US3662289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency modulation by light impingement on a solid state oscillator
Assignee: RCA Corp
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Filing: 1970-07-30
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Granted: 1972-05-09
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Expires: 1990-07-30
Abstract
Abstract Frequency modulation by varying the intensity of light impinging on a three terminal GaAs microwave oscillator.
Inventors
- 👤 Joseph F Dienst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:52
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/36; H03C7/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
39 words
wherein the frequency of said oscillator is changed from said predetermined frequency by the application of the varying intensity of said light radiation signal to the bottom of said kerf, to thereby frequency modulate the oscillations of said oscillator.
Claim 2
Dependent Claim
12 words
The apparatus defined in claim 1, wherein said solid material is GaAs.
Claim 3
Dependent Claim
62 words
The apparatus defined in claim 2, wherein the frequency of said oscillator is a linear function of the light intensity applied to said kerf over a predetermined range of light intensities and is a non-linear function of this light intensity outside of said predetermined range, and wherein the intensity of said light radiation signal is within said predetermined range at all times.
Claim 4
Dependent Claim
15 words
The apparatus defined in claim 2, wherein said modulated light source is a modulated laser.
Claim 5
Dependent Claim
83 words
The apparatus defined in claim 2, wherein said block of GaAs is composed of separate P and N regions with a PN junction therebetween in which there is located a space charge, said kerf being located solely in the N region and extending in a direction substantially perpendicular to said PN junction from said first face to a point sufficiently close to said PN junction for incident light on the bottom of said junction to interact with the space charge within said junction.
Claim 6
Dependent Claim
25 words
The apparatus defined in claim 2, wherein said third electrode is composed of a material which exhibits a Schottky barrier region at said second face.
Claim 7
Dependent Claim
14 words
The apparatus defined in claim 6, wherein said third electrode is composed of nickel.
References Cited (Backward Citations)
US2794863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |