A Wideband Noise and Harmonic Distortion Canceling Low-Noise Amplifier for High-Frequency Ultrasound Transducers

This paper presents a wideband low-noise amplifier (LNA) front-end with noise and distortion cancellation for high-frequency ultrasound transducers. The LNA employs a resistive shunt-feedback structure with a feedforward noise-canceling technique to accomplish both wideband impedance matching and lo...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2021-12, Vol.21 (24), p.8476
Main Authors: Tang, Yuxuan, Feng, Yulang, Hu, He, Fang, Cheng, Deng, Hao, Zhang, Runxi, Zou, Jun, Chen, Jinghong
Format: Article
Language:English
Subjects:
Aluminum
Amplifier design
Amplifiers
Amplifiers, Electronic
Bandwidths
Broadband
CMOS
Design specifications
Efficiency
Electrodes
Feedback
Harmonic distortion
harmonic distortion cancellation
high-frequency ultrasound transducers
Impedance matching
Low noise
low-noise amplifier
noise cancellation
resistive shunt-feedback amplifier
Signal Processing, Computer-Assisted
Topology
Transducers
Transistors
Ultrasonic imaging
Ultrasonic transducers
Ultrasonography
Variable gain
Voltage gain
wideband impedance matching
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Summary:This paper presents a wideband low-noise amplifier (LNA) front-end with noise and distortion cancellation for high-frequency ultrasound transducers. The LNA employs a resistive shunt-feedback structure with a feedforward noise-canceling technique to accomplish both wideband impedance matching and low noise performance. A complementary CMOS topology was also developed to cancel out the second-order harmonic distortion and enhance the amplifier linearity. A high-frequency ultrasound (HFUS) and photoacoustic (PA) imaging front-end, including the proposed LNA and a variable gain amplifier (VGA), was designed and fabricated in a 180 nm CMOS process. At 80 MHz, the front-end achieves an input-referred noise density of 1.36 nV/sqrt (Hz), an input return loss (S ) of better than -16 dB, a voltage gain of 37 dB, and a total harmonic distortion (THD) of -55 dBc while dissipating a power of 37 mW, leading to a noise efficiency factor (NEF) of 2.66.
ISSN:1424-8220
1424-8220
DOI:10.3390/s21248476