Download 1V Transimpedance Amplifier for Medical Ultrasound Imaging

1V Transimpedance Amplifier for Medical
Ultrasound Imaging
Chen Zhao
In these days, traditional piezo electric transducers used in intra-vascular
ultrasound iamging are being replaced by Capacitive Micro Machined Ultrasound
Transducers (CMUTs) as CMUTs can easily be integrated with CMOS front end
electronic circuits.
My goal is to design a 1V transimpedance amplifier in CMOS technology as an
analog front-end for Capacitive Micro machined Ultrasound Transducers (CMUTs)
for medical ultrasound imaging. The proposed amplifier is designed to amplify the
signals from 15MHz to 45MHz with a center frequency of 30MHz. The proposed
amplifier will achieves a voltage gain of 15 dB, an output noise power spectral
density of 0.05 (uV)/SQRT(Hz) at a center-frequency of 30 MHz.
First, I will design a transimpedance amplifier in CMOS for CMUTs. Then the
small signal electrical equivalent circuit of a single CMUT element will be designed
and used with a center frequency of 30MHz. Next, simulation and measurement
results of the proposed amplifier will be used to compare with previously published
results for similar applicantions.
[1] Cenkeramaddi, L.R.; Ytterdal, T. , 1V transimpedance amplifier in 90nm
CMOS for medical ultrasound imaging, NORCHIP, 2009, pp.1–4.