Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Yasuhiko Kuriyama"'
Autor:
Shouhei Kousai, Kohei Onizuka, Junji Wadatsumi, Takashi Yamaguchi, Yasuhiko Kuriyama, Masami Nagaoka
Publikováno v:
ISSCC
One of the ultimate goals in power amplifier design is to enhance the effective efficiency and achieve a long battery life. Therefore, both the peak efficiency and the efficiency loss due to antenna impedance mismatch or power back-off are highly cri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6a7fdd7e7e055c3d3fc485541e03ac8
https://doi.org/10.1109/jssc.2014.2361322
https://doi.org/10.1109/jssc.2014.2361322
Publikováno v:
ISSCC
A low-cost, fully integrated CMOS PA is attractive. The main challenge is to improve its power efficiency. Although many linearization and efficiency improvement techniques have been proposed, most of these techniques are based on feed-forward, which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51c68fb474d9e238479b67db85eaf0a0
https://doi.org/10.1109/jssc.2012.2217833
https://doi.org/10.1109/jssc.2012.2217833
Publikováno v:
IEICE Transactions on Electronics. :1678-1684
This paper presents a miniaturized dual-mode Doherty PA module applicable for an HPSK signal and an OFDM 64-QAM signal. Dual-mode operation with identical hardware is realized by introducing a bias switching technique, which changes bias conditions o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::981d45fbc6a07006c744c8a9f113277b
https://doi.org/10.1093/ietele/e90-c.9.1678
https://doi.org/10.1093/ietele/e90-c.9.1678
Publikováno v:
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences. :310-316
Recently, the Doherty amplifier technique has been the focus of attention not only for base stations but also for mobile terminals because of its high power-added efficiency in the large back-off region. In this paper, we present a miniaturized Doher
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59f6f8e8589f46dad3cad3fa042fafc9
https://doi.org/10.1093/ietfec/e90-a.2.310
https://doi.org/10.1093/ietfec/e90-a.2.310
Publikováno v:
2014 IEEE International Solid-State Circuits Conference Digest of Technical Papers (ISSCC).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b3378464ebe18f0021190b4f179e7bd
https://doi.org/10.1109/isscc.2014.6757336
https://doi.org/10.1109/isscc.2014.6757336
Autor:
Kunio Tsuda, Norio Iizuka, Tohru Sugiyama, Sadato Hongo, J. Akagi, M. Obara, Yasuhiko Kuriyama
Publikováno v:
IEEE Journal of Solid-State Circuits. 30:1051-1054
In this paper, we report two types of broad-band amplifiers implemented with AlGaAs/GaAs HBT's. One is a Darlington feedback amplifier and the other is a transimpedance amplifier. In the former circuit, a dc gain of 9.5 dB and a -3-dB bandwidth of 40
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a2dc5b54b855c8dcb8f38113a1595b8a
https://doi.org/10.1109/4.466080
https://doi.org/10.1109/4.466080
Publikováno v:
IEEE Journal of Solid-State Circuits. 26:876-879
High-speed 2-b monolithic integrated multiplexer (MUX) and demultiplexer (DMUX) circuits have been developed using self-aligned AlGaAs/GaAs heterojunction bipolar transistors (HBTs) with improved high-speed performance. Both ICs were designed using e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52b3c921a89bfe489b5381564d0bd237
https://doi.org/10.1109/4.78277
https://doi.org/10.1109/4.78277
Publikováno v:
2006 Asia-Pacific Microwave Conference.
A Doherty power amplifier (PA) module for mobile terminals with variable linearity function has been developed. The linearity of the Doherty PA module is optimized according to transmission signals by a bias switching technique. The Doherty amplifier
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d3b85492d44bf3a9128bcfab767f25f
https://doi.org/10.1109/apmc.2006.4429776
https://doi.org/10.1109/apmc.2006.4429776
Publikováno v:
2005 Asia-Pacific Microwave Conference Proceedings.
A miniaturized Doherty power amplifier (PA) module for mobile terminals has been developed. Two GaAs HBTs and base bias circuits for a carrier amplifier and a peak amplifier are integrated onto a single chip GaAs MMIC (1.0 mm /spl times/ 1.0 mm /spl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16a136b6aee1e44a0c988a298f9c2b37
https://doi.org/10.1109/apmc.2005.1606223
https://doi.org/10.1109/apmc.2005.1606223
Autor:
Norio Iizuka, Sadato Hongo, M. Obara, Yasuhiko Kuriyama, Tohru Sugiyama, Kunio Tsuda, J. Akagi
Publikováno v:
Proceedings of 1994 IEEE GaAs IC Symposium.
In this paper, we report two types of broad-band amplifiers implemented with AlGaAs/GaAs HBT's. One is a Darlington feedback amplifier and the other is a transimpedance amplifier. In the former circuit, a DC gain of 9.5 dB and a -3 dB bandwidth of 40
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71ec503c62a88a0913e75647f4f7b53a
https://doi.org/10.1109/gaas.1994.636988
https://doi.org/10.1109/gaas.1994.636988