A Wideband Noise and Harmonic Distortion Canceling Low-Noise Amplifier for High-Frequency Ultrasound Transducers. Academic Article uri icon


  • 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 (S11) 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.

published proceedings

  • Sensors (Basel)

altmetric score

  • 0.25

author list (cited authors)

  • Tang, Y., Feng, Y., Hu, H. e., Fang, C., Deng, H., Zhang, R., Zou, J., & Chen, J.

citation count

  • 0

complete list of authors

  • Tang, Yuxuan||Feng, Yulang||Hu, He||Fang, Cheng||Deng, Hao||Zhang, Runxi||Zou, Jun||Chen, Jinghong

publication date

  • December 2021