A Low Voltage High Gain Transformer Noise-Canceling Current Mode Ultrawideband CMOS Low Noise Amplifier

作者：Sun, Jingru^*; Cao, Xiaodong; Wang, Chunhua; Liu, Jinjiang; Zhao, Manfeng

来源：Frequenz, 2012, 66(3-4): 85-90.

DOI：10.1515/freq-2012-0021

• UWB LNA
• current mode
• low voltage
• high gain
• transformer

This paper presents a novel current mode differential UWB LNA. A common-gate stage with transformer realizes a low noise input matching and produces a current gain. The output of the LNA is differential current, which can avoid the current-to-voltage conversion. The LNA is simulated with TSMC 0.18 mu m RF CMOS process. Simulation results show that the max noise figure is only 2.65 dB, transconductance gain is larger than 18.7 dB, input reflection coefficient is lower than -9.9 dB, and third order input intercept point is about 2.8 dBm over 3-5 GHz. With a voltage of 0.8 V, the power consumption is 11 mW. A comparison with conventional UWB LNA shows that this LNA has advantages of low voltage, low noise, high gain, and high linearity.

• 出版日期2012
• 单位湖南大学