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

doi:10.1109/LSSC.2024.3369605

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 journal › Article › peer-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 language	English (US)
Pages (from-to)	98-101
Number of pages	4
Journal	IEEE Solid-State Circuits Letters
Volume	7
DOIs	https://doi.org/10.1109/LSSC.2024.3369605
State	Published - 2024

Keywords

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

ASJC Scopus subject areas

Electrical and Electronic Engineering

Access to Document

10.1109/LSSC.2024.3369605

Cite this

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

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.",

keywords = "Capacitive micromachined ultrasonic transducer (CMUT), US receiver (RX), current conveyor, parasitic capacitance, transimpedance, ultrasound (US)",

author = "Gichan Yun and Kyeongwon Jeong and Haidam Choi and Seunghyun Nam and Chaerin Oh and Lee, {Hyunjoo Jenny} and Sohmyung Ha and Minkyu Je",

note = "Publisher Copyright: {\textcopyright} 2018 IEEE.",

year = "2024",

doi = "10.1109/LSSC.2024.3369605",

language = "English (US)",

volume = "7",

pages = "98--101",

journal = "IEEE Solid-State Circuits Letters",

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T1 - An Ultrasound Receiver With Bandwidth-Enhanced Current Conveyor and Element-Level Ultrasound Transmitter for Ultrasound Imaging Systems

AU - Yun, Gichan

AU - Jeong, Kyeongwon

AU - Choi, Haidam

AU - Nam, Seunghyun

AU - Oh, Chaerin

AU - Lee, Hyunjoo Jenny

AU - Ha, Sohmyung

AU - Je, Minkyu

PY - 2024

Y1 - 2024

N2 - 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.

AB - 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.

KW - Capacitive micromachined ultrasonic transducer (CMUT)

KW - US receiver (RX)

KW - current conveyor

KW - parasitic capacitance

KW - transimpedance

KW - ultrasound (US)

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JO - IEEE Solid-State Circuits Letters

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

Abstract

Keywords

ASJC Scopus subject areas

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