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

Volume

2

fYear

2004

fDate

23-27 Aug. 2004

Firstpage

1413

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2004 IEEE

ISSN

1051-0117

Print_ISBN

0-7803-8412-1

Type

conf

DOI

10.1109/ULTSYM.2004.1418064

Filename

1418064