A Wideband Common-Gate Low-Noise Amplifier Using Capacitive Feedback
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概要
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In this paper, a capacitive-cross-coupling common-gate (CCC-CG) LNA using capacitive feedback is proposed to improve the noise figure (NF). In the conventional CCC-CG LNA, the transconductance gm is determined by the input-matching condition while a lager gm is required to improve NF. gm of the proposed LNA can be increased and NF can be improved by using the added capacitive feedback. The analytical calculation shows that the proposed LNA can perform better than the conventional CCC-CG LNA. In the measurement results using a 0.18-µm CMOS technology, the gain is 10.4-13.4dB, NF is 2.7-2.9dB at 0.8-1.8GHz, and IIP3 is -7dBm at 0.8GHz. The power consumption is 6.5mW with a 1.8-V supply.
著者
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Okada Kenichi
Department Of Communications And Computer Engineering Kyoto University
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Matsuzawa Akira
Department Of Physical Electronics Graduate School Of Science And Engineering Tokyo Institute Of Technology
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Ito Toshihiko
Department Of Biological Resource Science Akita Prefectural University
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