Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Wangmyong Woo"'
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 60:301-310
This paper proposes a new vector-sum type variable-phase shifter (VPS) topology for predistorting the phase of a modulated signal for an analog-predistortion power amplifier system. It has a continuous linear-in-degree control curve over a 90° phase
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6dfbd4ac3ebe9f01aee1b7862f47c3e5
https://doi.org/10.1109/tmtt.2011.2177856
https://doi.org/10.1109/tmtt.2011.2177856
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 60:68-76
To predistort the signal of an analog-predistortion power amplifier system, this paper proposes a variable gain amplifier (VGA) topology that gives an optimized linearity and bandwidth performance while having a continuous, linear-in-decibel gain con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::409c002e93df2da022b155de1f977606
https://doi.org/10.1109/tmtt.2011.2175234
https://doi.org/10.1109/tmtt.2011.2175234
Publikováno v:
IEEE Journal of Solid-State Circuits. 46:1023-1033
Several approaches to design a linear attenuator have been analyzed in terms of the transistor impedance variation, linearity, frequency responses, and circuit complexity. This paper proposes a novel method of using an adaptive bootstrapped body bias
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65d62473f182f7801f3a52d090a06812
https://doi.org/10.1109/jssc.2011.2117530
https://doi.org/10.1109/jssc.2011.2117530
Autor:
Dong Ho Lee, Ki Seok Yang, Chang-Ho Lee, Haksun Kim, J. Laskar, Jae Joon Chang, Ockgoo Lee, Jeonghu Han, Youn Suk Kim, Wangmyong Woo, Hyungwook Kim, Kyu Hwan An
Publikováno v:
IEEE Journal of Solid-State Circuits. 43:1064-1075
Fully integrated CMOS power amplifiers (PAs) with parallel power-combining transformer are presented. For the high power CMOS PA design, two types of transformers, series-combining and parallel-combining, are fully analyzed and compared in detail to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d416963e567647392d7d74ec31041b6f
https://doi.org/10.1109/jssc.2008.920349
https://doi.org/10.1109/jssc.2008.920349
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 53:229-237
This paper presents an adaptive wide-band digitally controlled RF envelope predistortion linearization system for power amplifiers (PAs). A field-programmable gate-array-based lookup table is indexed by a digitized envelope power signal, and instanta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3dad8f8ac91740f4a79d3afcb96b40c8
https://doi.org/10.1109/tmtt.2004.839306
https://doi.org/10.1109/tmtt.2004.839306
Publikováno v:
2010 IEEE Radio Frequency Integrated Circuits Symposium.
A wide bandwidth, highly linear variable attenuator designed in 0.18µm triple-well CMOS process is presented. This attenuator is based on three cascade π-networks with body voltage distribution scheme to minimize the effects of the input power leve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::334653604390bc838df600f86fd675f8
https://doi.org/10.1109/rfic.2010.5477366
https://doi.org/10.1109/rfic.2010.5477366
Autor:
Haksun Kim, Wangmyong Woo, Youn Suk Kim, Hyungwook Kim, J. Laskar, Kyu Hwan An, Jae Joon Chang, Ockgoo Lee, Ki Seok Yang, Chang-Ho Lee
Publikováno v:
2007 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium.
In this paper, a novel monolithic voltage-boosting parallel-primary transformer is presented for the fully integrated CMOS power amplifier design. Multiple primary loops are interweaved in parallel to combine the AC currents from multiple power devic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5f0dfe9077d4e2001b31b25730e70a7
https://doi.org/10.1109/rfic.2007.380914
https://doi.org/10.1109/rfic.2007.380914
Autor:
J. Laskar, Ki Seok Yang, Chang-Ho Lee, Kyu Hwan An, Youn Suk Kim, Hyungwook Kim, Wangmyong Woo, Jae Joon Chang, Ockgoo Lee
Publikováno v:
2007 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium.
This paper newly presents a push-pull parallel-combined CMOS power amplifier (PA) and its analysis of operation. The proposed class-E CMOS PA incorporates the push-pull parallel-combined power devices with the 1:1:2 (two single-turn primary windings
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f17be66c2c00d607b02230d87a55eb3
https://doi.org/10.1109/rfic.2007.380918
https://doi.org/10.1109/rfic.2007.380918
Autor:
Kiseok Yang, Jae Joon Chang, Chang-Ho Lee, Wangmyong Woo, Mi Jeong Park, Ockgoo Lee, Haksun Kim, Kyu Hwan An, Joy Laskar
Publikováno v:
2006 Asia-Pacific Microwave Conference.
This paper presents a new polar transmitter architecture that employs analog predistortion to provide substantially instantaneous correction of amplitude and phase errors in RF PAs. This approach enables to enhance the linear output power capability
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e14f948255f595c68ba638335b1dec7c
https://doi.org/10.1109/apmc.2006.4429601
https://doi.org/10.1109/apmc.2006.4429601
Autor:
Byung-Sung Kim, Jae Joon Chang, Kiseok Yang, Chang-Ho Lee, Joy Laskar, Wangmyong Woo, Minsik Ahn
Publikováno v:
2006 Asia-Pacific Microwave Conference.
A novel dual-band CMOS SP4T switch with P1dB of higher than 31 dBm is designed to operate at 0.9 GHz and 1.8 GHz. In the Rx switch path, a carefully designed switched resonator is incorporated in order to block high RF signal power from the power amp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09247718c434dfd2b89175681f8f9bf7
https://doi.org/10.1109/apmc.2006.4429368
https://doi.org/10.1109/apmc.2006.4429368