US3882397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carrier converting equipment
Assignee: Japan Broadcasting Corp
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Filing: 1973-11-26
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Granted: 1975-05-06
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Expires: 1993-11-26
Abstract
Abstract A carrier converting equipment to be used such as for the reception of a satellite television broadcasting signal by an ordinary television receiver by adding a very simple adapter for converting such satallite signal for instance a frequency modulated microwave signal into an amplitude modulated VHF wave signal. The frequency modulated receiving input wave is amplitude modulated by an amplitude modulation adding circuit in which the wave is modulated for instance to have larger amplitude at the higher frequency portion and smaller amplitude at the lower frequency portion. This amplitude modulated wave is supplied to a non-linear element together with a desired carrier frequency signal. The carrier frequency signal is amplitude modulated in accordance with the amplitude of the applied amplitude modulated signal due to conductance variation of the non-linear element.
Inventors
- 👤 Yoshihiro Konishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:08
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03C; H03C1/00; H03C1/50; H03D7/00; H03D7/02; H03D9/0633; H03D9/0641
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
120 words
A carrier converting equipment for converting an amplitude modulated signal of a first carrier wave into a corresponding amplitude modulation signal of a second carrier wave of which the frequency is different from that of the first carrier wave, the equipment comprising; a non-linear element which is variable in conductance, means for applying said first and second carrier waves to said non-linear element, and means for deriving an amplitude modulated second carrier wave which is modulated in accordance with the variation of the conductance of said non-linear element, which variation corresponds to the amplitude variation of said amplitude modulated first carrier wave so that the second carrier wave is amplitude modulated according to the amplitude of the first carrier wave.
Claim 2
Dependent Claim
120 words
A carrier converting equipment for converting an amplitude modulated signal of a first carrier wave into a corresponding amplitude modulation signal of a second carrier wave of which the frequency is different from that of the first carrier wave, the equipment comprising; a non-linear element which is variable in conductance, means for applying said first and second carrier waves to said non-linear element, and means for deriving an amplitude modulated second carrier wave which is modulated in accordance with the variation of the conductance of said non-linear element, which variation corresponds to the amplitude variation of said amplitude modulated first carrier wave so that the second carrier wave is amplitude modulated according to the amplitude of the first carrier wave.
Claim 3
Dependent Claim
61 words
A carrier converting equipment as claimed in claim 1, further comprising an amplitude modulation adding circuit which modulates a frequency modulated input carrier wave in amplitude so as to produce an amplitude modulated carrier signal, which amplitude modulation corresponds to the frequency modulation of the input carrier wave, wherein the amplitude modulated carrier signal is used as the first carrier wave.
Claim 4
Dependent Claim
18 words
A carrier converting equipment as claimed in claim 1, wherein the non-linear element is a variable resistance diode.
Claim 5
Dependent Claim
18 words
A carrier converting equipment as claimed in claim 2, wherein the non-linear element is a variable resistance diode.
Claim 6
Dependent Claim
36 words
A carrier converting equipment as claimed in claim 1, wherein the first and second carrier waves are isolated from each other by series and/or parallel resonant circuits connected in series and/or parallel with said non-linear element.
Claim 7
Dependent Claim
36 words
A carrier converting equipment as claimed in claim 2, wherein the first and second carrier waves are isolated from each other by series and/or parallel resonant circuits connected in series and/or parallel with said non-linear element.
Claim 8
Dependent Claim
74 words
A carrier converting equipmeNt as claimed in claim 1, wherein the non-linear element is connected to a first terminal of a non-reciprocal element to which said first carrier wave is applied, the second carrier wave is applied to a second terminal of the non-reciprocal element and is fed to the non-linear element via the non-reciprocal element and the amplitude modulated second carrier wave is derived out from a third terminal of the non-reciprocal element.
Claim 9
Dependent Claim
74 words
A carrier converting equipment as claimed in claim 2, wherein the non-linear element is connected to a first terminal of a non-reciprocal element to which said first carrier wave is applied, the second carrier wave is applied to a second terminal of the non-reciprocal element and is fed to the non-linear element via the non-reciprocal element and the amplitude modulated second carrier wave is derived out from a third terminal of the non-reciprocal element.
Claim 10
Dependent Claim
16 words
A carrier converting equipment as claimed in claim 7, wherein the non-reciprocal element is a circulator.
Claim 11
Dependent Claim
16 words
A carrier converting equipment as claimed in claim 8, wherein the non-reciprocal element is a circulator.
Claim 12
Dependent Claim
18 words
A carrier converting equipment as claimed in claim 7, wherein the non-reciprocal circuit is a -3dB directional coupler.
Claim 13
Dependent Claim
18 words
A carrier converting equipment as claimed in claim 8, wherein the non-reciprocal circuit is a -3dB directional coupler.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |