An 8-b cascaded folding A/D converter with a new fully differential source follower

Inkyung Hwang, Daehyuk Kim, Ji Hyun Roh, Mun Kyo Lee, Sun Phil Nah, Minkyu Song

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

Conventionally, source followers have been used at the block of track-and-hold amplifiers (THA) for highspeed medium-bit analog-to-digital converters (ADCs). Even though the input signals of an ADC are fully differential, two single-ended source followers should be normally used. This is because differential source followers have some drawbacks. In this study, a wideband fully differential source follower is presented to obtain maximum efficiency of a fully differential THA. Because a cross coupling technique at the differential nodes is adopted, the performance of the proposed source follower is superior to the performance of conventional followers. The result of Spurious Free Dynamic Range(SFDR) is -66.92dBc for Fin=F s/2 at FS=500MHz. The SFDR of the proposed source follower is better by about 8.6dB than the SFDR of a conventional source follower under the same experimental conditions. To verify them, an 8-b cascaded folding ADC which includes the proposed source follower is fabricated with a 0.13um CMOS technology.

Original languageEnglish
Title of host publication2013 European Conference on Circuit Theory and Design, ECCTD 2013 - Proceedings
PublisherIEEE Computer Society
ISBN (Print)9783000437854
DOIs
StatePublished - 2013
Event2013 European Conference on Circuit Theory and Design, ECCTD 2013 - Dresden, Germany
Duration: 8 Sep 201312 Sep 2013

Publication series

Name2013 European Conference on Circuit Theory and Design, ECCTD 2013 - Proceedings

Conference

Conference2013 European Conference on Circuit Theory and Design, ECCTD 2013
Country/TerritoryGermany
CityDresden
Period8/09/1312/09/13

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