Patent US6040639A successfully refreshed from Google Patents.
US6040639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for improved load transient response in power supplies
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1995-09-29
•
Granted: 2000-03-21
•
Expires: 2015-09-29
Abstract
Abstract An apparatus contains a main electrical supply and an additional electrical supply for supplying additional electrical current in response to a change in an output load supplied by the main electrical supply. A differential measuring device senses a change in the load, or output of the main supply, and provides an indication to the additional electrical supply to supply additional current to the load. The additional electric supply contains a capacitor connected to a voltage source having a higher voltage output than the main electrical supply, and a current generator.
Inventors
- 👤 Thomas Ginell
- 👤 Lars Thorsell
- 👤 Per Lindman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:25
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/59
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
An electric power supply for a changeable load, comprising: means for supplying an electric direct current to the changeable load; additional means, operatively connected to the supplying means, for supplying additional electric direct current to the load in response to changes in the load; and means for sensing changes in an output voltage of the supplying means and for controlling the additional supplying means based on the sensed voltage changes; wherein an output voltage of the additional supplying means is larger than the output voltage of the supplying means, and the supplying means, additional supplying means, and sensing means are connected in a closed loop.
Claim 2
Dependent Claim
105 words
An electric power supply for a changeable load, comprising: means for supplying an electric direct current to the changeable load; additional means, operatively connected to the supplying means, for supplying additional electric direct current to the load in response to changes in the load; and means for sensing changes in an output voltage of the supplying means and for controlling the additional supplying means based on the sensed voltage changes; wherein an output voltage of the additional supplying means is larger than the output voltage of the supplying means, and the supplying means, additional supplying means, and sensing means are connected in a closed loop.
Claim 3
Dependent Claim
44 words
The electric power supply claimed in claim 1, wherein the additional supplying means comprises a capacitor connected to a voltage source having a higher voltage than that of the supplying means, and a current generator connected between the voltage source and the supplying means.
Claim 4
Dependent Claim
34 words
The electric power supply claimed in claim 1, wherein the sensing means comprises means for differentially measuring a change in the output voltage of the supplying means and for controlling the additional supplying means.
Claim 5
Dependent Claim
25 words
The electric power supply claimed in claim 2, wherein a positive terminal of the capacitor is connected to a positive terminal of the voltage source.
Claim 6
Dependent Claim
29 words
The electric power supply claimed in claim 3, wherein the differential measuring means includes a filter which generates an indication signal in response to fast changes in the load.
Claim 7
Dependent Claim
36 words
The electric power supply claimed in claim 5, wherein the differential measuring means includes a differential amplifier connected to the filter, and the differential amplifier controls the additional supplying means in response to the indication signal.
Claim 8
Dependent Claim
15 words
The electric power supply claimed in claim 5, wherein the filter is a low-pass filter.
Claim 9
Dependent Claim
16 words
The electric power supply claimed in claim 6, wherein the differential amplifier is an error amplifier.
Claim 10
Dependent Claim
19 words
The electric power supply claimed in claim 5, wherein the indication signal is provided to the additional supplying means.
Claim 11
Dependent Claim
23 words
The electric power supply claimed in claim 5, wherein a ripple filter is connected between the supplying means and the differential measuring means.
Claim 12
Dependent Claim
18 words
The electric power supply claimed in claim 5, wherein the indication signal is provided to the current generator.
References Cited (Backward Citations)
US3048718A
Cited
US3400325A
Cited
US4074182A
Cited
US4210958A
Cited
US4262209A
Cited
US4318007A
Cited
US4441070A
Cited
US4633412A
Cited
US4717833A
Cited
US4622629A
Cited
US4812672A
Cited
US4779037A
Cited
US4849845A
Cited
US5023746A
Cited
US5289364A
Cited
US5200692A
Cited
DE4203829A1
Cited
US5408172A
Cited
US5428524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-03-21 | 2003-09-20 | 2004-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-03-21 | 2007-09-20 | 2008-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-03-21 | 2011-09-20 | 2012-03-21 | $7700.00 | Window Closed / Lapsed |