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Machine translation
1. (WO2002003545) HIGH-FREQUENCY AMPLIFIER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2002/003545    International Application No.:    PCT/JP2001/005666
Publication Date: 10.01.2002 International Filing Date: 29.06.2001
IPC:
H03F 1/02 (2006.01), H03F 1/30 (2006.01), H03F 1/32 (2006.01), H03F 3/19 (2006.01), H03F 3/193 (2006.01)
Applicants: MITSUBISHI DENKI KABUSHIKI KAISHA [JP/JP]; 2-3, Marunouchi 2-chome Chiyoda-ku, Tokyo 100-8310 (JP) (For All Designated States Except US).
SHINJO, Shintaro [JP/JP]; (JP) (For US Only).
MORI, Kazutomi [JP/JP]; (JP) (For US Only).
JOBA, Hiroyuki [JP/JP]; (JP) (For US Only).
NAGANO, Hiroaki [JP/JP]; (JP) (For US Only).
MOTIZUKI, Mitsuru [JP/JP]; (JP) (For US Only).
IKEDA, Yukio [JP/JP]; (JP) (For US Only).
SUEMATSU, Noriharu [JP/JP]; (JP) (For US Only)
Inventors: SHINJO, Shintaro; (JP).
MORI, Kazutomi; (JP).
JOBA, Hiroyuki; (JP).
NAGANO, Hiroaki; (JP).
MOTIZUKI, Mitsuru; (JP).
IKEDA, Yukio; (JP).
SUEMATSU, Noriharu; (JP)
Agent: TAZAWA, Hiroaki; 7F, Daito Bldg. 7-1, Kasumigaseki 3-chome. Chiyoda-ku, Tokyo 100-0013 (JP)
Priority Data:
PCT/JP00/04368 30.06.2000 JP
Title (EN) HIGH-FREQUENCY AMPLIFIER
(FR) AMPLIFICATEUR HAUTE FREQUENCE
Abstract: front page image
(EN)A high-frequency amplifying section (2) amplifies an input high-frequency signal with a transistor (12). A measuring circuit (27) measures the amplitude of the input high-frequency signal, and a bias controlling circuit (26) continuously controls the bias impressed on the transistor (12) according to the value of the amplitude measured by the measuring circuit (27). Thus, it is possible to suppress a sudden gain variation with a change in the amplitude of the input high-frequency signal.
(FR)L'invention concerne un amplificateur haute fréquence qui comprend une section d'amplification haute fréquence (2) amplifiant un signal haute fréquence au moyen d'un transistor (12), un circuit de mesure (27) mesurant l'amplitude du signal d'entrée haute fréquence et un circuit de commande de polarisation (26) commandant en continu la polarisation s'exerçant sur ce transistor (12), en fonction de la valeur d'amplitude mesurée par ce circuit de mesure (27). Il est ainsi possible d'éliminer une variation brusque du gain par un changement d'amplitude du signal d'entrée haute fréquence.
Designated States: JP, KR, US.
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR).
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)