High voltage DC power supply

Claim 1

A DC power supply having a high voltage output comprising: loop control amplifier means for developing a pulse width controlled signal in response to a magnitude difference between a command voltage and a feedback voltage derived from said high voltage output; driver means for controlling current through a primary coil of a step-up transformer, said driver means responsive to said pulse width controlled signal; multiplier means for rectifying and increasing voltage present at a secondary coil of said step-up transformer; voltage divider means coupled to said multiplier means for sensing the voltage produced by said multiplier means and for providing said feedback voltage; current limiting resistor means in series with said high voltage output for protecting components of said power supply from damage in the event of a short circuit of said high voltage output; current sensing resistor means in series with said high voltage output for developing a voltage representing current magnitude flowing through said high voltage output, said current sensing resistor means coupled to said voltage divider means so that said voltage representing current magnitude modifies said feedback voltage to compensate for a voltage drop across said current limiting resistor means so as to maintain voltage regulation of said high voltage output; current measuring means responsive to said voltage representing current magnitude for providing a signal representing current magnitude for providing a signal representing current magnitude flowing through said high voltage output; and voltage measuring means responsive to said feedback voltage for providing a signal representing a voltage magnitude present at said high voltage output.