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Wide Bandwidth Class-S Power Amplifiers for Ultrasonic Devices
Wide bandwidth ultrasonic devices are a necessity in high-resolution ultrasonic systems. Therefore, constant output voltages need to be produced across the wide bandwidths of a power amplifier. We present the first design of a wide bandwidth class-S power amplifier for ultrasonic devices. The −6 dB...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6982734/ https://www.ncbi.nlm.nih.gov/pubmed/31947972 http://dx.doi.org/10.3390/s20010290 |
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author | You, Kiheum Choi, Hojong |
author_facet | You, Kiheum Choi, Hojong |
author_sort | You, Kiheum |
collection | PubMed |
description | Wide bandwidth ultrasonic devices are a necessity in high-resolution ultrasonic systems. Therefore, constant output voltages need to be produced across the wide bandwidths of a power amplifier. We present the first design of a wide bandwidth class-S power amplifier for ultrasonic devices. The −6 dB bandwidth of the developed class-S power amplifier was measured at 125.07% at 20 MHz, thus, offering a wide bandwidth for ultrasonic devices. Pulse-echo measurement is a performance measurement method used to evaluate the performance of ultrasonic transducers, components, or systems. The pulse-echo signals were obtained using an ultrasonic transducer with designed power amplifiers. In the pulse-echo measurements, time and frequency analyses were conducted to evaluate the bandwidth flatness of the power amplifiers. The frequency range of the ultrasonic transducer was measured and compared when using the developed class-S and commercial class-A power amplifiers with the same output voltages. The class-S power amplifiers had a relatively flat bandwidth (109.7 mV at 17 MHz, 112.0 mV at 20 MHz, and 109.5 mV at 23 MHz). When the commercial class-A power amplifier was evaluated under the same conditions, an uneven bandwidth was recorded (110.6 mV at 17 MHz, 111.5 mV at 20 MHz, and 85.0 mV at 23 MHz). Thus, we demonstrated that the designed class-S power amplifiers could prove useful for ultrasonic devices with a wide frequency range. |
format | Online Article Text |
id | pubmed-6982734 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-69827342020-02-28 Wide Bandwidth Class-S Power Amplifiers for Ultrasonic Devices You, Kiheum Choi, Hojong Sensors (Basel) Article Wide bandwidth ultrasonic devices are a necessity in high-resolution ultrasonic systems. Therefore, constant output voltages need to be produced across the wide bandwidths of a power amplifier. We present the first design of a wide bandwidth class-S power amplifier for ultrasonic devices. The −6 dB bandwidth of the developed class-S power amplifier was measured at 125.07% at 20 MHz, thus, offering a wide bandwidth for ultrasonic devices. Pulse-echo measurement is a performance measurement method used to evaluate the performance of ultrasonic transducers, components, or systems. The pulse-echo signals were obtained using an ultrasonic transducer with designed power amplifiers. In the pulse-echo measurements, time and frequency analyses were conducted to evaluate the bandwidth flatness of the power amplifiers. The frequency range of the ultrasonic transducer was measured and compared when using the developed class-S and commercial class-A power amplifiers with the same output voltages. The class-S power amplifiers had a relatively flat bandwidth (109.7 mV at 17 MHz, 112.0 mV at 20 MHz, and 109.5 mV at 23 MHz). When the commercial class-A power amplifier was evaluated under the same conditions, an uneven bandwidth was recorded (110.6 mV at 17 MHz, 111.5 mV at 20 MHz, and 85.0 mV at 23 MHz). Thus, we demonstrated that the designed class-S power amplifiers could prove useful for ultrasonic devices with a wide frequency range. MDPI 2020-01-04 /pmc/articles/PMC6982734/ /pubmed/31947972 http://dx.doi.org/10.3390/s20010290 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article You, Kiheum Choi, Hojong Wide Bandwidth Class-S Power Amplifiers for Ultrasonic Devices |
title | Wide Bandwidth Class-S Power Amplifiers for Ultrasonic Devices |
title_full | Wide Bandwidth Class-S Power Amplifiers for Ultrasonic Devices |
title_fullStr | Wide Bandwidth Class-S Power Amplifiers for Ultrasonic Devices |
title_full_unstemmed | Wide Bandwidth Class-S Power Amplifiers for Ultrasonic Devices |
title_short | Wide Bandwidth Class-S Power Amplifiers for Ultrasonic Devices |
title_sort | wide bandwidth class-s power amplifiers for ultrasonic devices |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6982734/ https://www.ncbi.nlm.nih.gov/pubmed/31947972 http://dx.doi.org/10.3390/s20010290 |
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