Title:
TUNER FOR TELEVISION
Document Type and Number:
Japanese Patent JPH0964769
Kind Code:
A
Abstract:
To select an object broadcast channel among lots of adjacent broadcast channels without any crosstalk even if a single conversion tuner is used.
An input selection circuit for a UHF tuner 100 is configured by using a dual tuning circuit consisting of single tuning circuits 15, 16 coupled with an input side by a matching circuit 14 having a varactor diode. Since a disturbing signal applied to all active elements of the post-stage is considerably reduced, even when a single conversion tuner is in use, a broadcast signal of a desired channel is sharply selected from CATV signals of multi-channel without disturbance of broadcast signals of other channels.
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Inventors:
YAMAGATA YUICHIRO
Application Number:
JP21167095A
Publication Date:
March 07, 1997
Filing Date:
August 21, 1995
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
H04B1/18; H04N5/44; (IPC1-7): H04B1/18; H04N5/44
Attorney, Agent or Firm:
Takashi Honda