TY - GEN
T1 - A 20-MHz 2.3-mW Receiver and a 25-V Transmitter for Ultrasound Capsule Endoscopy
AU - Jeong, Kyeongwon
AU - Choi, Jaesuk
AU - Yun, Gichan
AU - Choi, Injun
AU - Son, Jeehoon
AU - Hwang, Jae Youn
AU - Ha, Sohmyung
AU - Je, Minkyu
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Biomedical applications of ultrasound (US) imaging have been extended and diversified. Some recent applications, such as intracardiac echocardiography [1], [2] and the intravascular US [3], require extreme miniaturization of the US imaging system. As another promising application, an ultrasound capsule endoscopy (USCE) is being developed to provide transmural scans of the gastrointestinal tract and enable the detection of deeper pathology [4]. However, the USCE has only been studied by focusing on the transducer array, and ASIC research for US imaging in capsule endoscopy has not been conducted. Moreover, the USCE imposes stringent restrictions on not only the system size but also the power consumption because the imaging system should operate for long hours with tiny batteries (Fig. 1). In our work, an on-chip US transmitter (TX) and a highly power-efficient US receiver (RX) IC for USCE application are proposed. Instead of using a power-hungry high-speed ADC to acquire the US signal at a high center frequency (f-textcenter), we propose a new RX structure employing synchronized analog envelop detection (ED) to reduce the required ADC speed. A noise-shaping SAR (NS-SAR) ADC is used to improve power efficiency further while providing high resolution.
AB - Biomedical applications of ultrasound (US) imaging have been extended and diversified. Some recent applications, such as intracardiac echocardiography [1], [2] and the intravascular US [3], require extreme miniaturization of the US imaging system. As another promising application, an ultrasound capsule endoscopy (USCE) is being developed to provide transmural scans of the gastrointestinal tract and enable the detection of deeper pathology [4]. However, the USCE has only been studied by focusing on the transducer array, and ASIC research for US imaging in capsule endoscopy has not been conducted. Moreover, the USCE imposes stringent restrictions on not only the system size but also the power consumption because the imaging system should operate for long hours with tiny batteries (Fig. 1). In our work, an on-chip US transmitter (TX) and a highly power-efficient US receiver (RX) IC for USCE application are proposed. Instead of using a power-hungry high-speed ADC to acquire the US signal at a high center frequency (f-textcenter), we propose a new RX structure employing synchronized analog envelop detection (ED) to reduce the required ADC speed. A noise-shaping SAR (NS-SAR) ADC is used to improve power efficiency further while providing high resolution.
UR - http://www.scopus.com/inward/record.url?scp=85146611576&partnerID=8YFLogxK
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U2 - 10.1109/A-SSCC56115.2022.9980696
DO - 10.1109/A-SSCC56115.2022.9980696
M3 - Conference contribution
AN - SCOPUS:85146611576
T3 - 2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings
BT - 2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022
Y2 - 6 November 2022 through 9 November 2022
ER -