US4821166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power-supply circuit
Assignee: US Philips Corp
•
Filing: 1988-03-04
•
Granted: 1989-04-11
•
Expires: 2008-03-04
Abstract
Abstract A power-supply circuit receives its power from an a.c. source (1) which, in specific time intervals is connected to a power-storage device (6) to feed power thereto. The power supply circuit includes a switch (10) which is periodically actuated by a control circuit (13) to take power from the power-storage device. Interference is suppressed in a simple, space-saving and cheap manner in that the control circuit (13) turns on the switch (10) only at times outside the time intervals (t2-t1) in which the a.c. source is connected to the power-storage device.
Inventors
- 👤 Manfred Albach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:15
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156; H02M1/00; H02M1/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
90 words
A power-supply circuit comprising: a power-storage means for storing power supplied by an a.c. voltage source, means for periodically connecting said power storage means to said a.c. voltage source during specific time intervals in order to feed power to said power storage means, switch means for taking power from the power storage means, and a control circuit for periodically actuating the switch means such that the control circuit actuates the switch means only outside said specific time intervals in which the a.c. voltage source is connected to the power-storage means.
Claim 2
Dependent Claim
90 words
A power-supply circuit comprising: a power-storage means for storing power supplied by an a.c. voltage source, means for periodically connecting said power storage means to said a.c. voltage source during specific time intervals in order to feed power to said power storage means, switch means for taking power from the power storage means, and a control circuit for periodically actuating the switch means such that the control circuit actuates the switch means only outside said specific time intervals in which the a.c. voltage source is connected to the power-storage means.
Claim 3
Dependent Claim
17 words
A power supply circuit as claimed in claim 1, wherein said connecting means comprise a rectifier stage.
Claim 4
Dependent Claim
20 words
A power supply circuit as claimed in claim 1, characterized in that the a.c. voltage source is a power-supply mains.
Claim 5
Dependent Claim
40 words
A power-supply circuit as claimed in claim 1, further comprising a detector for detecting said time intervals in which the a.c. voltage source is connected to the power-storage means and for inhibiting actuation of the switch means during said intervals.
Claim 6
Dependent Claim
31 words
A power-supply circuit as claimed in claim 4, wherein the detector is constructed as a current detector for detecting a change current from the a.c. voltage source into the power-storage means.
Claim 7
Dependent Claim
35 words
A power-supply circuit as claimed in claim 4, wherein the detector comprises a voltage detector for detecting a voltage difference of a specific polarity and/or magnitude between the a.c. voltage source and the power-storage means.
Claim 8
Dependent Claim
44 words
A power-supply circuit as claimed in claim 1, further comprising a time-gate circuit for inhibiting actuation of the switch means under control of the a.c. voltage source in time gates comprising said specific time intervals in which power is fed into the power-storage means.
Claim 9
Dependent Claim
21 words
A power-supply circuit as claimed in claim 2, characterized in that the entire rectifier stage is shunted by a capacitive arrangement.
Claim 10
Dependent Claim
46 words
A power-supply circuit as claimed in claim 2 wherein the rectifier stage is shunted by a capacitive arrangement comprising a capacitor circuit which connects those terminals of the rectifier stage which are connected to the power-storage means to a ground terminal of the a.c. voltage source.
Claim 11
Dependent Claim
49 words
A power-supply circuit as claimed in claim 2, characterized in that the rectifier stage comprises a rectifier bridge and comprises trimming capacitors individually connected in parallel with elements of the rectifier bridge and of which have a capacitance value substantially higher than the depletion-layer capacitance of its parallel element.
Claim 12
Dependent Claim
41 words
A power-supply circuit as claimed in claim 2, further comprising a detector for detecting said specific time intervals in which the a.c. voltage source is connected to the power-storage means and for inhibiting actuation of the switch means during said intervals.
Claim 13
Dependent Claim
29 words
A power-supply circuit as claimed in claim 11, wherein the detector comprises a current detector for detecting a charge current from the a.c. voltage source into the power-storage means.
Claim 14
Dependent Claim
35 words
A power-supply circuit as claimed in claim 11, wherein the detector comprises a voltage detector for detecting a voltage difference of a specific polarity and/or magnitude between the a.c. voltage source and the power-storage means.
Claim 15
Dependent Claim
44 words
A power-supply circuit as claimed in claim 2, further comprising a time-gate circuit for inhibiting actuation of the switch means under control of the a.c. voltage source in time gates comprising said specific time intervals in which power is fed into the power-storage means.
Claim 16
Dependent Claim
21 words
A power-supply circuit as claimed in claim 11 further comprising a capacitive arrangement connected in shunt with the entire rectifier stage.
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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |