Patent ID: 6774508
Filing Date: 2004-08-10
Classification: H02J

Abstract:
An reduced-average-power electronic circuit comprising: a power source; a switch mode power supply (SMPS) powered by the power source, the SMPS having a capacity which is lower than the maximum power requirement for the hereafter-recited load; a load, powered by the SMPS, having a requirement for varying amounts of power, the power having low noise during high power conditions and the load tolerating a low voltage during low power conditions; and means for applying power from the power source to the load without passing through the SMPS when the applied power is higher than a threshold, the threshold being lower than or equal to the capacity of the SMPS,wherein the means for applying power from the power source to the load without passing through the SMPS comprises a switch in parallel with the SMPS; wherein the switch is coupled to a controller which is structured to close the switch when the applied power is higher than the threshold and to open the switch when the applied power is lower than the threshold; and wherein the controller further comprises a timer which is structured; to delay closing the switch, when the applied power is higher than the threshold, until a predetermined period of time has elapsed since the switch was last opened; or to delay opening the switch, when the applied power is lower than the threshold, until a predetermined period of time has elapsed since the switch was last closed; or both.