Wideband LNA with 1.9 dB Noise Figure in 0.18 µm CMOS for High Frequency Ultrasound Imaging Applications
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© 2016 IEEE. This paper presents a receiver front-end circuit for wideband high-frequency ultrasound transducer applications. The front end consists of three main blocks, a low noise amplifier (LNA), a variable gain amplifier (VGA) and a biquad low pass filter (LPF). The receiver is specifically designed for polyvinylidene fluoride (PVDF) transducer imaging with a typical signal bandwidth of 10-60 MHz. To achieve both low noise figure (NF) and good impedance matching (S11) performance, a noise and nonlinearity canceling technique is utilized in the LNA. The front end is designed in 0.18 μm CMOS technology. Simulation results show that the LNA achieves 1.9 dB NFmin, 24 dB voltage gain with 18 mW of power consumption. The receiver front end achieves 62 dB voltage gain, 60 MHz 3-dB bandwidth and 2.2-3 dB NF with a power consumption of 45 mW.
author list (cited authors)
Tang, Y., Feng, Y., Zuo, Z., Fan, Q., Fang, C., Zou, J., & Chen;, J.