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Title:
ELECTRONIC TUNER
Document Type and Number:
Japanese Patent JP3042230
Kind Code:
B2
Abstract:

PURPOSE: To provide an electronic tuner allowed to be used for a television receiver and capable of improving the lower side signal selecting characteristic of required tuning frequency
CONSTITUTION: In an input circuit 24 for the electronic tuner, the 1st and 2nd inductance elements 31, 34 are serially connected between the input side 30 and ground, a serial connection consisting of a varactor diode 32 and a capacitor 33 is connected to the element 34 in parallel and the 3rd inductance element 36 is connected between the node of the serial connection and the output side 35 so as to be adjusted. Thereby frequency can be corrected by the adjusting function at the time of receiving a high band, and since the element 36 is serially connected to the output side 35, the electronic tuner excellent in the lower side signal selecting a characteristic by which no anti-resonance frequency is generated on the lower side of tuning frequency.


Inventors:
Masanori Suzuki
Tetsuya Ozaki
Seiji Matsushita
Application Number:
JP34809392A
Publication Date:
May 15, 2000
Filing Date:
December 28, 1992
Export Citation:
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Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H03J3/08; H03J3/18; H03J3/20; H04B1/18; (IPC1-7): H03J3/08; H03J3/20; H04B1/18
Domestic Patent References:
JP51156703U
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)



 
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