US4090140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant current charging circuits for high energy modulators
Assignee: United States Department of the Army
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Filing: 1977-01-17
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Granted: 1978-05-16
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Expires: 1997-01-17
Abstract
Abstract Means for achieving square wave charging of pulse forming networks in lineype pulsers which include parallel pulse forming networks with charging inductors connected between the PFNs. The cumulative value of the distributed inductance of the charging inductors is chosen so that when combined with the total capacitance of the PFNs, the charging network pulsewidth equals the interpulse period.
Inventors
- 👤 John L. Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:20
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/52
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
136 words
In a pulse generating circuit for supplying pulses to a load and having a plurality of parallel energy storage networks including capacitance means adapted to be charged from a power source through charging inductor means and subsequently discharged through output means coupled to said load and a first storage network connected to said power source through a first charging inductor, the improvement comprising, a second energy storage network, and a second charging inductor connected in series between said second energy storage network and said first charging inductor, said charging inductors providing constant current charging for said energy storage networks and having a cumulative distributed inductance value which when combined with the total capacitance of said energy storage networks provides an output pulse to said load having a pulsewidth equal to the interpulse period between consecutive discharges.
Claim 2
Dependent Claim
136 words
In a pulse generating circuit for supplying pulses to a load and having a plurality of parallel energy storage networks including capacitance means adapted to be charged from a power source through charging inductor means and subsequently discharged through output means coupled to said load and a first storage network connected to said power source through a first charging inductor, the improvement comprising, a second energy storage network, and a second charging inductor connected in series between said second energy storage network and said first charging inductor, said charging inductors providing constant current charging for said energy storage networks and having a cumulative distributed inductance value which when combined with the total capacitance of said energy storage networks provides an output pulse to said load having a pulsewidth equal to the interpulse period between consecutive discharges.
Claim 3
Dependent Claim
26 words
The pulse generating circuit as defined by claim 1 including a plurality of charging inductors equal in number to the number of said energy storage networks.
Claim 4
Dependent Claim
30 words
The pulse generating circuit as defined by claim 2 wherein said plurality of charging inductors are connected in series and respective charging inductors are connected to respective energy storage networks.
Claim 5
Dependent Claim
19 words
The pulse generating circuit as defined by claim 3 wherein said plurality of inductors has substantially equal inductance values.
Claim 6
Dependent Claim
40 words
The pulse generating circuit as defined by claim 4 wherein said cumulative inductance value is calculated from the equation: L = T.sup.2 /4C where T is the charging period, and C is the total capacitance of said energy storage networks.
Claim 7
Dependent Claim
33 words
The pulse generating circuit as defined by claim 1 wherein said energy storage networks are comprised of pulse forming networks including a plurality of capacitors coupled in parallel by means of respective inductors.
Claim 8
Dependent Claim
38 words
The pulse generating circuit as defined by claim 1 wherein said plurality of energy storage networks each includes a group of parallely connected pulse forming networks, each includes a plurality of capacitors intercoupled in parallel by respective inductors.
Claim 9
Dependent Claim
42 words
The pulse generating circuit as defined by claim 1 wherein said charging inductors are connected in series to said power source and wherein the inductance value of the first and last inductor is greater than the inductance values of the intermediate inductors.
Claim 10
Dependent Claim
50 words
The pulse generating circuit as defined by claim 8 wherein the inductance value of said first inductor is substantially 20% greater in value than the value of said intermediate inductors, and wherein the inductance value of said last inductor is substantially 15% greater than the value of said intermediate inductors.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |