Title :
Development of a linear power amplifier for high frame rate imaging system [biomedical ultrasound imaging applications]
Author :
Lu, Jian-Yu ; Waugaman, John L.
Author_Institution :
Dept. of Bioeng., Toledo Univ., OH, USA
Abstract :
A linear power amplifier was developed for a high frame rate imaging system. Due to the relatively large number of channels (128) and the high peak power capability of the imaging system (about 300 W/channel), the power amplifier was designed to minimize the static power consumption without significant signal distortions. To realize such an amplifier, active bias voltage control of the output MOSFETs and output offset adjustment were implemented. A printed circuit board (PCB) was designed and assembled with surface-mount components. The complete amplifier was tested and used with the high frame rate imaging system to obtain RF echo signals for image construction.
Keywords :
MOSFET circuits; biomedical ultrasonics; linearisation techniques; power amplifiers; surface mount technology; 300 W; 50 kHz to 10 MHz; RF echo signals; biomedical ultrasound imaging; high frame rate imaging system; image construction; linear power amplifier; output MOSFET active bias voltage control; output offset adjustment; peak power capability; static power consumption minimization; surface-mount components; Biomedical imaging; Distortion; Energy consumption; High power amplifiers; MOSFETs; Printed circuits; Radiofrequency amplifiers; Signal design; Ultrasonic imaging; Voltage control;
Conference_Titel :
Ultrasonics Symposium, 2004 IEEE
Print_ISBN :
0-7803-8412-1
DOI :
10.1109/ULTSYM.2004.1418064
