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Analog Front End Low Noise Amplifier in 0.18-µm CMOS for Ultrasound Imaging Applications

Authors: Dongning ZHAO, Minkyu Je, Haridas Kuruveettil, Cheong Jia Hao


We present the design of Analog front end (AFE) low noise pre-amplifier implemented in a high voltage 0.18-µm CMOS technology for  a three dimensional ultrasound  bio microscope (3D UBM) application. The fabricated chip has 4X16 pre-amplifiers implemented to interface   a 2-D array of    high frequency capacitive micro-machined ultrasound transducers (CMUT). Core AFE cell consists of a high-voltage pulser in the transmit path, and a low-noise transimpedance amplifier in the receive path. Proposed system offers a high image resolution by the use of high frequency CMUTs with associated high performance imaging electronics integrated together.  Performance requirements and the design methods of the high bandwidth transimpedance amplifier are described in the paper. A single cell of transimpedance (TIA) amplifier and the bias circuit occupies a silicon area of 250X380 µm2 and the full chip occupies a total silicon area of 10x6.8 mm².

Keywords: Medical Imaging, Ultrasound, Beam Forming, Analog front end, biomicroscope, transimpedance gain

Digital Object Identifier (DOI):

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