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1. WO2007105282 - ゲイン可変増幅器

公開番号 WO/2007/105282
公開日 20.09.2007
国際出願番号 PCT/JP2006/304796
国際出願日 10.03.2006
IPC
H03G 3/10 2006.01
H電気
03基本電子回路
G増幅の制御
3増幅器または周波数変換器の利得制御
02手動制御
04非同調増幅器におけるもの
10半導体装置をもつもの
H03F 3/45 2006.01
H電気
03基本電子回路
F増幅器
3増幅素子として電子管のみまたは半導体装置のみをもつ増幅器
45差動増幅器
H03F 3/68 2006.01
H電気
03基本電子回路
F増幅器
3増幅素子として電子管のみまたは半導体装置のみをもつ増幅器
68増幅器の組み合わせ,例.立体音用多チャネル増幅器
CPC
H03F 2203/45052
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2203Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
45Indexing scheme relating to differential amplifiers
45052the cascode stage of the cascode differential amplifier being controlled by a controlling signal, which controlling signal can also be the input signal
H03F 2203/45302
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2203Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
45Indexing scheme relating to differential amplifiers
45302the common gate stage of a cascode dif amp being controlled
H03F 2203/45311
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2203Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
45Indexing scheme relating to differential amplifiers
45311the common gate stage of a cascode dif amp being implemented by multiple transistors
H03F 2203/45361
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2203Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
45Indexing scheme relating to differential amplifiers
45361the AAC comprising multiple transistors parallel coupled at their drains only, e.g. in a cascode dif amp, only those forming the composite common source transistor
H03F 2203/45364
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2203Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
45Indexing scheme relating to differential amplifiers
45364the AAC comprising multiple transistors parallel coupled at their gates and sources only, e.g. in a cascode dif amp, only those forming the composite common source transistor
H03F 2203/45366
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2203Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
45Indexing scheme relating to differential amplifiers
45366the AAC comprising multiple transistors parallel coupled at their gates only, e.g. in a cascode dif amp, only those forming the composite common source transistor
出願人
  • 富士通株式会社 FUJITSU LIMITED [JP/JP]; 〒2118588 神奈川県川崎市中原区上小田中4丁目1番1号 Kanagawa 1-1, Kamikodanaka 4-chome, Nakahara-ku, Kawasaki-shi, Kanagawa 2118588, JP (AllExceptUS)
  • 荒井 知之 ARAI, Tomoyuki [JP/JP]; JP (UsOnly)
発明者
  • 荒井 知之 ARAI, Tomoyuki; JP
代理人
  • 大菅 義之 OSUGA, Yoshiyuki; 〒1020084 東京都千代田区二番町8番地20 二番町ビル3F Tokyo 3rd Fl., Nibancho Bldg., 8-20, Nibancho, Chiyoda-ku, Tokyo 1020084, JP
優先権情報
公開言語 (言語コード) 日本語 (JA)
出願言語 (言語コード) 日本語 (JA)
指定国 (国コード)
発明の名称
(EN) VARIABLE GAIN AMPLIFIER
(FR) AMPLIFICATEUR A GAIN VARIABLE
(JA) ゲイン可変増幅器
要約
(EN)
The gain of an amplifier, e.g. a differential amplifier, is controlled without varying the input impedance. A variable gain amplifier comprises a plurality of differential amplifiers connected in parallel, and a plurality of signal switching means corresponding to the differential amplifiers, respectively, for switching a positive-phase differential signal and a negative-phase differential signal. Two outputs from each signal switching means are connected with the positive-phase input terminal and the negative-phase input terminal of each differential amplifier, and either the positive-phase differential signal or the negative-phase differential signal is provided as an input signal.
(FR)
Selon l'invention, le gain d'un amplificateur, par exemple d'un amplificateur différentiel, est régulé sans variation de l'impédance d'entrée. Un amplificateur à gain variable comprend une pluralité d'amplificateurs différentiels reliés en parallèle et une pluralité de moyens de commutation de signal correspondant respectivement aux amplificateurs différentiels afin de commuter un signal différentiel de phase positive et un signal différentiel de phase négative. Deux sorties provenant de chaque moyen de commutation de signal sont reliées à la borne d'entrée de phase positive et à la borne d'entrée de phase négative de chaque amplificateur différentiel et, soit le signal différentiel de phase positive, soit le signal différentiel de phase négative est fourni en tant que signal d'entrée.
(JA)
 入力インピーダンスを変化させることなく、増幅器、例えば差動増幅器のゲインを制御可能にすることを目的とし、並列に接続された複数の差動増幅器と、各差動増幅器に対応し、正相差動信号と逆相差動信号との切替を行う複数の信号切替手段とを備え、各信号切替手段の2つの出力が、各差動増幅器の正相入力端子と逆相入力端子に接続され、入力信号として正相差動信号、または逆相差動信号のいずれかを与える。
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