US3706946A
Expired / Lapsed
US
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Deviation modifier
Assignee: Raytheon Co
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Filing: 1970-10-26
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Granted: 1972-12-19
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Expires: 1990-10-26
Abstract
Abstract A deviation modifier which utilizes the principle of synthetic phase isolation to extend or reduce the deviation on an incoming F.M. or P.M. signal. The modified deviation signal is then filtered and demodulated or interfaced at IF. This modifier permits IF interfacing of signals without demodulation and remodulation and IF demodulated provides threshold extension.
Inventors
- 👤 William J Bickford
- 👤 Richard G Cease
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:21
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3052; H03D; H03D3/00; H03D3/001; H03D3/003
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
A system for permitting modification of frequency deviation of F.M. and P.M. signals, said system comprising: means for receiving an incoming signal having one value of frequency; means for separating the incoming signal into two parallel branches; means for delaying the signals in each of said branches for predetermined time intervals; means for mixing the incoming signal to each branch together with the delayed signal from the other branch; means for providing an output signal from said branches, said output signal being modified in frequency from the frequency of the incoming signal in accordance with the predetermined time intervals of said delay means; and feedback means from said output signal means to said incoming signal receiving means, said feedback means maintaining the incoming signal at a fixed amplitude level.
Claim 2
Independent Claim
129 words
A system for permitting modification of frequency deviation of F.M. and P.M. signals, said system comprising: means for receiving an incoming signal having one value of frequency; means for separating the incoming signal into two parallel branches; means for delaying the signals in each of said branches for predetermined time intervals; means for mixing the incoming signal to each branch together with the delayed signal from the other branch; means for providing an output signal from said branches, said output signal being modified in frequency from the frequency of the incoming signal in accordance with the predetermined time intervals of said delay means; and feedback means from said output signal means to said incoming signal receiving means, said feedback means maintaining the incoming signal at a fixed amplitude level.
Claim 3
Dependent Claim
34 words
A system as set forth in claim 1 wherein said means for delaying the signals are bandpass filters which consider only the lower sidebands of the signals and provide the predetermined time delay intervals.
Claim 4
Independent Claim
145 words
A system for permitting modification of frequency deviation of F.M. and P.M. signals, said system comprising: means for receiving an incoming signal having one value of frequency; means for separating the incoming signal into two parallel branches; first and second means in each branch for delaying the signals in each of said branches for Predetermined time intervals; means in each branch for mixing the signal from said first delay means in that branch with the signal from the second delay means in the other branch; means for providing an output signal from said branches, said output signal being modified in frequency from the frequency of the incoming signal in accordance with the predetermined time intervals of said delay means; and feedback means from said output signal means to said incoming signal receiving means, said feedback means maintaining the incoming signal at a fixed amplitude level.
Claim 5
Independent Claim
145 words
A system for permitting modification of frequency deviation of F.M. and P.M. signals, said system comprising: means for receiving an incoming signal having one value of frequency; means for separating the incoming signal into two parallel branches; first and second means in each branch for delaying the signals in each of said branches for Predetermined time intervals; means in each branch for mixing the signal from said first delay means in that branch with the signal from the second delay means in the other branch; means for providing an output signal from said branches, said output signal being modified in frequency from the frequency of the incoming signal in accordance with the predetermined time intervals of said delay means; and feedback means from said output signal means to said incoming signal receiving means, said feedback means maintaining the incoming signal at a fixed amplitude level.
Claim 6
Independent Claim
259 words
A system for permitting modification of frequency deviation of F.M. and P.M. signals, said system comprising: means for receiving an incoming signal having one value of frequency; means for separating the incoming signal into two parallel branches; one of said branches including a first delay means for delaying the incoming signal a predetermined time, a mixing means to which the output of said first delay means is applied and a second delay means for delaying the signal from said mixing means a predetermined time; the other of said branches including a first delay means for delaying the incoming signal a predetermined time, a mixing means to which the output of said first delay means is applied and a second delay means for delaying the signal from said mixing means a predetermined time; said output from said second delay means of said one branch being mixed in said mixing means of said other branch with the signal from said first delay means of said other branch while said output from said second delay means of said other branch is mixed in said mixing means of said one branch with the signal from the first delay means of said one branch; means for providing an output signal from said branches, said output signal being modified in frequency from the frequency of the incoming signal in accordance with the predetermined time intervals of said delay means; and feedback means from said output signal means to said incoming signal receiving means, said feedback means maintaining the incoming signal at a fixed amplitude level.
Claim 7
Independent Claim
259 words
A system for permitting modification of frequency deviation of F.M. and P.M. signals, said system comprising: means for receiving an incoming signal having one value of frequency; means for separating the incoming signal into two parallel branches; one of said branches including a first delay means for delaying the incoming signal a predetermined time, a mixing means to which the output of said first delay means is applied and a second delay means for delaying the signal from said mixing means a predetermined time; the other of said branches including a first delay means for delaying the incoming signal a predetermined time, a mixing means to which the output of said first delay means is applied and a second delay means for delaying the signal from said mixing means a predetermined time; said output from said second delay means of said one branch being mixed in said mixing means of said other branch with the signal from said first delay means of said other branch while said output from said second delay means of said other branch is mixed in said mixing means of said one branch with the signal from the first delay means of said one branch; means for providing an output signal from said branches, said output signal being modified in frequency from the frequency of the incoming signal in accordance with the predetermined time intervals of said delay means; and feedback means from said output signal means to said incoming signal receiving means, said feedback means maintaining the incoming signal at a fixed amplitude level.
Claim 8
Dependent Claim
143 words
In combination: a first mixing means; a second mixing means; first means for coupling an input signal to said first mixing means and to said second mixing means; second means for coupling an output signal of said second mixing means to said first mixing means; and third means for coupling an output signal of said first mixing means to said second mixing means, said third coupling means delaying said output signal of said first mixing means, said first mixing means providing its output signal by mixing the signals coupled thereto by said first and said second coupling means, said second mixing means providing its output signal by mixing together the signals coupled thereto by said first and said third coupling means, and one of said signals coupled by said second and said third coupling means serving as an output signal of said combination.
Claim 9
Dependent Claim
143 words
In combination: a first mixing means; a second mixing means; first means for coupling an input signal to said first mixing means and to said second mixing means; second means for coupling an output signal of said second mixing means to said first mixing means; and third means for coupling an output signal of said first mixing means to said second mixing means, said third coupling means delaying said output signal of said first mixing means, said first mixing means providing its output signal by mixing the signals coupled thereto by said first and said second coupling means, said second mixing means providing its output signal by mixing together the signals coupled thereto by said first and said third coupling means, and one of said signals coupled by said second and said third coupling means serving as an output signal of said combination.
Claim 10
Dependent Claim
47 words
The combination according to claim 5 wherein said second coupling means delays said output signal of said second mixing means, and wherein said first coupling means delays said input signal coupled to said first mixing means relative to said input signal coupled to said second mixing means.
Claim 11
Dependent Claim
43 words
The combination according to claim 6 wherein said first coupling means includes gain control means responsive to said output signal of said combination for modifying the magnitude of said input signal in accordance with the magnitude of said output signal of said combination.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |