US3781642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
D.c.-d.c.power supply with stabilization
Assignee: Bull HN Information Systems Italia SpA
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Filing: 1972-11-06
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Granted: 1973-12-25
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Expires: 1992-11-06
Abstract
Abstract A. d.c.-d.c. power supply in which electric current is delivered to an output terminal through an inductance. Current is delivered to the output terminal from a power source when electronic switching elements are in an ''''on'''' state and through a diode element when the electronic switching elements are in an ''''off'''' state. A feedback circuit compares the voltage at the output terminal with a reference voltage to establish the state of the electronic switching elements. Immediately after changing the state of the electronic switching elements, the feedback circuit is rendered temporarily insensitive to transient voltage spikes resulting from the change of state of the switching elements.
Inventors
- 👤 D Dutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:19
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156; H02M3/1563
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
256 words
In a power supply, energized at an input terminal by an external d.c. power source and providing regulated d.c. voltage at an output terminal, the combination comprising: controllable switch means coupled to said input terminal and said output terminal, said switch means providing a state of conduction between said terminals in response to a first control signal, said switch means providing a state of nonconduction in response to a second control signal; first signal generating means coupled to said switch means, said first signal means producing a first steady signal when said switch means is in said state of conduction, said first signal means producing a second steady signal when said switch means is in said state of non-conduction; second signal generating means coupled to said switch means for producing a first transient signal when said switch means changes from said state of non-conduction to said state of conduction, said second signal means producing a second transient signal when said switch means changes from said state of conduction to said state of non-conduction; and comparison means coupled to said first signal generating means, second signal generating means, said output terminal and said switch means, said comprison means producing said first control signal when said output terminal voltage falls below a first value determined by a combination of said second steady signal and said second transient signal, said comparison means producing said second control signal when said output terminal voltage exceeds a value determined by a combination of said first steady signal, and said first transient signal.
Claim 2
Dependent Claim
256 words
In a power supply, energized at an input terminal by an external d.c. power source and providing regulated d.c. voltage at an output terminal, the combination comprising: controllable switch means coupled to said input terminal and said output terminal, said switch means providing a state of conduction between said terminals in response to a first control signal, said switch means providing a state of nonconduction in response to a second control signal; first signal generating means coupled to said switch means, said first signal means producing a first steady signal when said switch means is in said state of conduction, said first signal means producing a second steady signal when said switch means is in said state of non-conduction; second signal generating means coupled to said switch means for producing a first transient signal when said switch means changes from said state of non-conduction to said state of conduction, said second signal means producing a second transient signal when said switch means changes from said state of conduction to said state of non-conduction; and comparison means coupled to said first signal generating means, second signal generating means, said output terminal and said switch means, said comprison means producing said first control signal when said output terminal voltage falls below a first value determined by a combination of said second steady signal and said second transient signal, said comparison means producing said second control signal when said output terminal voltage exceeds a value determined by a combination of said first steady signal, and said first transient signal.
Claim 3
Dependent Claim
67 words
The combination of claim 1, further including an inductor and a diode, said inductor coupled to said switch means and to said output terminal for providing a potential drop between said switch means and said output terminal, said diode coupled between said switch means and ground potential for providing a continuous current when said switch means changes from said state of conduction to said state of non-conduction.
Claim 4
Dependent Claim
45 words
The combination of claim 2, further including capacitor means coupled to said output terminal for storing charge when said switch means is in said state of conduction, and for delivering charge to said output terminal when said switch means is in a state of non-conduction.
Claim 5
Dependent Claim
12 words
The combination of claim 3 wherein said switch means includes transistor elements.
Claim 6
Dependent Claim
110 words
An improved switching power supply of the type having a storage capacitance, dropping impedance, switch means, and feedback circuit for changing the state of conduction to a state of non-conduction and vice versa of said switch means in response to a comparison of an output voltage of said power supply with a reference voltage. wherein the improvement comprises: circuit means coupled to said feedback circuit, said circuit means providing a transient signal to said feedback circuit after a change in the state of said switch means, said transient signal preventing said feedback circuit from causing said change in the state of conduction of said switching circuits for a predetermined interval.
Claim 7
Dependent Claim
110 words
An improved switching power supply of the type having a storage capacitance, dropping impedance, switch means, and feedback circuit for changing the state of conduction to a state of non-conduction and vice versa of said switch means in response to a comparison of an output voltage of said power supply with a reference voltage. wherein the improvement comprises: circuit means coupled to said feedback circuit, said circuit means providing a transient signal to said feedback circuit after a change in the state of said switch means, said transient signal preventing said feedback circuit from causing said change in the state of conduction of said switching circuits for a predetermined interval.
Claim 8
Dependent Claim
52 words
The improved power supply of claim 5 wherein said circuit means includes a control capacitor and a control resistor, a change of charge on said control capacitor causing said transient signal to be applied to said feedback circuit said predetermined interval established by values of said control capacitor and said control resistor.
Claim 9
Dependent Claim
158 words
In a power supply, energized at an input terminal by A d.c. power source and supplying a regulated d.c. voltage at an output terminal, the combination comprising: controllable switch means coupled to said input terminal and said output terminal, said switch means having a state of conduction and a state of non-conduction; feedback means coupled to said switch means and to said output terminal, said feedback means causing said switch means to change to said conducting state when said output terminal voltage falls below a first signal levels said feedback means causing said switch means to change to said non-conducting state when said output terminal voltage vises above a second signal level; and circuit means coupled to said feedback means, said circuit means temporarily decreasing said first signal level immediately after said switch means changes to said non-conducting state, said circuit means temporarily increasig said second signal level immediately after said switch means changes to said conducting state.
Claim 10
Dependent Claim
158 words
In a power supply, energized at an input terminal by A d.c. power source and supplying a regulated d.c. voltage at an output terminal, the combination comprising: controllable switch means coupled to said input terminal and said output terminal, said switch means having a state of conduction and a state of non-conduction; feedback means coupled to said switch means and to said output terminal, said feedback means causing said switch means to change to said conducting state when said output terminal voltage falls below a first signal levels said feedback means causing said switch means to change to said non-conducting state when said output terminal voltage vises above a second signal level; and circuit means coupled to said feedback means, said circuit means temporarily decreasing said first signal level immediately after said switch means changes to said non-conducting state, said circuit means temporarily increasig said second signal level immediately after said switch means changes to said conducting state.
Claim 11
Dependent Claim
51 words
The combination of claim 7 wherein said switch means comprises a npn power transistor, a pnp power transistor wherein a collector of said pnp power transistor is coupled to a base of said npn power transistor, and a pnp control transistor is coupled to a base of said pnp power transistor.
Claim 12
Dependent Claim
29 words
The combination of claim 8 further including an inductor coupled between said switch means and said output terminal, and a diode coupled between said inductor and a common potential.
Claim 13
Dependent Claim
17 words
The combination of claim 9 wherein said feedback means includes an amplifier with a resistor feedback circuit.
Claim 14
Dependent Claim
33 words
The combination of claim 10 wherein said circuit means includes a capacitor, wherein charge stored on the capacitor causes said decrease in said first signal level and said increase in said second signal.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |