Design of Integrated High Voltage Pulse Generator for Medical Ultrasound Transmitters

Deng-Fong LU  Chin HSIA  Jian-Chiun LIOU  Yen-Chung HUANG  

IEICE TRANSACTIONS on Communications   Vol.E102-B   No.6   pp.1121-1127
Publication Date: 2019/06/01
Publicized: 2018/12/28
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2018HMP0001
Type of Manuscript: Special Section PAPER (Special Section on Healthcare, Medical Information and Communication Technology for Safe and Secure Society)
high voltage pulse generator,  ultrasound scanner,  medical imaging,  harmonic distortion,  

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Design of an equivalent slew-rate monolithic pulse generator using bipolar-CMOS-DMOS (BCD) technology for medical ultrasound transmitters is presented in this paper. The pulse generator employs a floating capacitive coupling level-shifter architecture to produce a high-voltage (Vpp=80V) output. The performance of equivalent slew-rate in the rising and falling edge is achieved by carefully choosing the value of coupling capacitors and the size of the final stage high-voltage MOSFETs of the pulse generator. The measured output pulses show the rising and falling time of 8.6nsec and 8.5nsec, respectively with second harmonic distortion down to -40dBc, indicating the designed pulse generator can be used for advanced ultrasonic harmonic imaging systems.