Title:
FEED-FORWARD AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2002/087078
Kind Code:
A1
Abstract:
A Vs (signal) + Vd (distortion) in a main amplifier output path (5) is combined by a power synthesizer (27) with an output G(W) W Vd from an auxiliary amplifier (26), and an error signal Ve (= Vs + (1 + G(W) W) Vd) is inputted from a directional coupler (33) to a control circuit (39) serving as an adaptive filter. Moreover, The output G(W) W Vd of the auxiliary amplifier (26) is extracted from a directional coupler (24) and is divided by a set value W outputted from the control circuit (39) by a divider (38), and G(W) VD is inputted as a reference signal of the control circuit (39).
Inventors:
HORIGUCHI KENICHI (JP)
OKAMURA ATUSHI (JP)
NAKAYAMA MASATOSHI (JP)
IKEDA YUKIO (JP)
OKAMURA ATUSHI (JP)
NAKAYAMA MASATOSHI (JP)
IKEDA YUKIO (JP)
Application Number:
PCT/JP2001/006181
Publication Date:
October 31, 2002
Filing Date:
July 17, 2001
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
HORIGUCHI KENICHI (JP)
OKAMURA ATUSHI (JP)
NAKAYAMA MASATOSHI (JP)
IKEDA YUKIO (JP)
HORIGUCHI KENICHI (JP)
OKAMURA ATUSHI (JP)
NAKAYAMA MASATOSHI (JP)
IKEDA YUKIO (JP)
International Classes:
H03F1/32; H04B1/04; (IPC1-7): H03G3/20; H03F1/32
Foreign References:
| JP2000031748A | 2000-01-28 | |||
| JPH11355057A | 1999-12-24 | |||
| JPH0470203A | 1992-03-05 |
Attorney, Agent or Firm:
Tazawa, Hiroaki (Kasumigaseki 3-chome Chiyoda-ku, Tokyo, JP)
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