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

被引：0
|
作者：
Yun, Gichan [1 ]
Jeong, Kyeongwon [1 ]
Choi, Haidam [1 ]
Nam, Seunghyun [1 ]
Oh, Chaerin [1 ]
Lee, Hyunjoo Jenny [1 ]
Ha, Sohmyung [2 ,3 ]
Je, Minkyu [1 ]
机构：
[1] Korea Adv Inst Sci & Technol KAIST, Sch Elect Engn, Daejeon 34141, South Korea
[2] New York Univ Abu Dhabi, Div Engn, Abu Dhabi, U Arab Emirates
[3] NYU, Tandon Sch Engn, New York, NY 10003 USA
来源：
IEEE SOLID-STATE CIRCUITS LETTERS | 2024年 / 7卷
关键词：
Imaging; Radio frequency; Gain; Transducers; Transistors; Capacitors; Receivers; Capacitive micromachined ultrasonic transducer (CMUT); current conveyor; parasitic capacitance; transimpedance; ultrasound (US); US receiver (RX); FRONT-END; CMUT; DIGITIZATION; AMPLIFIER;
D O I：
10.1109/LSSC.2024.3369605
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
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/root Hz at 7.5 MHz and a bandwidth of 18 MHz with 25-pF CMUT capacitance while consuming 3.62 mW.
引用
收藏
页码：98 / 101
页数：4
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