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      • Department of Electrical and Electronics Engineering
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      Calculation of transformer ratio in mason's equivalent circuit for cMUTs

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      Author(s)
      Ölçüm, Selim
      Atalar, Abdullah
      Köymen, Hayrettin
      Şenlik, Muhammed Niyazi
      Date
      2006
      Source Title
      Proceedings of the Ultrasonics Symposium, IEEE 2006
      Print ISSN
      1051-0117
      Publisher
      IEEE
      Pages
      1947 - 1950
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
      169
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      115
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      Abstract
      We present a new method to calculate the transformer ratio of a cMUT in Mason's Equivalent circuit model. The effect of the spring softening capacitance is also included in the analysis. We use the existing turns ratio calculation methods as a starting point to calculate the force-voltage ratio at the secondary of the transformer and the input port of the circuit. We use this ratio and the capacitances in the Mason's circuit to find the actual turns ratio. Different methods are discussed for the calculation of the equivalent circuit parameters. We show that the transformer ratio has a bounded maximum at collapse voltage. We also investigate the effect of electrode size on the transformer ratio. Transformer ratio decreases with decreasing electrode size.
      Keywords
      Calculation methods
      Collapse voltage
      Electrode size
      Equivalent circuit model
      Equivalent circuit parameter
      Input port
      Voltage ratios
      Capacitance
      Equivalent circuits
      Permalink
      http://hdl.handle.net/11693/27170
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/ULTSYM.2006.492
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      • Department of Electrical and Electronics Engineering 3702
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