Modified Tang and Pun’s Current Comparator and Its Application to Full Flash and Two-Step Flash Current Mode ADCs
A modification to an existing current comparator proposed by Tang and Pun has been presented. The circuit introduces a flipped voltage follower (FVF) which replaces the source follower input stage of the existing current comparator of Tang and Pun. This modification culminates into higher speed espe...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Journal of Electrical and Computer Engineering |
| Online Access: | http://dx.doi.org/10.1155/2017/8245181 |
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| author | Veepsa Bhatia Neeta Pandey |
| author_facet | Veepsa Bhatia Neeta Pandey |
| author_sort | Veepsa Bhatia |
| collection | DOAJ |
| description | A modification to an existing current comparator proposed by Tang and Pun has been presented. The circuit introduces a flipped voltage follower (FVF) which replaces the source follower input stage of the existing current comparator of Tang and Pun. This modification culminates into higher speed especially at lower currents and lower power dissipation. The application of the proposed current comparator has also been put forth by implementing a 3-bit current mode (CM) ADC and a two-step 3-bit CM ADC. The theoretical propositions are verified through spice simulation using 0.18 μm TSMC CMOS technology at a power supply of 1.8 V. Propagation delay, power dissipation, and power delay product (PDP) have been calculated for the proposed current comparator and process parameter variation has been studied. For both the implementations of ADCs, performance parameters, namely, DNL, INL, missing codes, monotonicity, offset, and gain errors, have been evaluated. |
| format | Article |
| id | doaj-art-607c49e141244d808ca370b16289f26b |
| institution | Kabale University |
| issn | 2090-0147 2090-0155 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Electrical and Computer Engineering |
| spelling | doaj-art-607c49e141244d808ca370b16289f26b2025-02-03T01:06:15ZengWileyJournal of Electrical and Computer Engineering2090-01472090-01552017-01-01201710.1155/2017/82451818245181Modified Tang and Pun’s Current Comparator and Its Application to Full Flash and Two-Step Flash Current Mode ADCsVeepsa Bhatia0Neeta Pandey1Department of ECE, Indira Gandhi Delhi Technical University for Women, Delhi, IndiaDepartment of ECE, Delhi Technological University, Delhi, IndiaA modification to an existing current comparator proposed by Tang and Pun has been presented. The circuit introduces a flipped voltage follower (FVF) which replaces the source follower input stage of the existing current comparator of Tang and Pun. This modification culminates into higher speed especially at lower currents and lower power dissipation. The application of the proposed current comparator has also been put forth by implementing a 3-bit current mode (CM) ADC and a two-step 3-bit CM ADC. The theoretical propositions are verified through spice simulation using 0.18 μm TSMC CMOS technology at a power supply of 1.8 V. Propagation delay, power dissipation, and power delay product (PDP) have been calculated for the proposed current comparator and process parameter variation has been studied. For both the implementations of ADCs, performance parameters, namely, DNL, INL, missing codes, monotonicity, offset, and gain errors, have been evaluated.http://dx.doi.org/10.1155/2017/8245181 |
| spellingShingle | Veepsa Bhatia Neeta Pandey Modified Tang and Pun’s Current Comparator and Its Application to Full Flash and Two-Step Flash Current Mode ADCs Journal of Electrical and Computer Engineering |
| title | Modified Tang and Pun’s Current Comparator and Its Application to Full Flash and Two-Step Flash Current Mode ADCs |
| title_full | Modified Tang and Pun’s Current Comparator and Its Application to Full Flash and Two-Step Flash Current Mode ADCs |
| title_fullStr | Modified Tang and Pun’s Current Comparator and Its Application to Full Flash and Two-Step Flash Current Mode ADCs |
| title_full_unstemmed | Modified Tang and Pun’s Current Comparator and Its Application to Full Flash and Two-Step Flash Current Mode ADCs |
| title_short | Modified Tang and Pun’s Current Comparator and Its Application to Full Flash and Two-Step Flash Current Mode ADCs |
| title_sort | modified tang and pun s current comparator and its application to full flash and two step flash current mode adcs |
| url | http://dx.doi.org/10.1155/2017/8245181 |
| work_keys_str_mv | AT veepsabhatia modifiedtangandpunscurrentcomparatoranditsapplicationtofullflashandtwostepflashcurrentmodeadcs AT neetapandey modifiedtangandpunscurrentcomparatoranditsapplicationtofullflashandtwostepflashcurrentmodeadcs |