Print Email Facebook Twitter A Variable-Gain Low-Noise Transimpedance Amplifier for Miniature Ultrasound Probes Title A Variable-Gain Low-Noise Transimpedance Amplifier for Miniature Ultrasound Probes Author Kang, E. (TU Delft Electronic Instrumentation) Tan, M. (TU Delft Electronic Instrumentation) An, J. (TU Delft Electronic Instrumentation) Chang, Z.Y. (TU Delft Electronic Instrumentation) Vince, Philippe (Advanced Research group) Sénégond, Nicolas (Advanced Research group) Mateo, Tony (Advanced Research group) Meynier, Cyril (Advanced Research group) Pertijs, M.A.P. (TU Delft Electronic Instrumentation) Date 2020 Abstract This article presents a low-noise transimpedance amplifier (TIA) designed for miniature ultrasound probes. It provides continuously variable gain to compensate for the time-dependent attenuation of the received echo signal. This time-gain compensation (TGC) compresses the echo-signal dynamic range (DR) while avoiding imaging artifacts associated with discrete gain steps. Embedding the TGC function in the TIA reduces the output DR, saving power compared to prior solutions that apply TGC after the low-noise amplifier. The TIA employs a capacitive ladder feedback network and a current-steering circuit to obtain a linear-in-dB gain range of 37 dB. A variable-gain loop amplifier based on current-reuse stages maintains constant bandwidth in a power-efficient manner. The TIA has been integrated in a 64-channel ultrasound transceiver application-specific integrated circuit (ASIC) in a 180-nm BCDMOS process and occupies a die area of 0.12 mm2. It achieves a gain error below ±1 dB and a 1.7 pA/ √ Hz noise floor and consumes 5.2 mW from a ±0.9 V supply. B-mode images of a tissue-mimicking phantom are presented that show the benefits of the TGC scheme. Subject Continuous gain controltime-gain-compensation (TGC)transimpedance amplifier (TIA)ultrasound application-specific integrated circuit (ASIC)ultrasound imaging To reference this document use: http://resolver.tudelft.nl/uuid:e9d82c26-97cb-4dd1-8076-2f9d6545ed6d DOI https://doi.org/10.1109/JSSC.2020.3023618 ISSN 0018-9200 Source IEEE Journal of Solid State Circuits, 55 (12), 3157-3168 Bibliographical note Accepted author manuscript Part of collection Institutional Repository Document type journal article Rights © 2020 E. Kang, M. Tan, J. An, Z.Y. Chang, Philippe Vince, Nicolas Sénégond, Tony Mateo, Cyril Meynier, M.A.P. Pertijs Files PDF 09204362.pdf 4.93 MB Close viewer /islandora/object/uuid:e9d82c26-97cb-4dd1-8076-2f9d6545ed6d/datastream/OBJ/view