Title:
VARIABLE ATTENUATOR
Document Type and Number:
WIPO Patent Application WO/2003/088477
Kind Code:
A1
Abstract:
A variable attenuator comprises a series circuit unit having a first switch transistor and a first resistor which are connected in parallel, a first parallel circuit unit having a second switch transistor and a second resistor which are connected in series, and a second parallel circuit unit having a third switch transistor and a third resistor which are connected in series. At least one of the first parallel circuit unit and the second parallel circuit unit has a reactance element for phase correction which corrects the passing phase difference of high frequency signals transmitted from an input terminal to an output terminal.
Inventors:
TANIGUCHI EIJI (JP)
SAWAUMI CHIEMI (JP)
SUEMATSU NORIHARU (JP)
MAEDA KENICHI (JP)
IKUSHIMA TAKAYUKI (JP)
SAWAUMI CHIEMI (JP)
SUEMATSU NORIHARU (JP)
MAEDA KENICHI (JP)
IKUSHIMA TAKAYUKI (JP)
Application Number:
PCT/JP2002/007558
Publication Date:
October 23, 2003
Filing Date:
July 25, 2002
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
TANIGUCHI EIJI (JP)
SAWAUMI CHIEMI (JP)
SUEMATSU NORIHARU (JP)
MAEDA KENICHI (JP)
IKUSHIMA TAKAYUKI (JP)
TANIGUCHI EIJI (JP)
SAWAUMI CHIEMI (JP)
SUEMATSU NORIHARU (JP)
MAEDA KENICHI (JP)
IKUSHIMA TAKAYUKI (JP)
International Classes:
H03H7/24; H03H11/20; H03H11/24; (IPC1-7): H03H7/24; H03H11/24
Foreign References:
| JPH10173464A | 1998-06-26 | |||
| JPS5410647A | 1979-01-26 | |||
| JPH0262102A | 1990-03-02 | |||
| JPH0461925U | 1992-05-27 | |||
| JPH0288321U | 1990-07-12 | |||
| JPH06177693A | 1994-06-24 | |||
| JPH11340771A | 1999-12-10 |
Other References:
KENSUKE NAKAJIMA ET AL.: "Ku tai 6 bit MMIC kahen genseuiki", 1999 NEN THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS ELECTRONICS SOCIETY TAIKAI KOEN RONBUNSHU 1, 16 August 1999 (1999-08-16), (LECTURE NO.C-2-24), pages 53, XP002969420
Attorney, Agent or Firm:
Tazawa, Hiroaki (Kasumigaseki 3-Chome Chiyoda-ku, Tokyo, JP)
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