US3772703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Normalized decorrelation detector
Assignee: United States Department of the Air Force
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Filing: 1972-02-15
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Granted: 1973-11-13
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Expires: 1992-02-15
Abstract
Abstract A range closure detector in which new data and data from memory feeds an AND gate and triggers a monostable multivibrator which engables the same AND gate and also a feedback analog gate. The outputs of both gates are summed in a summing amplifier fed to an integrator and then fed back to the feedback analog gate. The correlation output is taken from the integrator which is also fed to the threshold circuits for use in other commands.
Inventors
- 👤 J Bogard
- 👤 G Boyles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:52
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/66; G01S13/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
A tracking system for determining correlation between incoming data signals and memory data signals, comprising: a. an exclusive OR circuit fed by the incoming data signals and the memory data signals; b. a monostable multivibrator fed by the exclusive OR gate; c. an AND gate fed by the monostable multivibrator and the exclusive OR gate; d. a feedback analog gate fed by the monostable multivibrator; e. a summing amplifier fed by the feedback analog gate and the AND gate; and f. an integrating circuit fed by the summing amplifier the output thereof being the correlation and is fed back to the feedback analog gate.
Claim 2
Dependent Claim
104 words
A tracking system for determining correlation between incoming data signals and memory data signals, comprising: a. an exclusive OR circuit fed by the incoming data signals and the memory data signals; b. a monostable multivibrator fed by the exclusive OR gate; c. an AND gate fed by the monostable multivibrator and the exclusive OR gate; d. a feedback analog gate fed by the monostable multivibrator; e. a summing amplifier fed by the feedback analog gate and the AND gate; and f. an integrating circuit fed by the summing amplifier the output thereof being the correlation and is fed back to the feedback analog gate.
Claim 3
Dependent Claim
22 words
A tracking system according to claim 1 which further comprises a clamping circuit interposed between the AND gate and the summing amplifier.
Claim 4
Dependent Claim
28 words
A tracking system according to claim 2 which further comprises a DC restoration network interposed between the summing amplifier and the integrating circuit for eliminating DC coupling therebetween.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |