US3613010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous wave presence detection circuit
Assignee: United States Department of the Air Force
•
Filing: 1970-01-21
•
Granted: 1971-10-12
•
Expires: 1990-01-21
Abstract
Abstract A continuous wave detection system having a crystal detector DC coupled to a threshold circuit. The output of the threshold circuit is fed directly to a coincidence circuit and also via a delay of one frequency period. The driven gated output from the coincidence circuit representing the continuous wave signal can be selected for chopping.
Inventors
- 👤 Gerald A Podolski
- 👤 Harold Balshem
- 👤 Stanley Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:46
CPC Classifications
H; H03; H03D; H03D1/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
80 words
A system for detecting the presence of continuous wave signals comprising: a. a crystal detector having an RF input; b. a DC coupled amplifier fed by a crystal detector; c. a threshold circuit fed by the amplifier; d. a delay line fed by the threshold circuit; e. a coincidence gate fed by the threshold circuit and the delay line; and f. means for detecting the output of the coincidence gate, the output representing the presence of a continuous wave signal.
Claim 2
Independent Claim
80 words
A system for detecting the presence of continuous wave signals comprising: a. a crystal detector having an RF input; b. a DC coupled amplifier fed by a crystal detector; c. a threshold circuit fed by the amplifier; d. a delay line fed by the threshold circuit; e. a coincidence gate fed by the threshold circuit and the delay line; and f. means for detecting the output of the coincidence gate, the output representing the presence of a continuous wave signal.
Claim 3
Dependent Claim
29 words
A system for detecting the presence of continuous wave signals according to claim 1 which further comprises a chopper fed by coincidence gate for producing a pulsed RF signal.
References Cited (Backward Citations)
US3094663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |