采用电流复用和器件复用正并联反馈技术的低功率亚GHz宽带LNA

IF 2.9 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Microwave and Wireless Components Letters Pub Date : 2022-12-01 DOI:10.1109/LMWC.2022.3191116

Kuang-Wei Cheng, Wei-Wei Chen, Shang-De Yang

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引用次数: 0

摘要

本文介绍了一种用于sub-GHz宽带应用的低功耗电流复用和器件复用低噪声放大器(LNA)。基于并联反馈共门(SFBCG)混合拓扑和提出的电流/设备复用并联反馈(SFB)技术，减轻了$g_{m}$的限制。此外，通过将输出耦合到同相电流源晶体管的栅极来激活正反馈而无需额外的功率负担，从而增加了设计自由度，从而实现了更高的增益和更低的噪声设计。该LNA原型采用90纳米CMOS技术，有效面积为0.075 mm2。测量结果表明，该系统的峰值增益为21.3 dB, 3db带宽为50-800 MHz，噪声系数为4.5 dB，三阶截距点(IIP3)为−7.1 dBm，功耗为1.2 mW。

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A Low Power Sub-GHz Wideband LNA Employing Current-Reuse and Device-Reuse Positive Shunt-Feedback Technique

This letter presents a low-power current-reuse and device-reuse low noise amplifier (LNA) for sub-GHz wideband applications. Based on the shunt-feedback common-gate (SFBCG) hybrid topology and the proposed current/device-reuse shunt-feedback (SFB) technique, $g_{m}$ restriction is alleviated. Moreover, the degree of design freedom is added by coupling the output to the gate of the in-phase current source transistor to activate positive feedback without extra power burden, thereby achieving a higher gain and lower noise design. Implemented in 90-nm CMOS technology, this LNA prototype has an active area of 0.075 mm2. The measurement results show a peak gain of 21.3 dB with 3-dB bandwidth of 50–800 MHz, noise figure of 4.5 dB, third-order intercept point (IIP3) of −7.1 dBm, and power dissipation of 1.2 mW.

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来源期刊

IEEE Microwave and Wireless Components Letters 工程技术-工程：电子与电气

自引率

13.30%

发文量

376

审稿时长

3.0 months

期刊介绍： The IEEE Microwave and Wireless Components Letters (MWCL) publishes four-page papers (3 pages of text + up to 1 page of references) that focus on microwave theory, techniques and applications as they relate to components, devices, circuits, biological effects, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, medical and industrial activities. Microwave theory and techniques relates to electromagnetic waves in the frequency range of a few MHz and a THz; other spectral regions and wave types are included within the scope of the MWCL whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design.