Patent US4695935A successfully refreshed from Google Patents.
US4695935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply
Assignee: Alcatel Lucent NV
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Filing: 1986-06-27
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Granted: 1987-09-22
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Expires: 2006-06-27
Abstract
Abstract A power supply for converting a low DC voltage, in particular a DC voltage delivered from a sea water galvanic cell (or solar cell), into a DC voltage useful for normal electronic equipment includes a number of MOS-FET transistors connected in parallel to an output transformer. The transformer has a number of primary windings distributed on a toroidal ferrite core so as to interact with the secondary winding of the transformer.
Inventors
- 👤 Sverre Oen
- 👤 Dag Poppe
- 👤 Sverre N. Tronsli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:49
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33569; Y; Y10; Y10S; Y10S136/00; Y10S136/291; Y10S136/293; Y10S323/00; Y10S323/906
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A power supply comprising: a DC/DC converter including at least two transistors connected in parallel, each having low drain-source resistance; a control circuit connected to each of said transistors to control the conductive state thereof, said transistors being controlled in parallel by a common control signal from said control circuit and exhibiting corresponding intervals of conduction, each of said transistors having output terminals; and a transformer coupler including similarly wound primary windings constituted by a plurality of windings interconnected with said output terminals.
Claim 2
Dependent Claim
83 words
A power supply comprising: a DC/DC converter including at least two transistors connected in parallel, each having low drain-source resistance; a control circuit connected to each of said transistors to control the conductive state thereof, said transistors being controlled in parallel by a common control signal from said control circuit and exhibiting corresponding intervals of conduction, each of said transistors having output terminals; and a transformer coupler including similarly wound primary windings constituted by a plurality of windings interconnected with said output terminals.
Claim 3
Dependent Claim
49 words
The power supply of claim 1 wherein said transformer coupler includes at least two transformers, each of said transformers having at least one of said primary windings and a secondary winding, said secondary winding of one transformer being connected in series with said secondary winding of the other transformner.
Claim 4
Dependent Claim
44 words
The power supply according to claim 1 wherein each of said transformers includes a toroidal core on which the primary windings are arranged in parallel, and where the primary windings are displaced from each other to interact with different parts of said secondary windings.
Claim 5
Dependent Claim
32 words
The power supply according to claim 1 further comprising either one of a sea water galvanic cell or a solar cell as source for an input DC voltage which operates said transistors.
Claim 6
Dependent Claim
38 words
The power supply according to claim 2 further comprising a rectifier and a low pass filter which is connected to the secondary winding to form the output of each of said transformers for producing an output DC voltage.
Claim 7
Dependent Claim
29 words
The power supply of claim 4 further comprising a germanium transistor oscillator driver associated with said control circuit which is arranged to be initiated by the input DC voltage.
Claim 8
Dependent Claim
52 words
The power supply according to claim 1 further comprising an outlet for said power supply, any one of a primary or secondary cell or battery for driving said control circuit, short circuit and breakdown protecting means on the outlet of the power supply, and recharging means for the secondary cell or battery.
Claim 9
Dependent Claim
35 words
The power supply of claim 1 wherein said transistors include a plurality of MOS-FET transistor circuit assemblies, each of which is associated with either one of a sea water galvanic cell or a solar cell.
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) | 1990-09-21 | 1991-03-23 | 1991-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-21 | 1995-03-23 | 1995-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-21 | 1999-03-23 | 1999-09-22 | $7700.00 | Window Closed / Lapsed |