US5278489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-phase switching power supply
Assignee: Kodak Versamark Inc
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Filing: 1992-05-29
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Granted: 1994-01-11
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Expires: 2012-05-29
Abstract
Abstract A switching power supply converts DC to DC voltages. The switching power supply has multiple phase time delayed voltage generating circuits and a single switching power supply regulator circuit. The multiple phase time delayed voltage generating circuits are then synchronized with a pulse period of the switching power supply regulator circuit to achieve the conversion.
Inventors
- 👤 Mark C. Bowers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:52
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156; H02M3/158; H02M3/1584
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
A switching power supply for converting DC to DC voltages comprising: a. a plurality of multiple phase time delayed voltage generating circuits; b. a switching power supply regulator circuit; c. synchronization means for synchronizing the plurality of multiple phase time delayed voltage generating circuits with a pulse period of the switching power supply regulator circuit; and d. means for altering the number of the plurality of multiple phase time delayed voltage generating circuits.
Claim 2
Dependent Claim
73 words
A switching power supply for converting DC to DC voltages comprising: a. a plurality of multiple phase time delayed voltage generating circuits; b. a switching power supply regulator circuit; c. synchronization means for synchronizing the plurality of multiple phase time delayed voltage generating circuits with a pulse period of the switching power supply regulator circuit; and d. means for altering the number of the plurality of multiple phase time delayed voltage generating circuits.
Claim 3
Dependent Claim
31 words
A switching power supply as claimed in claim 1 wherein each of the plurality of multiple phase time delayed voltage generating circuits shares an input source filter and an output filter.
Claim 4
Dependent Claim
26 words
A switching power supply as claimed in claim 1 wherein the synchronization means is uniformly distributed over a period of the switching power supply regulator circuit.
Claim 5
Dependent Claim
45 words
A switching power supply as claimed in claim 1 wherein a start time of each of the plurality of multiple phase time delayed voltage generating circuits has a time delay equivalent to a previous of the plurality of multiple phase time delayed voltage generating circuits.
Claim 6
Dependent Claim
26 words
A switching power supply as claimed in claim 1 wherein the plurality of multiple phase time delayed voltage generating circuits comprises a plurality of shift registers.
References Cited (Backward Citations)
US4384321A
Cited
US4513361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-10 | 1997-07-12 | 1998-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-10 | 2001-07-12 | 2002-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-10 | 2005-07-12 | 2006-01-11 | $7700.00 | Window Closed / Lapsed |