US3665222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Short duration high current pulse generator
Assignee: TDK Micronas GmbH
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Filing: 1970-11-13
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Granted: 1972-05-23
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Expires: 1990-11-13
Abstract
Abstract A pulse modulator includes a pair of avalanche breakdown transistors connected in series, a direct current source for maintaining the avalanche transistors in their quiescent states and a triggering means for applying a pulse to the avalanche transistors to switch them simultaneously from their quiescent states to their activated states to generate a high current short duration output pulse. The modulator further includes a charge storage circuit connected to the direct current source and diodes connected between the storage circuit and the avalanche transistors and poled such that the storage circuit charges during the quiescent states of the transistors and discharges the stored charge into the avalanche transistors for increasing the power output therefrom. A plurality of pairs of avalanche transistors, storage circuits, and diodes connected in a manner similar to that of the first pair may be provided in parallel therewith for further increasing the power output of the modulator.
Inventors
- 👤 Robert K Gatwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:07
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/335; H03K17/00; H03K17/12; H03K3/53; H03K3/57
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
201 words
A pulse generator comprising: first and second avalanche breakdown transistors connected in series, each transistor having collector, emitter and base electrodes, direct current supply means applying a potential across said series connected transistors for biasing said transistors into a quiescent state, the collector of said first transistor being connected to a predetermined potential, the emitter of said second transistor being connected to a reference point, the collector of said second transistor being connected to the base and emitter of said first transistor, input means connected to the base of said second transistor for applying a triggering signal to simultaneously switch said first and second transistors from said quiescEnt state into an active state to generate an output pulse, first storage means including resistive means, a transistor and a capacitor connected in series between said predetermined potential and reference point of said direct current supply means for storing an electric charge during said quiescent state, unidirectional conduction means connected between said storage means and said series transistors for discharging the stored charge into said series transistors in response to said triggering signal for increasing said output pulse, and load means connected in series with said avalanche transistors for utilizing said output pulse.
Claim 2
Dependent Claim
201 words
A pulse generator comprising: first and second avalanche breakdown transistors connected in series, each transistor having collector, emitter and base electrodes, direct current supply means applying a potential across said series connected transistors for biasing said transistors into a quiescent state, the collector of said first transistor being connected to a predetermined potential, the emitter of said second transistor being connected to a reference point, the collector of said second transistor being connected to the base and emitter of said first transistor, input means connected to the base of said second transistor for applying a triggering signal to simultaneously switch said first and second transistors from said quiescEnt state into an active state to generate an output pulse, first storage means including resistive means, a transistor and a capacitor connected in series between said predetermined potential and reference point of said direct current supply means for storing an electric charge during said quiescent state, unidirectional conduction means connected between said storage means and said series transistors for discharging the stored charge into said series transistors in response to said triggering signal for increasing said output pulse, and load means connected in series with said avalanche transistors for utilizing said output pulse.
Claim 3
Dependent Claim
80 words
The generator in accordance with claim 1, wherein said first unidirectional conduction means is connected between said capacitor and said collector of said first avalanche transistor, said first unidirectional conduction means being poled such that it prevents discharge of said capacitor during said quiescent state of said first and second avalanche breakdown transistors and provides a discharge path for said capacitor to said first and second avalanche breakdown transistors when said first and second transistors are switched into activated states.
Claim 4
Dependent Claim
22 words
The pulse generator in accordance with claim 2, wherein the emitter electrode of said second avalanche transistor is connected to said load.
Claim 5
Dependent Claim
45 words
The pulse generator in accordance with claim 3, further including means for negatively biasing the base electrode of said second avalanche breakdown transistor for stabilizing the avalanche breakdown voltage of said avalanche transistors and for preventing false triggering of said avalanche transistors from noise transients.
Claim 6
Dependent Claim
50 words
The pulse generator in accordance with claim 4, further including a third and fourth avalanche transistors connected in series with each other and with said load means and in parallel with said first and second transistors and having quiescent and active states occurring simultaneously with said first and second transistors.
Claim 7
Dependent Claim
95 words
The pulse generator in accordance with claim 5, further including a second storage means including second resistive means, a further transistor and a second capacitor connected in series between said predetermined potential and reference point of said direct current supply means for storing an electric charge during said quiescent state of said third and fourth transistors and second unidirectional conduction means connected between said second storage means and said third and fourth transistors for discharging the stored charge into said third and fourth transistors in response to said triggering signal for increasing said input pulse.
Claim 8
Dependent Claim
75 words
The pulse generator in accordance with claim 6, wherein said second unidirectional conduction means is connected between said second capacitor and the collector of said third transistor and is poled such that it prevents discharge of said second capacitor during said quiescent state of said third and fourth transistors and provides a discharge path for said second capacitor to said third and fourth transistors when said third and fourth transistors are switched into active states.
Claim 9
Dependent Claim
99 words
The pulse generator in accordance with claim 7, wherein said third and fourth avalanche transistors include emitter, base and collector electrodes, the collector electrode of said third avalanche transistor being connected to said direct current supply means and to said second unidirectional conduction means, the emitter electrode of said third avalanche transistor being connected to the collector electrode of said fourth avalanche transistor and to the base of said third avalanche transistor, the base electrode of said fourth avalanche transistor being coupled to said input means, and the emitter electrode of said fourth transistor connected to said load means.
Claim 10
Dependent Claim
46 words
The pulse generator in accordance with claim 8, wherein said input means includes a transformer having a primary and bifilar secondary windings, said bifilar secondary windings beIng connected respectively and with the same signal polarity to the base electrodes of said second and fourth avalanche transistors.
Claim 11
Dependent Claim
22 words
The pulse generator in accordance with claim 9, wherein each of said unidirectional conduction means includes a pair of diodes in parallel.
Claim 12
Dependent Claim
56 words
The pulse generator in accordance with claim 6, including a further pair of series connected avalanche transistors connected in parallel with said third and fourth transistors and in series with said load means, and including further storage means and unidirectional discharge means connected respectively in the same manner as said second storage and unidirectional discharge means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |