Patent US3706994A successfully refreshed from Google Patents.
US3706994A
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Automatic confidence test for ecm repeater
Assignee: United States Department of the Air Force
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Filing: 1970-10-01
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Granted: 1972-12-19
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Expires: 1990-10-01
Abstract
Abstract An apparatus for automatically testing a repeater type ECM system by inducing a condition whereby the system gain exceeds the antenna isolation to provide a gross level system confidence test simultaneous to normal operation due to the very low duty cycle of the test.
Inventors
- 👤 Edward O Uhrig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:36
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G01S7/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
An automatic confidence test apparatus for electronic countermeasures systems comprising in combination: A gain optimization circuit utilizing the excess system gain over antenna isolation to induce oscillation, said oscillations providing pulses within said gain optimization circuit, An isolation circuit connected to said gain optimization circuit to receive said pulses, A monostable multivibrator connected to said isolation circuit to receive said pulses, said multivibrator being recharged by said pulses to provide an output signal, An And gate and driver circuit connected to said multivibrator, said And gate and driver circuit providing an output signal when said output signal from said multivibrator changes; and, A fault indicator connected to said And gate and driver circuit to provide a visual indication.
Claim 2
Dependent Claim
118 words
An automatic confidence test apparatus for electronic countermeasures systems comprising in combination: A gain optimization circuit utilizing the excess system gain over antenna isolation to induce oscillation, said oscillations providing pulses within said gain optimization circuit, An isolation circuit connected to said gain optimization circuit to receive said pulses, A monostable multivibrator connected to said isolation circuit to receive said pulses, said multivibrator being recharged by said pulses to provide an output signal, An And gate and driver circuit connected to said multivibrator, said And gate and driver circuit providing an output signal when said output signal from said multivibrator changes; and, A fault indicator connected to said And gate and driver circuit to provide a visual indication.
Claim 3
Dependent Claim
27 words
An automatic confidence test apparatus as described in claim 1 wherein said monostable multivibrator has a period greater than the oscillation period of said gain optimization circuit.
Claim 4
Dependent Claim
30 words
An automatic confidence test apparatus as described in claim 1 wherein said gain optimization circuit periodically tests the electronic countermeasures system at a low duty cycle during normal system operation.
References Cited (Backward Citations)
US2775759A
Cited
US3035229A
Cited
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 |