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Pregled bibliografske jedinice broj: 584421

Časopis

Autori: Matić, Tomislav; Švedek, Tomislav; Vinko, Davor
Naslov: Integrator Clamping for Asynchronous Sigma-Delta Modulator Central Frequency Increment
Izvornik: Iet circuits devices & systems (1751-858X) 6 (2012), 5; 338-346
Vrsta rada: članak
Ključne riječi: Asynchronous Sigma-Delta Modulator; central frequency; oscillator; hysteresis voltage; propagation delay; voltage clamping
Sažetak:
Hysteretic comparator (Schmitt trigger) is the basic part of the Asynchronous Sigma-Delta Modulator (ASDM). If propagation delay of a hysteretic comparator is not equal to zero and it has measurable value, than it affects the ASDM output frequency spectrum. Since ASDM is a circuit with serial connection of integrator and hysteretic comparator followed by negative feedback loop, propagation delay of the comparator will introduce the timing errors in ASDM output signal triggering events. Therefore ASDM central frequency will be lower then it is in the case for propagation delay equal to zero. The paper provides mathematical analysis of the hysteretic comparator propagation delay influence to the ASDM output frequency spectrum. The method for ASDM central frequency improvement using integrator voltage clamping has been proposed. Mathematical analysis, together with simulation and measurement results, shows partial central frequency increment. Since ASDM circuit can be used as an oscillator for zero input signals, central frequency improvement can be significant.
Projekt / tema: 165-0362027-1479, 165-0362980-2002, 165-0361630-3049, 165-0361630-1636
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Elektrotehnika,Računarstvo
URL Internet adrese: http://digital-library.theiet.org/qab_login.jsp?purchasable=true&d=1352283261179
http://dx.doi.org/10.1049/iet-cds.2011.0322
http://digital-library.theiet.org/qab_login.jsp?purchasable=true&d=1352283261179
Broj citata:
Altmetric:
DOI: 10.1049/iet-cds.2011.0322
URL cjelovitog teksta: http://digital-library.theiet.org/qab_login.jsp?purchasable=true&d=1352283261179
Google Scholar: Integrator Clamping for Asynchronous Sigma-Delta Modulator Central Frequency Increment
Upisao u CROSBI: tmatic@etfos.hr (tmatic@etfos.hr), 20. Lip. 2012. u 10:32 sati



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