US3577017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectangular pulse modulator
Assignee: United States Department of the Army
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Filing: 1968-12-17
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Granted: 1971-05-04
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Expires: 1988-12-17
Abstract
Abstract Discharge of a RLC network is controlled with a siliconcontrolled rectifier to provide a rectangular pulse for pulsing GaAs lasers.
Inventors
- 👤 Jimmy R Duke
- 👤 Walter E Miller Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:24
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/57; H04; H04B; H04B10/00; H04B10/50; H04B10/501; H04B10/503; H04B10/504; H04B10/508
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
187 words
A rectangular pulse modulator comprising: a RLC network having a first, second, and third capacitor, a resistor, and an inductor; a silicon-controlled rectifier having an anode, cathode and trigger input, said cathode being connected to ground; a voltage source connected to a first side of said RLC network and to the anode of said silicon-controlled rectifier; a diode having its anode connected to a second side of said RLC network and its cathode connected to ground; a laser diode having its anode connected to ground and its cathode connected to said second side of said RLC network; and said first capacitor being connected between said first side and said second side of said RLC network, said resistor and said second capacitor being connected in series between said first and second side of said RLC network, said inductor and said third capacitor being connected in series between said first and second side of said RLC network, and said values of said first, second, and third capacitors, said resistor, and said inductor being such that the pulse produced when said RLC network is discharged is essentially a square pulse.
Claim 2
Dependent Claim
187 words
A rectangular pulse modulator comprising: a RLC network having a first, second, and third capacitor, a resistor, and an inductor; a silicon-controlled rectifier having an anode, cathode and trigger input, said cathode being connected to ground; a voltage source connected to a first side of said RLC network and to the anode of said silicon-controlled rectifier; a diode having its anode connected to a second side of said RLC network and its cathode connected to ground; a laser diode having its anode connected to ground and its cathode connected to said second side of said RLC network; and said first capacitor being connected between said first side and said second side of said RLC network, said resistor and said second capacitor being connected in series between said first and second side of said RLC network, said inductor and said third capacitor being connected in series between said first and second side of said RLC network, and said values of said first, second, and third capacitors, said resistor, and said inductor being such that the pulse produced when said RLC network is discharged is essentially a square pulse.
Claim 3
Dependent Claim
39 words
A rectangular pulse modulator as set forth in claim 1, further including a trigger input means connected to said trigger input of said silicon-controlled rectifier, said means providing a periodic pulse necessary to key said silicon-controlled rectifier into conduction.
References Cited (Backward Citations)
US3181071A
Cited
US3371232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |