| Autor: |
Rezvanitabar A, Kilinc MS, Tekes C, Arkan EF, Ghovanloo M, Degertekin FL |
| Jazyk: |
angličtina |
| Zdroj: |
IEEE transactions on biomedical circuits and systems [IEEE Trans Biomed Circuits Syst] 2022 Aug; Vol. 16 (4), pp. 492-501. Date of Electronic Publication: 2022 Oct 12. |
| DOI: |
10.1109/TBCAS.2022.3181157 |
| Abstrakt: |
This paper presents an active impedance matching scheme that tries to optimize electrical power transfer and acoustic reflectivity in ultrasound transducers. Leveraging negative capacitance-based impedance matching would potentially improve the bandwidth and electrical power transfer while minimizing acoustic reflection of transducer elements and improve uniformity while reducing acoustic crosstalk of transducer arrays. A 16-element transceiver front-end is designed which employs an element-level active capacitive impedance cancellation scheme using an element-level negative impedance converter. The ASIC fabricated in 180-nm HVBCD technology provides high-voltage pulses up to 60 V consuming 3.6 mW and occupying 2.5 mm 2 . The front-end ASIC is used with a 1-D capacitive micromachined ultrasonic transducer (CMUT) array and its acoustical reflectivity reduction and imaging capabilities have successfully been demonstrated through pulse-echo measurements and acoustic imaging experiments. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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