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US5111324A
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Optical receivers
Assignee: Ciena Luxembourg SARL
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Filing: 1990-06-08
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Granted: 1992-05-05
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Expires: 2010-06-08
Abstract
Abstract An optical receiver incorporating a voltage dependant impedance arranged to shunt excess AC photodetector signal away from the receiver amplifier in response to light level.
Inventors
- 👤 Fazlollah R. Jahromi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:29
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/08; H03F3/087; H04; H04B; H04B10/00; H04B10/60; H04B10/66; H04B10/69; H04B10/691; H04B10/6911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
An optical receiver having a reverse biassed photodetector, a first diode connected in series with a capacitor and a first resistor to shunt current developed by the photodetector, a second diode connected in series with a second resistor and said first diode, a source of bias current connected to said second diode and via a third resistor to said photodetector, and means for increasing for forward biassing of said first and second diodes respectively dependent in response to increasing optical signal level at said photodetector.
Claim 2
Dependent Claim
85 words
An optical receiver having a reverse biassed photodetector, a first diode connected in series with a capacitor and a first resistor to shunt current developed by the photodetector, a second diode connected in series with a second resistor and said first diode, a source of bias current connected to said second diode and via a third resistor to said photodetector, and means for increasing for forward biassing of said first and second diodes respectively dependent in response to increasing optical signal level at said photodetector.
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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) | 1995-05-05 | 1995-11-04 | 1996-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-05 | 1999-11-04 | 2000-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-05 | 2003-11-04 | 2004-05-05 | $7700.00 | Window Closed / Lapsed |