An integrated ultrasound transducer driver for HIFU applications

Author

Wai Wong ; Christoffersen, Carlos ; Pichardo, S. ; Curiel, L.

Author_Institution

Dept. of Electr. & Comput. Eng., Lakehead Univ., Thunder Bay, ON, Canada

fYear

2013

fDate

5-8 May 2013

Firstpage

1

Lastpage

5

Abstract

This paper presents for the first time an MRI-compatible integrated CMOS amplifier capable of directly driving a piezoelectric ultrasound transducer for High Intensity Focused Ultrasound (HIFU) applications. The amplifier operates in class DE mode loaded with a piezoelectric ultrasound transducer connected in parallel with a shunt capacitor. There is no need for external inductors. The integrated amplifier is implemented with the Teledyne-DALSA 0.8 μm CMOS process. Modeling of the piezoelectric transducer and amplifier design considerations are presented, followed by simulation results obtained using the Spectre simulator. The proposed design achieves over 80% efficiency with 1 W of output power at 1 MHz and an acceptable third harmonic level. The estimated die area of the amplifier is 2 mm².

Keywords

CMOS integrated circuits; amplifiers; biomedical MRI; biomedical electronics; biomedical transducers; biomedical ultrasonics; capacitors; piezoelectric devices; DE amplifier; HIFU application; MRI-compatible integrated CMOS amplifier; Spectre simulator; Teledyne-DALSA CMOS process; frequency 1 MHz; high intensity focused ultrasound; piezoelectric ultrasound transducer; power 1 W; shunt capacitor; size 0.8 mum; third harmonic level; Capacitors; Crystals; Harmonic analysis; Impedance; Resonant frequency; Transducers; Ultrasonic imaging; HIFU; class DE amplifier; piezoelectric transducer driver; ultrasound transducer;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering (CCECE), 2013 26th Annual IEEE Canadian Conference on

Conference_Location

Regina, SK

ISSN

0840-7789

Print_ISBN

978-1-4799-0031-2

Electronic_ISBN

0840-7789

Type

conf

DOI

10.1109/CCECE.2013.6567791

Filename

6567791