US3638103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching regulator
Assignee: National Aeronautics and Space Administration
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Filing: 1970-11-03
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Granted: 1972-01-25
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Expires: 1990-11-03
Abstract
Abstract A switch connected between an unregulated DC power source and a load is controlled by a variable conductance device which compares the load voltage to a reference voltage. If the load voltage tends to increase above a predetermined value the variable conductance device tends to reduce the conduction of the switch. A hysteresis network provides feedback to the variable conductance device to produce a cumulative action so that the switch will turn off rapidly when the variable conductance device tends to reduce the conduction of the switch, and similarly, will turn on rapidly when the variable conductance device increases the conduction of the switch.
Inventors
- 👤 Arthur G Birchenough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:59
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: 12
Claim 1
Independent Claim
191 words
A switching voltage regulator adapted to be connected between one side of a DC source and one side of a load, the other side of the DC source and load being grounded, said regulator comprising, in combination, a first switch having first and second power electrodes and a control electrode; means for connecting said first power electrode of said switch to one side of the DC source; filter circuit means connected between said second power electrode of said switch and said one side of the load; variable conducting means having first and second signal output electrodes and a signal input electrode, said first signal output electrode being connected to said one side of the load and said second Signal output electrode being connected to said control electrode of said switch to control the conduction of said switch; a constant voltage DC source; means for connecting said constant voltage source to said signal input electrode of said variable conducting means; and means responsive to said first switch for turning said variable conducting means fully off when conduction of said first switch decreases and fully on when conduction of said first switch increases.
Claim 2
Dependent Claim
191 words
A switching voltage regulator adapted to be connected between one side of a DC source and one side of a load, the other side of the DC source and load being grounded, said regulator comprising, in combination, a first switch having first and second power electrodes and a control electrode; means for connecting said first power electrode of said switch to one side of the DC source; filter circuit means connected between said second power electrode of said switch and said one side of the load; variable conducting means having first and second signal output electrodes and a signal input electrode, said first signal output electrode being connected to said one side of the load and said second Signal output electrode being connected to said control electrode of said switch to control the conduction of said switch; a constant voltage DC source; means for connecting said constant voltage source to said signal input electrode of said variable conducting means; and means responsive to said first switch for turning said variable conducting means fully off when conduction of said first switch decreases and fully on when conduction of said first switch increases.
Claim 3
Dependent Claim
11 words
The circuit of claim 1 wherein said switch is a transistor.
Claim 4
Dependent Claim
26 words
The circuit of claim 2 and further including a resistor connected between said one side of said DC source and said control electrode of said switch.
Claim 5
Dependent Claim
35 words
The circuit of claim 1 wherein said variable conducting means is a transistor and wherein said means for connecting said second signal electrode to said control electrode of said switch is a voltage dropping element.
Claim 6
Dependent Claim
13 words
The circuit of claim 4 wherein said voltage dropping element is a resistor.
Claim 7
Dependent Claim
15 words
The circuit of claim 4 wherein said voltage dropping element is a constant current diode.
Claim 8
Dependent Claim
36 words
The circuit of claim 4 wherein said constant voltage source is a zener diode and further including a resistor connected between said one side of said DC source and said zener diode to provide current thereto.
Claim 9
Dependent Claim
57 words
The circuit of claim 7 wherein said responsive means comprises a second voltage dropping element connected between said second power electrode of said switch and the base electrode of said transistor and wherein said means for connecting said constant voltage source to said signal input electrode of said variable conducting means is a third voltage dropping element.
Claim 10
Dependent Claim
15 words
The circuit of claim 8 wherein said second and third voltage dropping elements are resistors.
Claim 11
Dependent Claim
22 words
The circuit of claim 9 and further including a capacitor connected in parallel with said resistor comprising said second voltage dropping means.
Claim 12
Dependent Claim
53 words
The circuit of claim 10 wherein said filter means includes an inductive reactor in series with the load current path and further including in said circuit a diode connected between said second power electrode of said switch and ground to provide a path for the inductive reactor current when said switch is open.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |