High-efficiency high-voltage class F amplifier for high-frequency wireless ultrasound systems.

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 ac

SUBMITTER: Kim K 

PROVIDER: S-EPMC8006987 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature