Ultrasonic transducers 3 Ultrasound transducers ultrasound transducer 2 Bias circuits 1 Bias voltage 1 Biomedical engineering 1 C (programming language) 1 Class A 1 Data acquisition 1 Data acquisition system 1 Electronics read outs 1 FPGA 1 FPGA technology 1 Field programmable gate arrays (FPGA) 1 Harmonic analysis 1 Harmonic signals 1 Harmonic-reduced bias circuit 1 High amplitudes 1 Input voltage signal 1 Machine learning models 1 Muscle 1 Muscle contractions 1 Muscle fatigues 1 One-dimensional 1 Output voltages 1 Percentage error 1 Power amplifiers 1 Radio waves 1 Radiofrequency signals 1 Reflected signal 1