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 &#...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-01-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/20/1/290 |
| _version_ | 1811186279740604416 |
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| author | Kiheum You Hojong Choi |
| author_facet | Kiheum You Hojong Choi |
| author_sort | Kiheum You |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-04-11T13:42:48Z |
| format | Article |
| id | doaj.art-4f509b0c8f824b8e859edc047613fb66 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:42:48Z |
| publishDate | 2020-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-4f509b0c8f824b8e859edc047613fb662022-12-22T04:21:10ZengMDPI AGSensors1424-82202020-01-0120129010.3390/s20010290s20010290Wide Bandwidth Class-S Power Amplifiers for Ultrasonic DevicesKiheum You0Hojong Choi1Department of Medical IT Convergence Engineering, Kumoh National Institute of Technology, Gumi 39253, KoreaDepartment of Medical IT Convergence Engineering, Kumoh National Institute of Technology, Gumi 39253, KoreaWide 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.https://www.mdpi.com/1424-8220/20/1/290class-s power amplifierwide bandpower amplifierultrasound system |
| spellingShingle | Kiheum You Hojong Choi Wide Bandwidth Class-S Power Amplifiers for Ultrasonic Devices Sensors class-s power amplifier wide band power amplifier ultrasound system |
| 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 | class-s power amplifier wide band power amplifier ultrasound system |
| url | https://www.mdpi.com/1424-8220/20/1/290 |
| work_keys_str_mv | AT kiheumyou widebandwidthclassspoweramplifiersforultrasonicdevices AT hojongchoi widebandwidthclassspoweramplifiersforultrasonicdevices |