A power system fault handling mechanism for portable electronic devices having multiple power supplies. A safety-net circuit is triggered when a power fault condition is detected. The safety-net circuit is a diode-based bridging circuit which couples all available power supplies to the power load, yet...http://www.google.es/patents/US6202171?utm_source=gb-gplus-sharePatente US6202171 - Power fault protection in a computer system having multiple power supplies
Power fault protection in a computer system having multiple power supplies