An Ultrasound Receiver With Bandwidth-Enhanced Current Conveyor and Element-Level Ultrasound Transmitter for Ultrasound Imaging Systems

Gichan Yun, Kyeongwon Jeong, Haidam Choi, Seunghyun Nam, Chaerin Oh, Hyunjoo Jenny Lee, Sohmyung Ha, Minkyu Je

Research output: Contribution to journalArticlepeer-review

Abstract

In this letter, we present an ultrasound (US) imaging system with a low-noise US receiver (RX) and an element-level US transmitter (TX) for a capacitive micromachined ultrasonic transducer (CMUT). The proposed US RX isolates the input parasitic capacitance (C P) from the front-end transimpedance stage by using a bandwidth-enhanced current conveyor. By reducing the effects of the C P , the noise and power efficiency are improved compared to the conventional current readout circuits. Also, a US TX having a class-D output stage is implemented to excite the CMUT with 30-V unipolar pulses. Fabricated in a 180-nm BCD process, the proposed US RX achieves input-referred noise of 2.0 pA/ Hz at 7.5 MHz and a bandwidth of 18 MHz with 25-pF CMUT capacitance while consuming 3.62 mW.

Original languageEnglish (US)
Pages (from-to)98-101
Number of pages4
JournalIEEE Solid-State Circuits Letters
Volume7
DOIs
StatePublished - 2024

Keywords

  • Capacitive micromachined ultrasonic transducer (CMUT)
  • current conveyor
  • parasitic capacitance
  • transimpedance
  • ultrasound (US)
  • US receiver (RX)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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