{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/33334"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/33334","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"An improved sigma-delta modulator for digitizing carrier band measurements","abstract":"Draper Laboratory currently employs a third-order Sigma-Delta modulator to digitize the outputs from microelectromechanical sensors at the intermediate frequency prior to demodulation inside a field programmable gate array. This modulator, which is built on a .5[mu]m CMOS process, is to be used as a standalone chip or as a core for use in larger microelectromechanical sensor integrated circuits. In this document, I submit the design of an improved Sigma-Delta modulator, which has a noise floor of 40nV/ [square root of] Hz and a 5Vpp input range.","abstract_html":"Draper Laboratory currently employs a third-order Sigma-Delta modulator to digitize the outputs from microelectromechanical sensors at the intermediate frequency prior to demodulation inside a field programmable gate array. This modulator, which is built on a .5[mu]m CMOS process, is to be used as a standalone chip or as a core for use in larger microelectromechanical sensor integrated circuits. In this document, I submit the design of an improved Sigma-Delta modulator, which has a noise floor of 40nV/ [square root of] Hz and a 5Vpp input range.","abstract_has_math":false,"creators":["Puskarich, John Gerard"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. 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