An Ultra-Wideband Low-Noise Amplifier Combining Noise-Canceling and Self-Forward-BodyBias Techniques Achieving 2.9-to-3.7dB NF

In this paper, a single-ended to differential ultra-wideband (UWB) low-noise amplifier (LNA) is proposed, featuring the combination of noise-canceling (NC) and self-forward-body-bias (SFBB) techniques. By cross-connecting the NC networks, the noise due to the common-source and common-gate transistors at input can be effectively canceled. Besides, the SFBB technique is smartly introduced in the LNA to reduce the power supply and also for the power consumption. Furthermore, the current-reuse topology is employed for further reduce the power consumption. Implemented in 40nm CMOS process, our proposed LNA exhibits a gain (S 21 ) of 11.3 to 14.3dB with input-impedance matching (S 11 ) $\lt -10$dB for a frequency range of 3 to 5GHz. The noise figure (NF) is simulated $2.9 \sim 3.7$ dB, and the 3$^{rd}$order input-intercept point (IIP3) is -10.2 to -0.4dBm. Under 1V supply, the power consumption is 13mW. The active area is 0.25mm$^{2}$. The proposed LNA effectively achieves the purpose of low noise and low power consumption.