Low Noise Low Power Preamplifier for Integrated Ultrasound Needle Intervention Application
Keywords:
Analog front-end,capacitive micro-machined ultrasoundtransducer, trans-impedance amplifierAbstract
This paper presents the design and
implementation of a fully integrated trans-impedance amplifier
(TIA) as the pre-amplifier of analog front-end for ultrasound
needle intervention application. The application demands very
low power solution for the receiver operating in the frequency
band 1.3 MHz to 3.9 MHz. The design adapts low power
architecture to create low noise electronic interface for
Capacitive Micro-machined Ultrasound Transducers (CMUT)
sensor. Using a 0.18-µm CMOS/DMOS process, simulation
results of this interface IC show that the proposed TIA can
provide 104 dBΩ trans-impedance gain, 1.44 nArms input
referred noise integrated over frequency band 1.3 MHz to 3.9
MHz, while consuming 200 μA current from 1.8-V supply
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