Title:
ELECTRONIC TUNER AND PORTABLE TELEPHONE DEVICE USING THE SAME
Document Type and Number:
Japanese Patent JP2008141716
Kind Code:
A
Abstract:
To provide an electronic tuner of excellent reception sensitivity by reducing interference due to a transmission signal from a portable telephone during speech communication.
A high-frequency amplifier 26 inserted between a television input terminal 25 and a first filter 27 and having a current control input 26a for controlling a current value is provided, together with a current control unit 42 inserted between the output of the high-frequency amplifier 26 and the current control input 26a to controlling the current of a high-frequency amplifier 26 by detecting the transmission signal, and the current of the high-frequency amplifier 26 is set larger when the portable telephone 23 is sending the transmission signal.
Inventors:
NODA MASAAKI
IWASA MASAHARU
NANBA AKIHIKO
IWASA MASAHARU
NANBA AKIHIKO
Application Number:
JP2007037555A
Publication Date:
June 19, 2008
Filing Date:
February 19, 2007
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H04B1/16; H03H7/075; H03H7/48; H04N5/44
Domestic Patent References:
| JP2006237793A | 2006-09-07 | |||
| JP2006261998A | 2006-09-28 | |||
| JP2001292037A | 2001-10-19 | |||
| JPH0715391A | 1995-01-17 |
Foreign References:
| WO2006075465A1 | 2006-07-20 |
Attorney, Agent or Firm:
Fumio Iwahashi
Hiroki Naito
Daisuke Nagano
Hiroki Naito
Daisuke Nagano
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