A 0.1-8GHz wideband low-noise amplifier exploiting gain-enhanced noise-cancelling technique

作者：Zhang, Zhichao^*; Dinh, Anh^*; Chen, Li^*

来源：IEICE Electronics Express, 2016, 13(2): 20150917.

DOI：10.1587/elex.12.20150917

• low-noise amplifier (LNA)
• noise cancellation
• noise figure (NF)
• resistive feedback
• wideband
• impedance matching

This paper presents a low-noise amplifier (LNA) design for multifunction receiver front-end. Based on the conventional noise cancelling technique, a gain-enhanced noise cancelling structure is presented and the effect of gain-enhanced stage is discussed. The wideband input matching is realized by a current-reuse common-source stage with an active feedback structure to alleviate the tradeoffs between NF, gain, and bandwidth. A peaking gate inductor is inserted to improve gain flatness and bandwidth of the designed amplifier. The proposed LNA was implemented in the 0.130 mu m CMOS technology. It achieves a S11 of <-10 dB in a wide frequency range 0.1-8 GHz and a gain of >14 dB with a 14.5 dB peak. Over this range, a minimum NF of 2.6 dB is achieved and the total power consumption is only 17 mW from a power supply of 1.2V. The results indicate that the proposed structure effectively improves the gain of conventional noise cancelling technique while the noise elimination and wideband input matching are maintained.

• 出版日期2016-1-25
• 单位Saskatoon; 中国矿业大学（北京）; Saskatchewan