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Patent US3680102A successfully refreshed from Google Patents.
US3680102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receivers for angular measurement systems, in particular to radar system receivers
Assignee: Thales SA
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Filing: 1970-02-12
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Granted: 1972-07-25
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Expires: 1990-02-12
Abstract
Abstract In a receiver of an angular measurement system of the type in which an angular indication is given by the ratio of two simultaneously received signals A and B, the useful signal is obtained through alternately phase detecting signals A + jB and A - jB with either signal A or alternately signals A - jB and A + jB, and alternately inverting the sign of the phase detection signal thus obtained. Distortions due to amplification are thus avoided.
Inventors
- 👤 Henri Poinsard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:45
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/44; G01S13/4445
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
175 words
A receiver comprising: first means having two terminals for simultaneously receiving two signals A and B whose ratio gives an indication of the angular position of a target; second means coupled to said first means, for elaborating signals A + jB and A - jB where signal jB has the same amplitude as signal B and has a phase shifted by pi /2 with respect to that of signal B, said second means having two outputs; a limiting amplifier having an input and an output; control means for alternately coupling said amplifier input to said two outputs of said second means; phase detecting means having a first input coupled to said amplifier output, a second input, and an output; means coupled to said last mentioned output, for, alternately, in synchronism with said control means, multiplying by - 1 and - 1 the signal supplied at said detecting means output; and further means for applying to said detecting means second input a signal which is a function of at least one of signals A and B.
Claim 2
Dependent Claim
175 words
A receiver comprising: first means having two terminals for simultaneously receiving two signals A and B whose ratio gives an indication of the angular position of a target; second means coupled to said first means, for elaborating signals A + jB and A - jB where signal jB has the same amplitude as signal B and has a phase shifted by pi /2 with respect to that of signal B, said second means having two outputs; a limiting amplifier having an input and an output; control means for alternately coupling said amplifier input to said two outputs of said second means; phase detecting means having a first input coupled to said amplifier output, a second input, and an output; means coupled to said last mentioned output, for, alternately, in synchronism with said control means, multiplying by - 1 and - 1 the signal supplied at said detecting means output; and further means for applying to said detecting means second input a signal which is a function of at least one of signals A and B.
Claim 3
Dependent Claim
67 words
A receiver according to claim 1, wherein said control means comprise a switch having a control input and a square wave generator having an output coupled to said switch, and said means for multiplying by + 1 and - 1 comprise second phase detecting means having a first input coupled to said firSt mentioned phase detecting means output and a second input coupled to said generator output.
Claim 4
Dependent Claim
89 words
A receiver according to claim 1, for a pulse radar system, said receiver further comprising: means for receiving from a target two signals whose ratio gives an indication of the angular position of the target; means for elaborating respectively from said received two signals two phase detected signals with respect to a reference wave; means for supplying an auxiliary sinusoidal wave, and first and second modulating means for respectively modulating said wave with said detected signals, said modulating means having respective outputs coupled to said terminals of said receiver.
Claim 5
Dependent Claim
31 words
A receiver according to claim 1, wherein said further means comprise delay means having an input coupled to said amplifier output and an output coupled to said detecting means second input.
Claim 6
Dependent Claim
21 words
A receiver according to claim 4, wherein said further means comprise pi /2 shifting means in series with said delay means.
Claim 7
Dependent Claim
37 words
A receiver according to claim 1, wherein said further means comprise a further limiting amplifier having an input coupled to said input for receiving said signal A and an output coupled to said detecting means second input.
Claim 8
Dependent Claim
22 words
A receiver according to claim 6, wherein said further means comprise pi /2 shifting means in series with said second limiting amplifier.
Claim 9
Dependent Claim
56 words
A receiver according to claim 1, wherein said further means comprise a further limiting amplifier having an input, and an output coupled to said detecting means second input, and means for alternately coupling said further limiting amplifier input to said two outputs of said second means in phase opposition with the coupling of said first amplifier.
Claim 10
Dependent Claim
22 words
A receiver according to claim 8, wherein said further means comprise pi /2 phase shifting means in series with said further amplifier.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |