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A method and an apparatus which delay initiation of a shut down procedure in a computer to allow the riding through of variations in a power supply. An interrupter receives and interrupts an asserted shut down signal and outputs an interrupt signal when the shut down signal has been asserted. A gate

A method and an apparatus which delay initiation of a shut down procedure in a computer to allow the riding through of variations in a power supply. An interrupter receives and interrupts an asserted shut down signal and outputs an interrupt signal when the shut down signal has been asserted. A gate trigger is coupled to the interrupter and triggers an energy booster to raise the power supplied to the computer when the gate trigger receives the interrupt signal from the interrupter. The amount of energy remaining in the energy booster is monitored by a monitor and a depletion signal is outputted when the amount of energy remaining in the energy booster is below a reference value. An output stage has inputs coupled to the interrupter and the monitor, and receives at these inputs the interrupt signal and the depletion signal and outputs a re-asserted shut down signal to the computer when both the interrupt signal and the depletion signal are present at the inputs of the output stage.

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A device for riding through variations in a power supply and delaying initiation of a shut down procedure in a computer, the device comprising an energy booster for raising the power supplied to the computer; an interrupter for receiving and interrupting an asserted shut down signal and outputting a

A device for riding through variations in a power supply and delaying initiation of a shut down procedure in a computer, the device comprising an energy booster for raising the power supplied to the computer; an interrupter for receiving and interrupting an asserted shut down signal and outputting an interrupt signal when said shut down signal has been asserted; a gate trigger coupled to said interrupter and said energy booster for triggering said energy booster to raise the power supplied to the computer when said gate trigger receives said interrupt signal from said interrupter; means for monitoring an amount of energy remaining in said energy booster coupled to said energy booster, said means for monitoring outputting a depletion signal when the amount of energy in said energy booster is below a reference value; and an output stage having inputs coupled to said interrupter and said means for monitoring, said output stage receiving at said inputs said interrupt signal and said depletion signal and outputting a re-asserted shut down signal to said computer when both said interrupt signal and said depletion signal are present at the inputs of said output stage.