US5072196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Costas loop carrier recovery device
Assignee: Alcatel Espace Industries SA
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Filing: 1990-08-29
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Granted: 1991-12-10
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Expires: 2010-08-29
Abstract
Abstract A Costas loop carrier recovery device with particular application to communications with spacecraft includes a voltage-controlled oscillator. Two filters having different characteristics are connected to the oscillator by a loop filter via two circuits: a direct connection, and a parallel circuit including an amplifier in series with a filter.
Inventors
- 👤 Dominique Rousselet
- 👤 Jean-Luc Foucher
- 👤 Patrick Michau
- 👤 Pascal Triaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:10
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06; H03L7/08; H03L7/085; H03L7/087
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
41 words
Costas loop carrier recovery device including a voltage-controlled oscillator and two filters having different characteristics connected to said oscillator by a loop filter via two circuits: a direct connection, and a parallel circuit including an amplifier in series with a filter.
Claim 2
Dependent Claim
41 words
Costas loop carrier recovery device including a voltage-controlled oscillator and two filters having different characteristics connected to said oscillator by a loop filter via two circuits: a direct connection, and a parallel circuit including an amplifier in series with a filter.
Claim 3
Dependent Claim
23 words
Device according to claim 1 wherein the bandwidth of one filter is at least five times wider than that of the other filter.
Claim 4
Dependent Claim
18 words
Device according to claim 1 wherein said amplifier in said parallel circuit has a voltage gain of 6.
Claim 5
Dependent Claim
25 words
Device according to claim 1 wherein said filter in said parallel circuit is adapted to render said parallel circuit operative only at very low frequencies.
Claim 6
Dependent Claim
38 words
Device according to claim 4 wherein said filter in said parallel circuit is adapted to render said parallel circuit operative only at frequencies below w n /5 where w n is the angular frequency of the forward loop.
References Cited (Backward Citations)
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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) | 1994-12-09 | 1995-06-10 | 1995-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-09 | 1999-06-10 | 1999-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-09 | 2003-06-10 | 2003-12-10 | $7700.00 | Window Closed / Lapsed |