpullupstagesfordifferentialcascodevoltageswitchlogic