Power supply having substantially constant output during load switching

Claim 1

A power supply comprising an input source of unregulated D.C. voltage, means coupling the input source to an output including, switching means between the input source and the output, a source of regularly recurrent pulses, means responsive to said pulses for rendering the switching means operative to connect the input source to the output for a time depending on the width of each pulse, said source of regularly recurrent pulses being jointly responsive to the instantaneous voltage amplitude of the input source and the voltage amplitude at the output for adjusting the width of the pulses for regulating the output voltage, wherein the source of regularly recurrent pulses includes a sawtooth waveform generator with the slope of the waves dependent on the instantaneous voltage of the input, means for sensing the voltage at the output, means for providing an error voltage having an amplitude dependent upon variations from a predetermined voltage at the output, and means for comparing the sawtooth waves with the error voltage to produce said regularly recurrent pulses, wherein the means coupling the input source to the output comprises a plurality of driven voltage converters with their inputs connected in parallel to the switching means and their outputs connected in series voltage adding relation, a source of oscillations, and means controlled by said source of oscillations for driving said converters in synchronism.