COMPROMISE VOLTAGE CONTROL FOR TRACKING MULTIPLE OUTPUT POWER SUPPLY

摘要

A feedback control system is utilized to control the output voltage levels of a power supply having multiple output voltage signals which relatively track one another. This feedback control system encloses each output voltage signal within the feedback loop and allows independent definition of the tolerance of each voltage signal. Each output voltage signal is normalized and a percent error signal is obtained for each normalized voltage signal by comparison to a common voltage reference. The percent error signals are then weighted by factors which are inversely proportional to the defined tolerances for their associated voltage signals. An error control system is then responsive to the weighted percent error signals to control the output voltage levels of the power supply. In a first embodiment, the control system includes a summing network which provides a feedback correction signal to the power supply when the sum of the weighted percent error signals does not equal zero. In a second embodiment, the control system includes a switching network which provides a feedback correction signal to the power supply when the magnitude of the most negative weighted percent error signal does not equal that of the most positive weighted percent error signal.