ArticlePloS one2021
High-efficiency high-voltage class F amplifier for high-frequency wireless ultrasound systems.
Article in PloS one, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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Who cites it
24 citing papers in PubMed.
- Design of Preamplifier for Ultrasound Transducers.Sensors (Basel, Switzerland) · 2024Review
- Novel stability approach using Routh-Hurwitz criterion for brain computer interface applications.Technology and health care : official journal of the European Society for Engineering and Medicine · 2024Article
- Power Amplifier Design for Ultrasound Applications.Micromachines · 2023Review
- Point-of-Care Thoracic Ultrasound in Children: New Advances in Pediatric Emergency Setting.Diagnostics (Basel, Switzerland) · 2023Review
- Harmonic-Reduced Bias Circuit for Ultrasound Transducers.Sensors (Basel, Switzerland) · 2023Article
- An Inverse Class-E Power Amplifier for Ultrasound Transducer.Sensors (Basel, Switzerland) · 2023Article
- ScAlN Film-Based Piezoelectric Micromechanical Ultrasonic Transducers with Dual-Ring Structure for Distance Sensing.Micromachines · 2023Article
- A Doherty Power Amplifier for Ultrasound Instrumentation.Sensors (Basel, Switzerland) · 2023Article
- Multi-Band Power Amplifier Module with Back-Off Efficiency Improvement using Ultra-Compact 3D Vertical Stack Multi-Chip Package for Cellular Handsets.Micromachines · 2022Article
- An ultrasound-induced wireless power supply based on AlN piezoelectric micromachined ultrasonic transducers.Scientific reports · 2022Article
- Multi Spherical Wave Imaging Method Based on Ultrasonic Array.Sensors (Basel, Switzerland) · 2022Article
- Improving PMUT Receive Sensitivity via DC Bias and Piezoelectric Composition.Sensors (Basel, Switzerland) · 2022Article
- A Wideband High-Efficiency GaN MMIC Power Amplifier for Sub-6-GHz Applications.Micromachines · 2022Article
- 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
- Generalized sidelobe canceler beamforming combined with Eigenspace-Wiener postfilter for medical ultrasound imaging.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
- Air-Writing Character Recognition with Ultrasonic Transceivers.Sensors (Basel, Switzerland) · 2021Article
- Breast Acoustic Parameter Reconstruction Method Based on Capacitive Micromachined Ultrasonic Transducer Array.Micromachines · 2021Article
- Ultrasound Imaging versus Radiographs in Differentiating Periapical Lesions: A Systematic Review.Diagnostics (Basel, Switzerland) · 2021Review
- A Virtual Instrument for Measuring the Piezoelectric Coefficients of a Thin Disc in Radial Resonant Mode.Sensors (Basel, Switzerland) · 2021Article
Corrections and comments
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Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
This paper presents a novel amplifier that satisfies both low distortion and high efficiency for high-frequency wireless ultrasound systems with limited battery life and size. While increasing the amplifier efficiency helps to address the problems for wireless ultrasound systems, it can cause signal distortion owing to harmonic components. Therefore, a new type of class F amplifier is designed to achieve high efficiency and low distortion. In the amplifier, the resonant circuit at each stage controls the harmonic components to reduce distortion and improve efficiency. Transformers with a large shunt resistor are also helpful to reduce the remaining noise in the input signal. The proposed class F amplifier is tested using simulations, and the voltage and current waveforms are analyzed to achieve correct operation with adequate efficiency and distortion. The measured performance of the class F amplifier has a gain of 23.2 dB and a power added efficiency (PAE) of 88.9% at 25 MHz. The measured DC current is 121 mA with a variance of less than 1% when the PA is operating. We measured the received echo signal through the pulse-echo response using a 25-MHz transducer owing to the compatibility of the designed class F amplifier with high- frequency transducers. The measured total harmonic distortion (THD) of the echo signal was obtained as 4.5% with a slightly low ring-down. The results show that the low THD and high PAE of the new high-efficiency and high-voltage amplifier may increase battery life and reduce the cooling fan size, thus providing a suitable environment for high-frequency wireless ultrasound systems.
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