A 20-MHz 2.3-mW Receiver and a 25-V Transmitter for Ultrasound Capsule Endoscopy

Kyeongwon Jeong, Jaesuk Choi, Gichan Yun, Injun Choi, Jeehoon Son, Jae Youn Hwang, Sohmyung Ha, Minkyu Je

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish (US)
Title of host publication2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665471435
DOIs
StatePublished - 2022
Event2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Taipei, Taiwan, Province of China
Duration: Nov 6 2022Nov 9 2022

Publication series

Name2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings

Conference

Conference2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022
Country/TerritoryTaiwan, Province of China
CityTaipei
Period11/6/2211/9/22

ASJC Scopus subject areas

  • Hardware and Architecture
  • Signal Processing
  • Electrical and Electronic Engineering
  • Safety, Risk, Reliability and Quality
  • Instrumentation
  • Computer Networks and Communications

Fingerprint

Dive into the research topics of 'A 20-MHz 2.3-mW Receiver and a 25-V Transmitter for Ultrasound Capsule Endoscopy'. Together they form a unique fingerprint.

Cite this