{"id":{"repo_id":"greece","oai_identifier":"oai:10442/0460"},"canonical_url":"https://search.dev.ndltd.org/etd/greece/oai:10442/0460","repository":{"repo_id":"greece","name":"Greek National Archive of PhD Theses","base_url":"https://phdtheses.ekt.gr/eadd_oai/request"},"display":{"title":"Η ΧΡΗΣΗ ΤΗΣ ΔΙΑΜΟΡΦΩΣΗΣ Δ-Σ ΣΤΗ ΦΑΣΜΑΤΙΚΗ ΑΝΑΛΥΣΗ ΣΗΜΑΤΩΝ","abstract":"THE PURPOSE OF THE PRESENT THESIS IS TO PROVE THAT THE USE OF Δ- Σ MODULATION LEADS TO VERY SIMPLE CIRCUITRY SPECTRUM ANALYZERS FOR AUDIO SIGNALS. TWO SPECTRUM ANALYZERS ARE PROPOSED: A HYBRID AND A DIGITAL ONE. IN THE FORMER SOME OPERATIONS ARE REALIZED BY ANALOG AND SOME OTHERS BY DIGITAL METHODS, WHILE IN THE LATTER ALL THE OPERATIONS ARE DIGITALLY PERFORMED. THE ANALYZERS ARE TESTED, IN ORDER TO VERIFY THEIR RESPONSE BESIDES THE SIGNAL TO NOISE RATIO, THE RESOLUTIONAND THE SENSITIVITY ARE THEORETICALLY DETERMINED AND EXPERIMENTALLY VERIFIED.","abstract_html":"THE PURPOSE OF THE PRESENT THESIS IS TO PROVE THAT THE USE OF Δ- Σ MODULATION LEADS TO VERY SIMPLE CIRCUITRY SPECTRUM ANALYZERS FOR AUDIO SIGNALS. TWO SPECTRUM ANALYZERS ARE PROPOSED: A HYBRID AND A DIGITAL ONE. IN THE FORMER SOME OPERATIONS ARE REALIZED BY ANALOG AND SOME OTHERS BY DIGITAL METHODS, WHILE IN THE LATTER ALL THE OPERATIONS ARE DIGITALLY PERFORMED. THE ANALYZERS ARE TESTED, IN ORDER TO VERIFY THEIR RESPONSE BESIDES THE SIGNAL TO NOISE RATIO, THE RESOLUTIONAND THE SENSITIVITY ARE THEORETICALLY DETERMINED AND EXPERIMENTALLY VERIFIED.","abstract_has_math":false,"creators":["Γεωργουδής, Ευστράτιος","Georgoudis, Efstratios"],"institution":"Πανεπιστήμιο Πατρών","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1987,"date_issued":"1987","date_published":"1987","updated_at":"2026-07-24T02:25:17Z","subjects":["Digital modulation","Signal processing","Spectrum analysis","Επεξεργασία σήματος","Φασματική ανάλυση","Ψηφιακή διαμόρφωση","Φυσικές Επιστήμες","Natural Sciences","Φυσική","Physical Sciences"],"languages":["gre"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/0460"],"render_values":[{"text":"10.12681/eadd/0460","href":"https://doi.org/10.12681/eadd/0460","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10442/hedi/0460","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Γεωργουδής, Ευστράτιος","Georgoudis, Efstratios"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1987"]},{"key":"dc:publisher","label":"Institution","values":["Πανεπιστήμιο Πατρών","University of Patras"]},{"key":"dc:type","label":"Dc Type","values":["PhD Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Digital modulation","Signal processing","Spectrum analysis","Επεξεργασία σήματος","Φασματική ανάλυση","Ψηφιακή διαμόρφωση","Φυσικές Επιστήμες","Natural Sciences","Φυσική","Physical Sciences"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["gre"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/0460","http://hdl.handle.net/10442/hedi/0460"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["THE PURPOSE OF THE PRESENT THESIS IS TO PROVE THAT THE USE OF Δ- Σ MODULATION LEADS TO VERY SIMPLE CIRCUITRY SPECTRUM ANALYZERS FOR AUDIO SIGNALS. TWO SPECTRUM ANALYZERS ARE PROPOSED: A HYBRID AND A DIGITAL ONE. IN THE FORMER SOME OPERATIONS ARE REALIZED BY ANALOG AND SOME OTHERS BY DIGITAL METHODS, WHILE IN THE LATTER ALL THE OPERATIONS ARE DIGITALLY PERFORMED. THE ANALYZERS ARE TESTED, IN ORDER TO VERIFY THEIR RESPONSE BESIDES THE SIGNAL TO NOISE RATIO, THE RESOLUTIONAND THE SENSITIVITY ARE THEORETICALLY DETERMINED AND EXPERIMENTALLY VERIFIED.","Η ΠΑΡΟΥΣΑ ΔΙΑΤΡΙΒΗ ΕΧΕΙ ΣΤΟΧΟ ΝΑ ΑΠΟΔΕΙΞΕΙ ΟΤΙ Η ΧΡΗΣΗ ΤΗΣ ΔΙΑΜΟΡΦΩΣΗΣ Δ-Σ ΕΙΝΑΙ ΙΚΑΝΗ ΝΑ ΟΔΗΓΗΣΕΙ ΣΤΗ ΣΥΝΘΕΣΗ ΟΛΟΚΛΗΡΩΜΕΝΩΝ ΦΑΣΜΑΤΙΚΩΝ ΑΝΑΛΥΤΩΝ ΑΚΟΥΣΤΙΚΩΝ ΣΗΜΑΤΩΝ. ΕΤΣΙ ΠΡΟΤΕΙΝΟΝΤΑΙ ΔΥΟ ΦΑΣΜΑΤΙΚΟΙ ΑΝΑΛΥΤΕΣ ΕΝΑΣ ΥΒΡΙΔΙΚΗΣ ΚΑΙ ΕΝΑΣ ΨΗΦΙΑΚΗΣ ΜΟΡΦΗΣ. ΣΤΟΝ ΥΒΡΙΔΙΚΟ ΑΝΑΛΥΤΗ ΟΡΙΣΜΕΝΕΣ ΠΡΑΞΕΙΣ ΕΚΤΕΛΟΥΝΤΑΙ ΑΝΑΛΟΓΙΚΑ ΚΑΙ ΟΡΙΣΜΕΝΕΣ ΨΗΦΙΑΚΑ ΕΝΩ ΣΤΟΝ ΨΗΦΙΑΚΟ ΟΛΕΣ ΟΙ ΠΡΑΞΕΙΣ ΕΚΤΕΛΟΥΝΤΑΙ ΨΗΦΙΑΚΑ. Η ΟΡΘΗ ΛΕΙΤΟΥΡΓΙΑ ΤΩΝ ΑΝΑΛΥΤΩΝ ΕΠΙΒΕΒΑΙΩΝΕΤΑΙ ΑΠΟ ΤΑ ΠΕΙΡΑΜΑΤΙΚΑ ΑΠΟΤΕΛΕΣΜΑΤΑ ΠΟΥ ΠΑΡΑΤΙΘΕΝΤΑΙ. ΠΑΡΑΛΛΗΛΑ ΓΙΝΕΤΑΙ ΚΑΙ ΘΕΩΡΗΤΙΚΗ ΜΕΛΕΤΗ ΠΟΥ ΕΠΙΒΕΒΑΙΩΝΕΤΑΙ ΠΕΙΡΑΜΑΤΙΚΑ ΤΩΝ ΧΑΡΑΚΤΗΡΙΣΤΙΚΩΝ ΤΩΝ ΑΝΑΛΥΤΩΝ ΟΠΩΣ ΛΟΓΟΣ ΣΗΜΑΤΟΣ ΠΡΟΣ ΘΟΡΥΒΟ ΔΙΑΚΡΙΤΙΚΗ ΙΚΑΝΟΤΗΤΑ ΚΑΙ ΕΥΑΙΣΘΗΣΙΑ."]},{"key":"dc:title","label":"Title","values":["Η ΧΡΗΣΗ ΤΗΣ ΔΙΑΜΟΡΦΩΣΗΣ Δ-Σ ΣΤΗ ΦΑΣΜΑΤΙΚΗ ΑΝΑΛΥΣΗ ΣΗΜΑΤΩΝ","THE USE OF Δ-Σ MODULATION IN SPECTRAL ANALYSIS"]}]}],"canonical_facts":{"dc:creator":["Γεωργουδής, Ευστράτιος","Georgoudis, Efstratios"],"dc:date":["1987"],"dc:description":["THE PURPOSE OF THE PRESENT THESIS IS TO PROVE THAT THE USE OF Δ- Σ MODULATION LEADS TO VERY SIMPLE CIRCUITRY SPECTRUM ANALYZERS FOR AUDIO SIGNALS. TWO SPECTRUM ANALYZERS ARE PROPOSED: A HYBRID AND A DIGITAL ONE. IN THE FORMER SOME OPERATIONS ARE REALIZED BY ANALOG AND SOME OTHERS BY DIGITAL METHODS, WHILE IN THE LATTER ALL THE OPERATIONS ARE DIGITALLY PERFORMED. THE ANALYZERS ARE TESTED, IN ORDER TO VERIFY THEIR RESPONSE BESIDES THE SIGNAL TO NOISE RATIO, THE RESOLUTIONAND THE SENSITIVITY ARE THEORETICALLY DETERMINED AND EXPERIMENTALLY VERIFIED.","Η ΠΑΡΟΥΣΑ ΔΙΑΤΡΙΒΗ ΕΧΕΙ ΣΤΟΧΟ ΝΑ ΑΠΟΔΕΙΞΕΙ ΟΤΙ Η ΧΡΗΣΗ ΤΗΣ ΔΙΑΜΟΡΦΩΣΗΣ Δ-Σ ΕΙΝΑΙ ΙΚΑΝΗ ΝΑ ΟΔΗΓΗΣΕΙ ΣΤΗ ΣΥΝΘΕΣΗ ΟΛΟΚΛΗΡΩΜΕΝΩΝ ΦΑΣΜΑΤΙΚΩΝ ΑΝΑΛΥΤΩΝ ΑΚΟΥΣΤΙΚΩΝ ΣΗΜΑΤΩΝ. ΕΤΣΙ ΠΡΟΤΕΙΝΟΝΤΑΙ ΔΥΟ ΦΑΣΜΑΤΙΚΟΙ ΑΝΑΛΥΤΕΣ ΕΝΑΣ ΥΒΡΙΔΙΚΗΣ ΚΑΙ ΕΝΑΣ ΨΗΦΙΑΚΗΣ ΜΟΡΦΗΣ. ΣΤΟΝ ΥΒΡΙΔΙΚΟ ΑΝΑΛΥΤΗ ΟΡΙΣΜΕΝΕΣ ΠΡΑΞΕΙΣ ΕΚΤΕΛΟΥΝΤΑΙ ΑΝΑΛΟΓΙΚΑ ΚΑΙ ΟΡΙΣΜΕΝΕΣ ΨΗΦΙΑΚΑ ΕΝΩ ΣΤΟΝ ΨΗΦΙΑΚΟ ΟΛΕΣ ΟΙ ΠΡΑΞΕΙΣ ΕΚΤΕΛΟΥΝΤΑΙ ΨΗΦΙΑΚΑ. Η ΟΡΘΗ ΛΕΙΤΟΥΡΓΙΑ ΤΩΝ ΑΝΑΛΥΤΩΝ ΕΠΙΒΕΒΑΙΩΝΕΤΑΙ ΑΠΟ ΤΑ ΠΕΙΡΑΜΑΤΙΚΑ ΑΠΟΤΕΛΕΣΜΑΤΑ ΠΟΥ ΠΑΡΑΤΙΘΕΝΤΑΙ. ΠΑΡΑΛΛΗΛΑ ΓΙΝΕΤΑΙ ΚΑΙ ΘΕΩΡΗΤΙΚΗ ΜΕΛΕΤΗ ΠΟΥ ΕΠΙΒΕΒΑΙΩΝΕΤΑΙ ΠΕΙΡΑΜΑΤΙΚΑ ΤΩΝ ΧΑΡΑΚΤΗΡΙΣΤΙΚΩΝ ΤΩΝ ΑΝΑΛΥΤΩΝ ΟΠΩΣ ΛΟΓΟΣ ΣΗΜΑΤΟΣ ΠΡΟΣ ΘΟΡΥΒΟ ΔΙΑΚΡΙΤΙΚΗ ΙΚΑΝΟΤΗΤΑ ΚΑΙ ΕΥΑΙΣΘΗΣΙΑ."],"dc:identifier":["10.12681/eadd/0460","http://hdl.handle.net/10442/hedi/0460"],"dc:language":["gre"],"dc:publisher":["Πανεπιστήμιο Πατρών","University of Patras"],"dc:subject":["Digital modulation","Signal processing","Spectrum analysis","Επεξεργασία σήματος","Φασματική ανάλυση","Ψηφιακή διαμόρφωση","Φυσικές Επιστήμες","Natural Sciences","Φυσική","Physical Sciences"],"dc:title":["Η ΧΡΗΣΗ ΤΗΣ ΔΙΑΜΟΡΦΩΣΗΣ Δ-Σ ΣΤΗ ΦΑΣΜΑΤΙΚΗ ΑΝΑΛΥΣΗ ΣΗΜΑΤΩΝ","THE USE OF Δ-Σ MODULATION IN SPECTRAL ANALYSIS"],"dc:type":["PhD Thesis"]},"updated_at":"2026-07-24T02:25:17Z"}