Title :
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
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;
Conference_Titel :
Electrical and Computer Engineering (CCECE), 2013 26th Annual IEEE Canadian Conference on
Conference_Location :
Regina, SK
Print_ISBN :
978-1-4799-0031-2
Electronic_ISBN :
0840-7789
DOI :
10.1109/CCECE.2013.6567791
