Patent US4051473A successfully refreshed from Google Patents.
US4051473A
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Input tracking threshold detector
Assignee: Boeing North American Inc
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Filing: 1976-09-27
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Granted: 1977-09-27
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Expires: 1996-09-27
Abstract
Abstract An input tracking threshold detector includes a first circuit receiving input signal, a feedback signal, and a predetermined gating signal. The first circuit outputs a binary signal which during gating signal enablement intervals is indicative of the relative amplitudes of the input and feedback signals. The feedback signal is developed from the first circuit output by a second circuit whose output signal amplitude is indicative of the duty cycle of its input.
Inventors
- 👤 Marvin L. Hooker, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:24
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/292; G01S7/2923; G01S7/2927; G01S7/34
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
121 words
In a radar system including receiver means, and detector means for providing a video signal S i from the receiver means output, the improvement comprising, in combination, first means for generating a gating signal S g having enablement intervals occurring in a predetermined time relation to the transmitted signal, second means for receiving S i , S g , and a feedback signal S f , and outputting a signal S n which, during the S g enablement intervals, is a binary signal indicative of the relative amplitudes of S i and S f , and third means for receiving S n and outputting the signal S f , S f being indicative of the duty cycle of S n .
Claim 2
Dependent Claim
121 words
In a radar system including receiver means, and detector means for providing a video signal S i from the receiver means output, the improvement comprising, in combination, first means for generating a gating signal S g having enablement intervals occurring in a predetermined time relation to the transmitted signal, second means for receiving S i , S g , and a feedback signal S f , and outputting a signal S n which, during the S g enablement intervals, is a binary signal indicative of the relative amplitudes of S i and S f , and third means for receiving S n and outputting the signal S f , S f being indicative of the duty cycle of S n .
Claim 3
Dependent Claim
35 words
The radar system as defined in claim 1 wherein said first means comprises means for producing the S g enablement intervals at times during which it is expected that S i will contain only noise.
Claim 4
Dependent Claim
30 words
The radar system as defined in claim 2 wherein said second means includes filter means connected for preventing contribution to S n by predetermined frequency components of S i .
Claim 5
Dependent Claim
20 words
The radar system as defined in claim 2 wherein said second means includes signal amplitude comparison means and gating means.
Claim 6
Dependent Claim
15 words
The radar system as defined in claim 2 wherein said third means comprises integrating means.
Claim 7
Dependent Claim
22 words
The radar system as defined in claim 4 wherein said signal amplitude comparison means comprises means for providing a binary signal output.
Claim 8
Dependent Claim
33 words
The radar system as defined in claim 6 wherein said signal amplitude comparison means includes digital filter means connected for preventing contribution to S n by predetermined frequency components of S i .
Claim 9
Dependent Claim
17 words
The radar system as defined in claim 7 wherein said filter means comprises low pass filter means.
Claim 10
Dependent Claim
96 words
An input signal tracking threshold detector comprising: a. first circuit means for receiving (i) the input signal, S i , (ii) a feedback signal, S f , and (iii) a predetermined gating signal, S g , and outputting a signal S n which, during enablement intervals as controlled by S g , is a binary signal indicative of the relative amplitudes of S i and S f , and b. second circuit means for receiving S n and outputting the signal S f , S f being indicative of the duty cycle of S n .
Claim 11
Dependent Claim
96 words
An input signal tracking threshold detector comprising: a. first circuit means for receiving (i) the input signal, S i , (ii) a feedback signal, S f , and (iii) a predetermined gating signal, S g , and outputting a signal S n which, during enablement intervals as controlled by S g , is a binary signal indicative of the relative amplitudes of S i and S f , and b. second circuit means for receiving S n and outputting the signal S f , S f being indicative of the duty cycle of S n .
Claim 12
Dependent Claim
30 words
The detector as defined in claim 9 wherein said first circuit means includes filter means connected for preventing contribution to S n by predetermined frequency components of S i .
Claim 13
Dependent Claim
34 words
The detector as defined in claim 9 wherein said first circuit means includes signal amplitude comparison means connected for receiving S i and S f and gating means connected for receiving S g .
Claim 14
Dependent Claim
15 words
The detector as defined in claim 11 wherein said second circuit means comprises integrating means.
Claim 15
Dependent Claim
21 words
The detector as defined in claim 11 wherein said signal amplitude comparison means comprises means for providing a binary signal output.
Claim 16
Dependent Claim
32 words
The detector as defined in claim 13 wherein said signal amplitude comparison means includes digital filter means connected for preventing contribution to S n by predetermined frequency components of S i .
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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |