US3783415A
Expired / Lapsed
US
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Transformer
Assignee: Anaconda Co
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Filing: 1972-04-19
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Granted: 1974-01-01
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Expires: 1992-04-19
Abstract
Abstract A transformer is described comprising a body of ferromagetic material and first and second conducting means that are wrapped around or pass through the ferromagnetic body. Each said conducting means comprises a plurality of insulated wires that are twisted together and doped with a high dielectric constant material in the region adjacent the ferromagnetic body. By this arrangement, an impedance transforming device is provided that has excellent broadband characteristics over several octaves in the radio frequency region and also has extremely low output impedance levels. Consequently, this device is suitable for matching the input impedance levels of transistor amplifiers.
Inventors
- 👤 S Koskinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:18
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/38
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
162 words
A broadband impedance matching device comprising: a body of ferromagnetic material; first and second means for conducting electric currents through a region adjacent said ferromagnetic body in which they are magnetically coupled, said region being close enough to said ferromagnetic body that a substantial portion of a magnetic field established by a current in the first or second conducting means interacts with said ferromagnetic body; said first conducting means having an input and an output and comprising therebetween a fIrst plurality of insulated wires that are twisted together and doped with a high dielectric constant material in the region adjacent the ferromagnetic body and are not so twisted and doped outside said region; and said second conducting means having an input and an output and comprising therebetween a second plurality of insulated wires that are twisted together and doped with a high dielectric constant material in the region adjacent the ferromagnetic body and are not so twisted and doped outside said region.
Claim 2
Dependent Claim
162 words
A broadband impedance matching device comprising: a body of ferromagnetic material; first and second means for conducting electric currents through a region adjacent said ferromagnetic body in which they are magnetically coupled, said region being close enough to said ferromagnetic body that a substantial portion of a magnetic field established by a current in the first or second conducting means interacts with said ferromagnetic body; said first conducting means having an input and an output and comprising therebetween a fIrst plurality of insulated wires that are twisted together and doped with a high dielectric constant material in the region adjacent the ferromagnetic body and are not so twisted and doped outside said region; and said second conducting means having an input and an output and comprising therebetween a second plurality of insulated wires that are twisted together and doped with a high dielectric constant material in the region adjacent the ferromagnetic body and are not so twisted and doped outside said region.
Claim 3
Dependent Claim
35 words
The apparatus of claim 1 wherein the first and second conducting means are wrapped around the ferromagnetic body to form the region where a substantial portion of the magnetic field interacts with the ferromagnetic body.
Claim 4
Dependent Claim
34 words
The apparatus of claim 1 wherein the first and second conducting means pass through the ferromagnetic body to form the region where a substantial portion of the magnetic field interacts with the ferromagnetic body.
Claim 5
Dependent Claim
158 words
The apparatus of claim 1 further comprising: third and fourth means for conducting electric currents through a region adjacent said ferromagnetic body in which they are magnetically coupled, said region being close enough to said ferromagnetic body that a substantial portion of a magnetic field established by a current in the third or fourth conducting means interacts with said ferromagnetic body; said third conducting means having an input and an output and comprising therebetween a third plurality of insulated wires that are twisted together and doped with a high dielectric constant material in the region adjacent the ferromagnetic body and are not so twisted and doped outside said region; and said fourth conducting means having an input and an output and comprising therebetween a fourth plurality of insulated wires that are twisted together and doped with a high dielectric constant material in the region adjacent the ferromagnetic body and are not so twisted and doped outside said region.
Claim 6
Dependent Claim
95 words
The apparatus of claim 4 wherein: the first and second conducting means are twisted together and are wrapped around the ferromagnetic body to form the region where a substantial portion of the magnetic field established by a current in the first or second conducting means interacts with the ferromagnetic body; and the third and fourth conducting means are twisted together and are wrapped around the ferromagnetic body to form the region where a substantial portion of the magnetic field established by a current in the third or fourth conducting means interacts with the ferromagnetic body.
Claim 7
Dependent Claim
93 words
The apparatus of claim 4 wherein: the first and second conducting means are twisted together and pass through the ferromagnetic body to form the region where a substantial portion of the magnetic field established by a current in the first or second conducting means interacts with the ferromagnetic body; and the third and fourth conducting means are twisted together and pass through the ferromagnetic body to form the region where a substantial portion of the magnetic field established by a current in the third or fourth conducting means interacts with the ferromagnetic body.
Claim 8
Dependent Claim
49 words
The apparatus of claim 6 wherein: the first, second, third, and fourth conducting means are pairs of No. 32 wires; in the regions where they are twisted, the wires in each pair are twisted together about six times per inch; and the high dielectric constant material is silicon jelly.
Claim 9
Dependent Claim
52 words
The broadband impedance matching device of claim 1 wherein the input of at least one of the first and second conducting means is not located adjacent the ferromagnetic body and the insulated wires in said conducting means are not twisted and doped between said input and the region adjacent the ferromagnetic body.
Claim 10
Dependent Claim
52 words
The broadband impedance matching device of claim 1 wherein the output of at least one of the first and second conducting means is not located adjacent the ferromagnetic body and the insulated wires in said condUcting means are not twisted and doped between said output and the region adjacent the ferromagnetic body.
Claim 11
Dependent Claim
52 words
The broadband impedance matching device of claim 4 wherein the input of at least one of the third and fourth conducting means is not located adjacent the ferromagnetic body and the insulated wires in said conducting means are not twisted and doped between said input and the region adjacent the ferromagnetic body.
Claim 12
Dependent Claim
52 words
The broadband impedance matching device of claim 4 wherein the output of at least one of the third and fourth conducting means is not located adjacent the ferromagnetic body and the insulated wires in said conducting means are not twisted and doped between said output and the region adjacent the ferromagnetic body.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |