Bias-Voltage Stabilizer for HVHF Amplifiers in VHF Pulse-Echo Measurement Systems
DC Field | Value | Language |
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dc.contributor.author | Choi, Hojong | - |
dc.contributor.author | Park, Chulwoo | - |
dc.contributor.author | Kim, Jungsuk | - |
dc.contributor.author | Jung, Hayong | - |
dc.date.available | 2020-02-27T17:41:39Z | - |
dc.date.created | 2020-02-06 | - |
dc.date.issued | 2017-10 | - |
dc.identifier.issn | 1424-8220 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/5677 | - |
dc.description.abstract | The impact of high-voltage-high-frequency (HVHF) amplifiers on echo-signal quality is greater with very-high-frequency (VHF, 100 MHz) ultrasound transducers than with low-frequency (LF, 15 MHz) ultrasound transducers. Hence, the bias voltage of an HVHF amplifier must be stabilized to ensure stable echo-signal amplitudes. We propose a bias-voltage stabilizer circuit to maintain stable DC voltages over a wide input range, thus reducing the harmonic-distortion components of the echo signals in VHF pulse-echo measurement systems. To confirm the feasibility of the bias-voltage stabilizer, we measured and compared the deviations in the gain of the HVHF amplifier with and without a bias-voltage stabilizer. Between -13 and 26 dBm, the measured gain deviations of a HVHF amplifier with a bias-voltage stabilizer are less than that of an amplifier without a bias-voltage stabilizer. In order to confirm the feasibility of the bias-voltage stabilizer, we compared the pulse-echo responses of the amplifiers, which are typically used for the evaluation of transducers or electronic components used in pulse-echo measurement systems. From the responses, we observed that the amplitudes of the echo signals of a VHF transducer triggered by the HVHF amplifier with a bias-voltage stabilizer were higher than those of the transducer triggered by the HVHF amplifier alone. The second, third, and fourth harmonic-distortion components of the HVHF amplifier with the bias-voltage stabilizer were also lower than those of the HVHF amplifier alone. Hence, the proposed scheme is a promising method for stabilizing the bias voltage of an HVHF amplifier, and improving the echo-signal quality of VHF transducers. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | MDPI | - |
dc.relation.isPartOf | SENSORS | - |
dc.subject | ULTRASONIC TRANSDUCERS | - |
dc.subject | DRUG-DELIVERY | - |
dc.title | Bias-Voltage Stabilizer for HVHF Amplifiers in VHF Pulse-Echo Measurement Systems | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.identifier.wosid | 000414931500267 | - |
dc.identifier.doi | 10.3390/s17102425 | - |
dc.identifier.bibliographicCitation | SENSORS, v.17, no.10 | - |
dc.identifier.scopusid | 2-s2.0-85032570690 | - |
dc.citation.title | SENSORS | - |
dc.citation.volume | 17 | - |
dc.citation.number | 10 | - |
dc.contributor.affiliatedAuthor | Kim, Jungsuk | - |
dc.type.docType | Article | - |
dc.subject.keywordAuthor | bias-voltage stabilizer | - |
dc.subject.keywordAuthor | high-voltage-high-frequency amplifier | - |
dc.subject.keywordAuthor | VHF ultrasound transducers | - |
dc.subject.keywordAuthor | pulse-echo measurement systems | - |
dc.subject.keywordPlus | ULTRASONIC TRANSDUCERS | - |
dc.subject.keywordPlus | DRUG-DELIVERY | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Instruments & Instrumentation | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Analytical | - |
dc.relation.journalWebOfScienceCategory | Engineering, Electrical & Electronic | - |
dc.relation.journalWebOfScienceCategory | Instruments & Instrumentation | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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