Electronic circuitry and methods are provided. Electrical energy is coupled to a transformer by way of line filter of a power supply. A clipper circuit limits the alternating-current voltage applied to the primary side. A voltage tripler receives output from the secondary side of the transformer and a resulting voltage is coupled to a voltage regulator. At least one regulated direct-current voltage is output to a load and is maintained while a current pulse is applied to a predetermined device. The electronic circuitry conforms to pending power conservation requirements for computers and other equipment.