Equivalent circuit-based analysis of CMUT cell dynamics in arrays
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
1016 - 1024
Item Usage Stats
Capacitive micromachined ultrasonic transducers (CMUTs) are usually composed of large arrays of closely packed cells. In this work, we use an equivalent circuit model to analyze CMUT arrays with multiple cells. We study the effects of mutual acoustic interactions through the immersion medium caused by the pressure field generated by each cell acting upon the others. To do this, all the cells in the array are coupled through a radiation impedance matrix at their acoustic terminals. An accurate approximation for the mutual radiation impedance is defined between two circular cells, which can be used in large arrays to reduce computational complexity. Hence, a performance analysis of CMUT arrays can be accurately done with a circuit simulator. By using the proposed model, one can very rapidly obtain the linear frequency and nonlinear transient responses of arrays with an arbitrary number of CMUT cells. We performed several finite element method (FEM) simulations for arrays with small numbers of cells and showed that the results are very similar to those obtained by the equivalent circuit model.
Capacitive micromachined ultrasonic transducer
Equivalent circuit model
Finite element method simulation
Nonlinear transient response
Finite element method
Published Version (Please cite this version)http://dx.doi.org/10.1109/TUFFC.2013.2660
Showing items related by title, author, creator and subject.
Transient analysis of nonlinear circuits by combining asymptotic waveform evaluation with volterra series Celik, M.; Atalar, Abdullah; Tan, M. A. (Institute of Electrical and Electronics Engineers, 1995-08)A new method is proposed for the transient analysis of circuits with large number of linear lumped elements and lossy coupled transmission lines, and with few mildly nonlinear terminations. The method combines the ...
Aydoğdu, Elif; Özgürlük, Alper; Oğuz, H. Kağan; Atalar, Abdullah; Kocabaş, Coşkun; Köymen, Hayrettin (IEEE, 2012)An equivalent electrical circuit model valid for collapsed mode operation of CMUT is described. The across and through variables of the circuit model are chosen to be rms force and rms displacement over the surface of the ...
A Wired-AND Current-Mode Logic Circuit Technique in CMOS for Low-Voltage, High-Speed and Mixed-Signal VLSIC Ungan I.E.; Aşkar, M. (1997)A wired-AND current-mode logic (WCML) circuit technique in CMOS technology for low-voltage and high-speed VLSI circuits is proposed, and a WCML cell library is developed using standard 0.8 micron CMOS process. The proposed ...