ArticleSensors (Basel, Switzerland)2019
Stacked Transistor Bias Circuit of Class-B Amplifier for Portable Ultrasound Systems.
Article in Sensors (Basel, Switzerland), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed.
- Harmonic-Reduced Bias Circuit for Ultrasound Transducers.Sensors (Basel, Switzerland) · 2023Article
- An Inverse Class-E Power Amplifier for Ultrasound Transducer.Sensors (Basel, Switzerland) · 2023Article
- A Doherty Power Amplifier for Ultrasound Instrumentation.Sensors (Basel, Switzerland) · 2023Article
- Novel dual-resistor-diode limiter circuit structures for high-voltage reliable ultrasound receiver systems.Technology and health care : official journal of the European Society for Engineering and Medicine · 2022Article
- Fisheye lens design for solar-powered mobile ultrasound devices.Technology and health care : official journal of the European Society for Engineering and Medicine · 2022Article
- A New Approach to Power Efficiency Improvement of Ultrasonic Transmitters via a Dynamic Bias Technique.Sensors (Basel, Switzerland) · 2021Article
- Novel Bandwidth Expander Supported Power Amplifier for Wideband Ultrasound Transducer Devices.Sensors (Basel, Switzerland) · 2021Article
- Development of a low-cost six-axis alignment instrument for flexible 2D and 3D ultrasonic probes.Technology and health care : official journal of the European Society for Engineering and Medicine · 2021Article
- Inter-Stage Output Voltage Amplitude Improvement Circuit Integrated with Class-B Transmit Voltage Amplifier for Mobile Ultrasound Machines.Sensors (Basel, Switzerland) · 2020Article
- Post-Voltage-Boost Circuit-Supported Single-Ended Class-B Amplifier for Piezoelectric Transducer Applications.Sensors (Basel, Switzerland) · 2020Article
- Wireless Ultrasound Surgical System with Enhanced Power and Amplitude Performances.Sensors (Basel, Switzerland) · 2020Article
- Wide Bandwidth Class-S Power Amplifiers for Ultrasonic Devices.Sensors (Basel, Switzerland) · 2020Article
- A Macro Lens-Based Optical System Design for Phototherapeutic Instrumentation.Sensors (Basel, Switzerland) · 2019Article
Corrections and comments
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Authors and funding
1 author.
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Abstract
The performance of portable ultrasound systems is affected by the excessive heat generated by amplifiers, thereby reducing the sensitivity and resolution of the transducer devices used in ultrasound systems. Therefore, the amplifier needs to generate low amounts of heat to stabilize portable ultrasound systems. To properly control the amplifier, the related bias circuit must provide proper DC bias voltages for long time periods in ultrasound systems. To this end, a stacked transistor bias circuit was proposed to achieve a relatively constant amplifier performance irrespective of temperature variance without any cooling systems as the portable ultrasound system structure is limited. To prove the proposed concept, the performance of the gain and DC current consumption at different experimental times was measured and compared to a developed class-B amplifier with different bias circuits. The amplifier with the stacked transistor bias circuit outperformed with regard to the gain and DC current variance versus time (-0.72 dB and 0.065 A, respectively) compared to the amplifier with a typical resistor divider bias circuit (-5.27 dB and 0.237 A, respectively) after a certain time (5 min). Consequently, the proposed stacked transistor bias circuit is a useful electronic device for portable ultrasound systems with limited structure sizes because of its relatively low gain and DC current variance with respect to time.
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