Double super tuner
AssigneeKabushiki Kaisha Toshiba
InventorsShuji Abe, Yuji Ono, Kazuyoshi Yoshida, Takeshi Tokunaga
Life of this patent
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Abstract
A double super tuner for receiving television signals from conventional broadcast, CATV, satellite broadcast, and HDTV. A first frequency converter converts an input high-frequency signal in a first intermediate frequency band signal based on a first local oscillator signal. The output of the first frequency converter is band-pass filtered by a dielectric filter. A second frequency converter converts the output of the dielectric filter into a second intermediate frequency band signal based on a second local oscillator signal.
Claims2
A double super tuner including a tuner circuit, the tuner circuit comprising:
- first frequency converting means for combining an input high-frequency signal with a first local oscillation signal, thereby producing a first intermediate-frequency signal;
- second frequency converting means for combining the first intermediate-frequency signal with a second local oscillation signal, thereby producing a second intermediate-frequency signal;
- a printed circuit board having a first surface and a second surface, the first surface being structured for mounting the first and second frequency converting means;
- at least one on-surface mounting component and at least one insertion component, the on-surface mounting component being mounted on a circuit pattern of the first surface and the insertion component being inserted into the printed circuit board through the circuit pattern;
- and
- an earth pattern being formed on a majority of an area of the second surface.
A double super tuner including a tuner circuit, the tuner circuit comprising:
- first frequency converting means for combining an input high-frequency signal with a first local oscillation signal, thereby producing a first intermediate-frequency signal;
- second frequency converting means for combining the first intermediate-frequency signal with a second local oscillation signal, thereby producing a second intermediate-frequency signal;
- a printed circuit board having a first surface and a second surface, the first surface being structured for mounting the first and second frequency converting means;
- at least one an on-surface mounting component and at least one insertion component, the on-surface mounting component being mounted on a circuit pattern of the first surface and the insertion component being inserted into the printed circuit board through the circuit pattern, and
- an earth pattern being formed on a majority of an area of the second surface, the insertion component being attachable to the second surface on which the earth pattern is formed.
Dependencies are inferred from the claim text.