T/R-Switch Composed of 3 High-Voltage MOSFETs with 12.1 µW Consumption that can Perform Per-channel TX to RX Self-Loopback AC Tests for 3D Ultrasound Imaging with 3072-channel Transceiver

Kajiyama, Shinya; Igarashi, Yutaka; Yazaki, Toru; Katsube, Yusaku; Nishimoto, Tetsuya; Nakagawa, Tatsuo; Nakamura, Yūichi; Hayashi, Yoshihiro; Yamawaki, Taizo

doi:10.1109/a-sscc47793.2019.9056949

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…The fabricated chip is packaged in QFP44. The input signal is supplied to the LNA from arbitrary/function generator (Agilent: 33500B) through the on-chip TR-SW [4]. The output signal of the LNA is buffered by an on-chip monitoring buffer (MON-BUFFER) and measured by a differential probe (Agilent: 1141A) and spectrum analyzer (Keysight: N9030B).…”

Section: Measurement Resultsmentioning

confidence: 99%

“…2 shows an architecture of an ultrasound beamformer IC. The frontend transducer is connected to a low-noise amplifier (LNA) through a transmitter (TX) and receiver (RX) switch (TR-SW) [4]. A received ultrasound signal is converted into an electrical signal, amplified in the LNA stage, and sent to a variable delay stage and a subsequent adder stage.…”

Section: Introductionmentioning

confidence: 99%

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A Low-Power Current-Reuse LNA for 3D Ultrasound Beamformers

Nakamura

Kajiyama

Igarashi

et al. 2021

IEICE Trans. Fundamentals

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3D ultrasound imagers require low-noise amplifier (LNA) with much lower power consumption and smaller chip area than conventional 2D imagers because of the huge amount of transducer channels. This paper presents a low-power small-size LNA with a novel currentreuse circuitry for 3D ultrasound imaging systems. The proposed LNA is composed of a differential common source amplifier and a source-follower driver which share the current without using inductors. The LNA was fabricated in a 0.18-µm CMOS process with only 0.0056 mm 2 . The measured results show a gain of 21 dB and a bandwidth of 9 MHz. The proposed LNA achieves an average noise density of 11.3 nV/ √ Hz, and the 2nd harmonic distortion below −40 dBc with 0.1-Vpp input. The supply current is 85 µA with a 1.8-V power supply, which is competitive with conventional LNAs by finer CMOS process.

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Section: Measurement Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Low-Power Current-Reuse LNA for 3D Ultrasound Beamformers

Nakamura

Kajiyama

Igarashi

et al. 2021

IEICE Trans. Fundamentals

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“…These T/R switches (Fig. 20) can be classified into four categories, Zener diode bias approach [120], [121], floating latch approach [122], [123], level shifter approach [124]- [127] and dynamic gate-source shunt approach [128].…”

Section: Transmit/receive Switchmentioning

confidence: 99%

Integrated Circuits for Medical Ultrasound Applications: Imaging and Beyond

Zhang

Demosthenous²

2021

IEEE Trans. Biomed. Circuits Syst.

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Medical ultrasound has become a crucial part of modern society and continues to play a vital role in the diagnosis and treatment of illnesses. Over the past decades, the development of medical ultrasound has seen extraordinary progress as a result of the tremendous research advances in microelectronics, transducer technology and signal processing algorithms. However, medical ultrasound still faces many challenges including powerefficient driving of transducers, low-noise recording of ultrasound echoes, effective beamforming in a non-linear, high-attenuation medium (human tissues) and reduced overall form factor. This paper provides a comprehensive review of the design of integrated circuits for medical ultrasound applications. The most important and ubiquitous modules in a medical ultrasound system are addressed, i) transducer driving circuit, ii) low-noise amplifier, iii) beamforming circuit and iv) analog-digital converter. Within each ultrasound module, some representative research highlights are described followed by a comparison of the state-of-the-art. This paper concludes with a discussion and recommendations for future research directions.

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