Patent ID: 7071582

Claim:
A power converter for providing multiple output voltages of predetermined levels, comprising: at least two magnetic amplifiers, each of which is magnetically coupled with an AC voltage induced at a winding of a transformer for amplifying the AC voltage; at least two switch circuits, each of which is coupled to a corresponding one of the magnetic amplifiers for converting an amplified AC voltage from a corresponding one of the magnetic amplifiers into a DC voltage in response to an on/off operation thereof; at least two output filters, each of which is coupled to a corresponding one of the switch circuits for providing a predetermined level of output voltage for a load; at least two switch control circuits, each of which compares an output voltage with a reference voltage and in response thereto generate a control signal to control an on/off operation of a corresponding one of the switch circuits; and a reference voltage generator coupled to each of the switch control circuit for providing each of the switch control circuit with a reference voltage, wherein the reference voltages provided by the reference voltage generator are sufficient to have the rising slopes of each output voltage of the power converter approach a unanimity with each other during a start-up period of the power converter; wherein the reference voltage generator includes a linear voltage generating circuit for generating a linear voltage with a rising slope, a diode having an anode for receiving a remote ON/OFF signal and a cathode for receiving the linear voltage with a resing slope, a first reference voltage generating block for limiting the linear voltage with a rising slope based on a predetermined voltage level and thereby generating a first reference voltage, and a second reference voltage generating block for imposing a time delay on the linear voltage with a rising slope and tuning a rising slope of the linear voltage with a rising slope, and thereby generating a second reference voltage.