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US5093922A
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Receiving apparatus for receiving a bs-if signal converted into a superhigh band or uhf band
Assignee: Panasonic Holdings Corp
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Filing: 1988-11-29
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Granted: 1992-03-03
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Expires: 2008-11-29
Abstract
Abstract PCT No. PCT/JP88/01203 Sec. 371 Date Jul. 18, 1989 Sec. 102(e) Date Jul. 18, 1989 PCT Filed Nov. 29, 1988 PCT Pub. No. WO89/05548 PCT Pub. Date Jun. 15, 1989.The present invention relates to a receiving apparatus which can be used in receiving a satellite broadcast by using a cable television system. The receiving apparatus uses a double-super type converter or tuner (2) having a first frequency-conversion portion (15) and a second frequency-conversion portion (19). A conversion output terminal (G) for feeding a signal to a BS tuner (5) is provided at the output side of the first frequency-conversion portion (15). A BA signal converted into a UHF band or a superhigh band is fed to the first frequency-conversion portion (15) through a cable, so that, after frequency conversion, a BS-IF signal is taken out from the conversion output terminal (G). Thus, the BS-IF signal can be fed to the BS tuner (5) without using any special up-converter.
Inventors
- 👤 Kazuhiko Kubo
- 👤 Akira Usui
- 👤 Minoru Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:04
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/26; H03; H03D; H03D7/00; H03D7/16; H03D7/161; H04N; H04N7/00; H04N7/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
178 words
A receiving apparatus comprising: an input terminal for receiving an input signal including a BS-IF signal converted into one of a superhigh-band and a UHF-band signal; a plurality of band-pass filters for filtering said input signal from said input terminal, said input signal being passed through said band-pass filters band by band; a first local oscillator having a variable oscillation frequency and for generating an output signal; a first mixer receiving an output signal from one of said band-pass filters and said output signal from said first local oscillator and providing an output signal comprising a first intermediate frequency signal; a second local oscillator having a fixed oscillation frequency and for generating an output signal; a second mixer receiving an output signal from said first mixer and said output signal from said second local oscillator and providing an output signal comprising a second intermediate frequency signal; and an output terminal connected directly to an output end of said first mixer, whereby said BS-IF signal converted into the superhigh-band or UHF-band is up-converted and outputted from said output terminal.
Claim 2
Dependent Claim
178 words
A receiving apparatus comprising: an input terminal for receiving an input signal including a BS-IF signal converted into one of a superhigh-band and a UHF-band signal; a plurality of band-pass filters for filtering said input signal from said input terminal, said input signal being passed through said band-pass filters band by band; a first local oscillator having a variable oscillation frequency and for generating an output signal; a first mixer receiving an output signal from one of said band-pass filters and said output signal from said first local oscillator and providing an output signal comprising a first intermediate frequency signal; a second local oscillator having a fixed oscillation frequency and for generating an output signal; a second mixer receiving an output signal from said first mixer and said output signal from said second local oscillator and providing an output signal comprising a second intermediate frequency signal; and an output terminal connected directly to an output end of said first mixer, whereby said BS-IF signal converted into the superhigh-band or UHF-band is up-converted and outputted from said output terminal.
Claim 3
Dependent Claim
184 words
A receiving apparatus comprising: an input terminal for receiving an input signal including a BS-IF signal converted into one of a superhigh-band and a UHF-band signal; a plurality of band-pass filters for filtering said input signal from said input terminal, said input signal being passed through said band-pass filters band by band; a first local oscillator having a variable oscillation frequency and for generating an output signal; a first mixer receiving an output signal from one of said band-pass filters and said output signal from said first local oscillator and providing an output signal comprising a first intermediate frequency signal; a second local oscillator having a fixed oscillation frequency and for generating an output signal; a second mixer receiving an output signal from said first mixer and said output signal from said second local oscillator and providing an output signal comprising a second intermediate frequency signal; an impedance converter; and an output terminal connected via said impedance converter to an output end of said first mixer, whereby said BS-IF signal converted into the superhigh-band or UHF-band is up-converted and outputted from said output terminal.
Claim 4
Dependent Claim
184 words
A receiving apparatus comprising: an input terminal for receiving an input signal including a BS-IF signal converted into one of a superhigh-band and a UHF-band signal; a plurality of band-pass filters for filtering said input signal from said input terminal, said input signal being passed through said band-pass filters band by band; a first local oscillator having a variable oscillation frequency and for generating an output signal; a first mixer receiving an output signal from one of said band-pass filters and said output signal from said first local oscillator and providing an output signal comprising a first intermediate frequency signal; a second local oscillator having a fixed oscillation frequency and for generating an output signal; a second mixer receiving an output signal from said first mixer and said output signal from said second local oscillator and providing an output signal comprising a second intermediate frequency signal; an impedance converter; and an output terminal connected via said impedance converter to an output end of said first mixer, whereby said BS-IF signal converted into the superhigh-band or UHF-band is up-converted and outputted from said output terminal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |