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US4628433A
Expired / Lapsed
US
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Control circuit for diode-or connected power supplies
Assignee: AG Communication Systems Corp
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Filing: 1985-12-30
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Granted: 1986-12-09
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Expires: 2005-12-30
Abstract
Abstract A control circuit which monitors the output voltage of multiple power supplies connected to each other in a diode-or arrangement. When one power supply provides a higher voltage than the others the control circuit causes the lower output power supplies to operate in a standby mode. The control circuit includes voltage dividers on both sides of the output diode of the power supplies. These voltage dividers provide indications of the voltage output of their associated power supply and the other power supplies. A voltage comparator monitors the output voltage of its associated power supply and the other diode-or connected power supplies as indicated by the voltage dividers. The voltage comparator to adjust the voltage output of the associated power supply to a level just below the high output power supply, thereby leaving it in a standby mode of operation. If the high output power supply provides a reduced level of output voltage the voltage comparator in the standby power supply causes that power supply to then supply power to the load without any interruption in supply of the power.
Inventors
- 👤 Hubertus S. Notohamiprodjo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:43
CPC Classifications
H; H02; H02J; H02J1/00; H02J1/10; H02J1/102; H02J1/108
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
192 words
A control circuit for a power supply diode-or connected in a power supply system including a plurality of power supplies each power switching circuit being connected to a load via an output diode, said control circuit comprising: first voltage indicating means connected between said load and said output diode and effective to provide a first signal representative of the voltage applied to said load; second voltage indicating means connected between said power switching circuit and said output diode and effective to provide a second signal representation of the output voltage of said power switching circuit; and switching means connected between said first and second voltage indicating means and operated in response to said first signal having a magnitude larger than said second signal to electrically connect said first voltage indicating means to said second voltage indicating means; said comparator being operated in response to said first signal having a magnitude larger than predetermined value to provide a control signal representative of the difference between said first signal and said predetermined value; said power switching circuit being operated in response to said control signal to increase its output voltage by a proportionate amount.
Claim 2
Dependent Claim
192 words
A control circuit for a power supply diode-or connected in a power supply system including a plurality of power supplies each power switching circuit being connected to a load via an output diode, said control circuit comprising: first voltage indicating means connected between said load and said output diode and effective to provide a first signal representative of the voltage applied to said load; second voltage indicating means connected between said power switching circuit and said output diode and effective to provide a second signal representation of the output voltage of said power switching circuit; and switching means connected between said first and second voltage indicating means and operated in response to said first signal having a magnitude larger than said second signal to electrically connect said first voltage indicating means to said second voltage indicating means; said comparator being operated in response to said first signal having a magnitude larger than predetermined value to provide a control signal representative of the difference between said first signal and said predetermined value; said power switching circuit being operated in response to said control signal to increase its output voltage by a proportionate amount.
Claim 3
Dependent Claim
44 words
A control circuit as claimed in claim 1, wherein said first voltage divider is effective to provide said first signal of a magnitude equal to said predetermined value when said voltage applied to said load is applied only by the associated power switching circuit.
Claim 4
Dependent Claim
19 words
A control circuit as claimed in claim 1, wherein said first voltage indicating means comprises a first voltage divider.
Claim 5
Dependent Claim
19 words
A control circuit as claimed in claim 1, wherein said second voltage indicating means comprises a second voltage divider.
Claim 6
Dependent Claim
15 words
A control circuit as claimed in claim 1, wherein said switching means comprises a diode.
Claim 7
Dependent Claim
16 words
A control circuit as claimed in claim 1, wherein said switching means comprises a Schottky diode.
Claim 8
Dependent Claim
35 words
A control circuit as claimed in claim 3, wherein said first voltage divider comprises first and second series connected resistors effective to provide said first signal at the junction of said first and second resistors.
Claim 9
Dependent Claim
35 words
A control circuit as claimed in claim 4, wherein said second voltage divider comprises third and fourth series connected resistors effective to provide said second signal at the junction of said third and fourth resistors.
Claim 10
Dependent Claim
35 words
A control circuit as claimed in claim 7, wherein said second voltage divider comprises third and fourth series connected resistors effective to provide said second signal at the junction of said third and fourth resistors.
Claim 11
Dependent Claim
34 words
A control circuit as claimed in claim 9, wherein said switching means comprises a diode connected between the junction of said first and second resistors and the junction of said third and fourth resistors.
Claim 12
Dependent Claim
35 words
A control circuit as claimed in claim 9, wherein said switching means comprises a Schottky diode connected between the junction of said first and second resistors and the junction of said third and fourth resistors.
References Cited (Backward Citations)
US3824450A
Cited
US4194147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |