US3659189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulated power supply lead-drop compensation
Assignee: Forbro Design Corp
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Filing: 1971-02-03
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Granted: 1972-04-25
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Expires: 1991-02-03
Abstract
Abstract An operational power supply is connected to supply the voltage drop in the common lead from the main regulated power supply to the load. Regulated power supplies are designed to regulate their terminal voltage to a high degree. Where a remote load is being supplied, the voltage drop in the connecting leads may cause trouble as, for example, degraded voltage regulation across the actual load. This problem has been solved in some cases by providing remote voltage sensing leads feeding back the actual load voltage over leads separate from the load current carrying leads. However, there are practical limits imposed on this remote sensing method. The voltage drop in the common lead to the load must be substantially less than the pass transistor drive amplifier output since the voltage drop in the common lead is in series and in opposition to this output. Also, if current limiting is accomplished by using the voltage drop across a current sensing resistor in series with the common lead and the reference voltage for the current limiting circuit is derived from the voltage reference, the voltage drop in the common lead acts in series with the voltage across the current sensing resistor causing current limiting to take place at a lower actual load current than provided for.
Inventors
- 👤 John Kiviranna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:15
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/565
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
185 words
In a regulated power supply system, the combination of; a regulated power supply including a pair of output terminals, a feedback terminal and a common terminal; a two terminal load to be supplied with power from said output terminals; a first circuit means connected from the first of said output terminals to the first of said load terminals; an operational power supply including an inverting input terminal, a common terminal and an output terminal; a connection between the second of said power supply output terminals and said operational power supply common terminal; a second circuit means connected from said output terminal of said operational power supply to the second of said load terminals; a lead connected between the said second load terminal, the inverting input terminal of said operational power supply and the regulated power supply common terminal; and a feedback circuit connected from said first load terminal to said feedback terminal; whereby said second power supply output terminal and said second load terminal are maintained at substantially the same potential in the presence of a load current voltage drop in said second circuit means.
Claim 2
Dependent Claim
185 words
In a regulated power supply system, the combination of; a regulated power supply including a pair of output terminals, a feedback terminal and a common terminal; a two terminal load to be supplied with power from said output terminals; a first circuit means connected from the first of said output terminals to the first of said load terminals; an operational power supply including an inverting input terminal, a common terminal and an output terminal; a connection between the second of said power supply output terminals and said operational power supply common terminal; a second circuit means connected from said output terminal of said operational power supply to the second of said load terminals; a lead connected between the said second load terminal, the inverting input terminal of said operational power supply and the regulated power supply common terminal; and a feedback circuit connected from said first load terminal to said feedback terminal; whereby said second power supply output terminal and said second load terminal are maintained at substantially the same potential in the presence of a load current voltage drop in said second circuit means.
Claim 3
Dependent Claim
40 words
A regulated power supply system as set forth in claim 1; wherein said first circuit means includes an operational power supply connected to maintain said first output terminal at substantially the same potential as the first of said load terminals.
Claim 4
Dependent Claim
22 words
A regulated power supply system as set forth in claim 1; wherein said feedback circuit comprises an adjustable output voltage control resistor.
Claim 5
Dependent Claim
27 words
A regulated power supply system as set forth in claim 1; wherein said first and second circuit means comprise electrical conductors of substantial length and resistive impedance.
Claim 6
Dependent Claim
24 words
A regulated power supply system as set forth in claim 1; wherein said load is remotely located with respect to said regulated power supply.
Claim 7
Dependent Claim
23 words
A regulated power supply system as set forth in claim 1; and including current limiting circuit means connected to said regulated power supply.
Claim 8
Dependent Claim
37 words
A regulated power supply system as set forth in claim 1; wherein said load is remotely located with respect to said regulated power supply and said operational power supply is located adjacent to said regulated power supply.
Claim 9
Dependent Claim
196 words
In a regulated power supply system, the combination of: a regulated power supply including a pair of output terminals, a feedback terminal and a common terminal; a two terminal load to be supplied with power from said output terminals; a first circuit means connected from the first of said output terminals to the first of said load terminals; an operatIonal power supply including an inverting input terminal, a common terminal and an output terminal; a second circuit means connected between the second of said power supply output terminals and said operational power supply output terminal; a connection from said common terminal of said operational power supply to the second of said load terminals; a lead connected between the second load terminal and the regulated power supply common terminal; a connection between said second output terminal of said power supply and said inverting input terminal of said operational power supply; and a feedback circuit connected from said first load terminal to said feedback terminal; whereby said second power supply output terminal and said second load terminal are maintained at substantially the same potential in the presence of a load current voltage drop in said second circuit means.
Claim 10
Dependent Claim
196 words
In a regulated power supply system, the combination of: a regulated power supply including a pair of output terminals, a feedback terminal and a common terminal; a two terminal load to be supplied with power from said output terminals; a first circuit means connected from the first of said output terminals to the first of said load terminals; an operatIonal power supply including an inverting input terminal, a common terminal and an output terminal; a second circuit means connected between the second of said power supply output terminals and said operational power supply output terminal; a connection from said common terminal of said operational power supply to the second of said load terminals; a lead connected between the second load terminal and the regulated power supply common terminal; a connection between said second output terminal of said power supply and said inverting input terminal of said operational power supply; and a feedback circuit connected from said first load terminal to said feedback terminal; whereby said second power supply output terminal and said second load terminal are maintained at substantially the same potential in the presence of a load current voltage drop in said second circuit means.
References Cited (Backward Citations)
US3138752A
Cited
US3577064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |