EP0458510A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Circuit for sustaining power supply output following momentary interruption of commercial A.C. power
Assignee: Individual
•
Filing: 1991-05-14
•
Granted: —
•
Expires: 2011-05-14
Abstract
Abstract Circuitry for extending the sustain time of a computer power supply in the event of interruption of commercial A.C. power includes a capacitor bank, an associated charge path for controllably charging the capacitor bank during stable operation of the commercial A.C. power source, and discharge and disconnect paths for discharging the energy stored in the capacitor bank to sustain operation of the computer during interruption of the commercial A.C. power source and for disconnecting the capacitor from the computer power supply when the voltage across the capacitor bank has discharged below a threshold level.
Inventors
- 👤 Richard A. Martin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 22:37
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/26; G06F1/30; H; H02; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/061
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
144 words
A power supply circuit for personal computers and the like in which the output voltage of the power supply is sustained during a momentary interruption of a commercial A.C. power source, the circuit comprising: rectifier/filter means coupled to the commercial A.C. power source for providing a raw D.C. voltage source; capacitor means, a charging resistor, and a charging diode connected in series, the series combination thereof being connected to said raw D.C. voltage source to provide a charging path for said capacitor means during stable operation of the commercial A.C. power source; a break-over device and a discharge diode connected in series, the series combination thereof being connected across the series combination of said charging resistor and said charging diode to provide a path for discharging said capacitor means to sustain the raw D.C. voltage source during interruption of the commercial A.C. power source.
Claim 2
Dependent Claim
17 words
A power supply circuit as in claim 1 wherein said break-over device comprises a sidac bilateral trigger.
Claim 3
Dependent Claim
18 words
A power supply circuit as in claim 2 further comprising bleeder resistor means connected across said capacitor means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.