US4868895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical device copensator
Assignee: Grass Valley Group Inc
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Filing: 1989-03-14
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Granted: 1989-09-19
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Expires: 2009-03-14
Abstract
Abstract An optical device compensator obtains from an input modulating signal an additive component and a multiplicative component. The additive and multiplicative components are combined with the input modulating signal to produce a compensated modulating signal which is applied to a driver for modulating an optical device.
Inventors
- 👤 David L. Hershberger
- 👤 Gordon E. Ransom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:00
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/50; H04B10/58
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
62 words
An optical device compensator comprising: means for deriving a first component and a second component from an input signal; and means for combining the first component with the input signal to produce an intermediate compensated signal and for combining the intermediate compensated signal with the second component to produce a compensated signal, the compensated signal being used to modulate an optical device.
Claim 2
Dependent Claim
62 words
An optical device compensator comprising: means for deriving a first component and a second component from an input signal; and means for combining the first component with the input signal to produce an intermediate compensated signal and for combining the intermediate compensated signal with the second component to produce a compensated signal, the compensated signal being used to modulate an optical device.
Claim 3
Dependent Claim
65 words
An optical device compensator as recited in claim 1where the deriving means comprises: a low pass filter to which the input signal is input; means for obtaining a first sample and a second sample from the output of the low pass filter, the first sample being the first component; and means for summing the second sample with a bias signal to produce the second component.
Claim 4
Dependent Claim
48 words
An optical device compensator as recited in claim 1 wherein the combining means comprises: means for adding the input signal and the first component to produce the intermediate compensated signal; and means for multiplying the intermediate compensated signal and the second component together to produce the compensated signal.
Claim 5
Dependent Claim
48 words
An optical device compensator as recited in claim 1 wherein the combining means comprises: means for multiplying the input signal and the second component together to produce the intermediate compensated signal; and means for adding the intermediate compensated signal and the first component to produce the compensated signal.
Claim 6
Dependent Claim
52 words
An optical device compensator as recited in claim 1 wherein the deriving means comprises: a first low pass filter from which the first component is derived; a second low pass filter from which a sample is derived; and means for summing the sample with a bias signal to produce the second component.
Claim 7
Dependent Claim
64 words
An optical device compensator as recited in claim 1 wherein the deriving means comprises: a plurality of low pass filters; means for obtaining a first sample and a second sample from each of the low pass filters; means for summing the first samples to produce the first component; and means for summing the second samples and a bias signal to produce the second component.
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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) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |