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. 2018 Dec 3;18(12):4248. doi: 10.3390/s18124248

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© 2018 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/).

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(a) Pulse-echo response setup; (b) Echo amplitude when using the ultrasonic power amplifier integrated with series-diode linearizer; (c) Echo amplitude comparison data when using the ultrasonic power amplifier with and without series-diode linearizer at 5 V DC bias voltage; (d) Spectrum data when using the ultrasonic power amplifier integrated with series-diode linearizer at 5 V DC bias voltage; (e) HD and THD comparison data of the echo signals of the ultrasonic transducers when using ultrasonic power amplifiers integrated with series-diode linearizer and the isolated ultrasonic power amplifier only.