Switching-mode CMOS power amplifier using a differentially coupled series inductor
- Authors
- 이창현; 박창근
- Issue Date
- Jan-2019
- Publisher
- Electromagnetics Academy
- Citation
- Progress in Electromagnetics Research Letters, v.81, pp.59 - 64
- Journal Title
- Progress in Electromagnetics Research Letters
- Volume
- 81
- Start Page
- 59
- End Page
- 64
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/30832
- ISSN
- 1937-6480
- Abstract
- In this work, we propose a compact CMOS power amplifier using a differentially coupled series inductor for motion detection radar applications. The proposed switching-mode power amplifier is designed with a cascode and differential structure. To realize a compact size matching network, a differentially coupled series inductor is used in the input matching network. In the proposed power amplifier, two typical spiral series inductors for the input matching network are replaced with a single differentially coupled series inductor. As a result, the used chip area of the differentially coupled series inductor is smaller than half that of a typical inductor for the given inductances of each inductor. Additionally, to obtain a high gain characteristic, we adapt modified mode-locking techniques for the power stage of the power amplifier. To verify the feasibility of the power amplifier, we design a 9.5-GHz power amplifier with a 130-nm RFCMOS process. We obtain saturation power of 15 dBm while the power-added efficiency is approximately 28%. © 2019, Electromagnetics Academy. All rights reserved.
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