Low Noise Low Power Preamplifier for IntegratedUltrasound Needle Intervention Application

This paper presents the design andimplementation of a fully integrated trans-impedance amplifier(TIA) as the pre-amplifier of analog front-end for ultrasoundneedle intervention application. The application demands verylow power solution for the receiver operating in the frequencyband 1.3 MHz to 3.9 MHz. The design adapts low powerarchitecture to create low noise electronic interface forCapacitive Micro-machined Ultrasound Transducers (CMUT)sensor. Using a 0.18-μm CMOS/DMOS process, simulationresults of this interface IC show that the proposed TIA canprovide 104 dBΩ trans-impedance gain, 1.44 nArms inputreferred noise integrated over frequency band 1.3 MHz to 3.9MHz, while consuming 200 μA current from 1.8-V supply.