Patent US3660647A successfully refreshed from Google Patents.
US3660647A
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Automatic signal delay tracking system
Assignee: United States Department of the Navy
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Filing: 1969-12-24
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Granted: 1972-05-02
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Expires: 1989-12-24
Abstract
Abstract A system for varying the relative time delay between two broadband input signals consisting of an adjustable time delay coupled to one of two input channels of a two point clipper correlator. The correlator includes a plurality of cross-coupled exclusive OR gates which generate output signals only when the correlation functions of both channels correspond. Decisions made in the correlator at each sample time are used to vary the adjustable delay, to provide automatic tracking of the peak of the cross-correlation function between the input signals.
Inventors
- 👤 Cabell N Pryor Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:54
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/66; G06; G06G; G06G7/00; G06G7/12; G06G7/19; G06G7/1921; G06G7/1928; G06G7/1935
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
126 words
An automatic signal delay tracking system comprising: first and second means for sampling and clipping first and second input signals respectively; adjustable delay means connected to said first sampling and clipping means for delaying samples of said first input signal a selectable interval; means connected to said second sampling and clipping means for comparing said first and second input signals for coherence and producing at least two output signals; logic network means connected to said comparing means for determining a relationship between said output signals, said logic network means connected to and automatically controlling said adjustable delay means in response to said output signals; and means connected to said logic network means for scanning through a range of adjustable delay values to search for possible targets.
Claim 2
Dependent Claim
126 words
An automatic signal delay tracking system comprising: first and second means for sampling and clipping first and second input signals respectively; adjustable delay means connected to said first sampling and clipping means for delaying samples of said first input signal a selectable interval; means connected to said second sampling and clipping means for comparing said first and second input signals for coherence and producing at least two output signals; logic network means connected to said comparing means for determining a relationship between said output signals, said logic network means connected to and automatically controlling said adjustable delay means in response to said output signals; and means connected to said logic network means for scanning through a range of adjustable delay values to search for possible targets.
Claim 3
Dependent Claim
42 words
An automatic signal delay tracking system as in claim 1 wherein: said comparing means includes first and second delay means for delaying all inputs a fixed interval; and a plurality of EX OR gates interconnected with said first and second delay means.
Claim 4
Dependent Claim
65 words
An automatic signal delay tracking system as in claim 2 wherein: said plurality of EX OR gates includes a first EX OR gate connected to the input of said first delay means, and to the output of said second delay means; and a second EX OR gate connected to the input of said second delay means and to the output of said first delay means.
Claim 5
Dependent Claim
35 words
An automatic signal delay tracking system as in claim 2 wherein: said plurality of EX OR gates includes a third exclusive OR gate connected to the inputs of both said first and second delay means.
Claim 6
Dependent Claim
22 words
An automatic signal delay tracking system as in claim 1 wherein said adjustable delay means includes interconnected coarse and fine delay means.
Claim 7
Dependent Claim
25 words
An automatic signal delay tracking system as in claim 5 wherein said coarse delay means is coNnected to and controlled by a reversible binary counter.
Claim 8
Dependent Claim
53 words
An automatic signal delay tracking system as in claim 5 wherein said fine delay means includes fixed frequency strobing means, strobe delay means connected to said fixed frequency strobing means for selectively delaying the output thereof; and reversible binary counting means connected to said strobe delay means for controlling the delay produced thereby.
Claim 9
Dependent Claim
26 words
An automatic signal delay tracking system as in claim 5 further comprising: rate counting means connected to said logic network means for regulating the output thereof.
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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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |