FAN Runwu,GUO Bengqing.A Broadband Active-Feedforward Noise-Cancelling Low-Noise Amplifier[J].Journal of Chengdu University of Information Technology,2025,40(02):132-136.[doi:10.16836/j.cnki.jcuit.2025.02.002]
一种宽带有源前馈噪声消除CMOS低噪声放大器
- Title:
- A Broadband Active-Feedforward Noise-Cancelling Low-Noise Amplifier
- 文章编号:
- 2096-1618(2025)02-0132-05
- 分类号:
- TN722.3
- 文献标志码:
- A
- 摘要:
- 提出一种单端结构的宽带低噪声放大器。基于传统的共栅和共源噪声消除结构,引入有源前馈电路提升共栅级输入跨导,并降低直流电流,从而负载电阻可以适当增加以降低其噪声输出,保证电路整体更低的噪声指数; 同时,提出改进的n/pMOS互补结构方案,有效提高线性度并降低了功耗。为把电路设计成宽带,在输入级和输出级均采用π型匹配网络。使用Cadence Spectre-RF基于TSMC 65 nm CMOS工艺进行仿真。结果显示:在1～12 GHz带宽内,增益为14～17 dB,噪声系数为2.45～3.45 dB; 在5 GHz时,IIP3和IIP2的线性度分别为-2.4 dBm和23 dBm; 电路仅消耗7.8 mW,芯片面积0.21 mm2。
- Abstract:
- A single-ended broadband low-noise amplifier is proposed. Based on a traditional common-gate and common-source noise cancellation structure, an active feed-forward stage is used to reduce the DC of the common-gate branch and boost input transconductance. Accordingly, a larger resistive load is allowed to inhibit its noise output and maintain the overall low NF of LNA. Meanwhile, an improved complementary n/pMOS structure is applied to enhance linearity and halve power consumption. For broadband design targets,π-type matching networks are used in both the input stage and the output stage. Cadence Specter-RF is used for simulation based on the TSMC 65 nm CMOS process. The results show a gain of 14-17 dB and a noise figure of 2.45-3.45 dB within a bandwidth of 1-12 GHz. The linearity of IIP3 and IIP2 are -2.4 and 23 dBm at 5 GHz. The circuit consumes only 7.8 mW,the chip area is 0.21 mm2.
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备注/Memo
收稿日期:2023-10-19
基金项目:国家自然科学基金资助项目(61871073)
通信作者:郭本青.E-mail:rficgbq@gmail.com