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http://dx.doi.org/10.6109/jkiice.2019.23.6.726

Differential 2.4-GHz CMOS Power Amplifier Using an Asymmetric Differential Inductor to Improve Linearity  

Jang, Seongjin (School of Electronic Engineering, Soongsil University)
Lee, Changhyun (School of Electronic Engineering, Soongsil University)
Park, Changkun (School of Electronic Engineering, Soongsil University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.23, no.6, 2019 , pp. 726-732 More about this Journal
Abstract
In this study, we proposed an asymmetric differential inductor to improve the linearity of differential power amplifiers. Considering the phase error between differential signals of the differential amplifier, the location of the center tap of the differential inductor was modified to minimize the error. As a result, the center tap was positioned asymmetrically inside the differential inductor. With the asymmetric differential inductor, the AM-to-AM and AM-to-PM distortions of the amplifier were suppressed. To confirm the feasibility of the inductor, we designed a 2.4 GHz differential CMOS PA for IEEE 802.11n WLAN applications with a 64-quadrature amplitude modulation (QAM), 9.6 dB peak-to-average power ratio (PAPR), and a bandwidth of 20 MHz. The designed power amplifier was fabricated using the 180-nm RF CMOS process. The measured maximum linear output power was 17 dBm, whereas EVM was 5%.
Keywords
ac ground; amplifier; center-tap; differential; inductor;
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1 W.-J. Lin, P.-S. Huang, J.-H. Cheng, J.-H. Tsai, H. Alsuraisry, and T.-W. Huang, "A dual-band class-E power amplifier with concurrent matching network in 0.18-${\mu}m$ CMOS," Microwave and Optical Technology Letters, vol. 60, no. 7, pp. 1672-1675, Jul. 2018.   DOI
2 J. H. Tsai, and J. W. Wang, "An X-Band Half-Watt CMOS Power Amplifier Using Interweaved Parallel Combining Transformer," IEEE Microwave and Wireless Components Letters, vol. 27, no. 5, pp. 491-493, May. 2017.   DOI
3 J. Kim, "Linear CMOS power amplifier using continuous gate voltage control," Microwave and Optical Technology Letters, vol. 60, no. 2, pp. 337-341, Feb. 2018.   DOI
4 B. Jin, Y. Kim, J. L. Woo, S. Park, H. Park, and Y. Kwon, "A linear LTE advanced CMOS RF power amplifier with integrated phase linearizer," Microwave and Optical Technology Letters, vol. 59, no. 5, pp. 1119-1122, May. 2017.   DOI
5 C. Lee, and C. Park, "Switching-Mode CMOS Power Amplifier Using a Differentially Coupled Series Inductor," Progress In Electromagnetics Research Letters, vol. 81, pp. 59-64, Jan. 2019.   DOI
6 J. Yoo, S. Yoon, C. Lee, and C. Park, "Analysis of Shoot-Through Current of Supply Modulator for Envelope-Tracking Techniques," Microwave and Optical Technology Letters, vol. 57, no. 7, pp. 1579-1583, Jul. 2015.   DOI
7 C. Zhai, and K. K. M. Cheng, "Dual-Mode CMOS RF Power Amplifier Design Using a Novel Reconfigurable Single-Switch Single-Inductor Balun," IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 10, pp. 4585-4594, Oct. 2018.   DOI
8 S. Kang, D. Baek, and S. Hong, "A 5-GHz WLAN RF CMOS Power Amplifier With a Parallel-Cascoded Configuration and an Active Feedback Linearizer," IEEE Transactions on Microwave Theory and Techniques, vol. 65, no. 9, pp. 3230-3244, Sep. 2017.   DOI
9 H. Hwang, C. Lee, J. Park, and C. Park, "A Current-Shared Cascade Structure With an Auxiliary Power Regulator for Switching Mode RF Power Amplifiers," IEEE Transactions on Microwave Theory and Techniques, vol. 62, no. 11, pp. 2711-2722, Nov. 2014.   DOI
10 Y. Sim, J. Park, J. Yoo, C. Lee, and C. Park, "A CMOS Power Amplifier Using an Active Balun as a Driver Stage to Enhance Its Gain," Microelectronics Journal, vol. 63, pp. 160-169, May. 2017.   DOI
11 M. Son, J. Yoo, I. Kang, C. Lee, J. Kim, H. J. Park, Y. B. Park, and C. Park, "RF CMOS Power Amplifier Using a Split Inter-Stage Inductor for IEEE 802.11n Applications," International Journal of Microwave and Wireless Technologies, vol. 9, no. 4, pp. 719-727, May. 2017.   DOI