Patent ID: 7355374

Claim:
A direct current voltage converter, comprising: an inductance having a first lead and a second lead; a first capacitor having a first cap lead and a second cap lead, where the first cap lead is connected to the first lead and a first voltage potential, and the second cap lead is connected to a second voltage potential; a second capacitor having a third cap lead and a fourth cap lead, where the fourth cap lead is connected to the second voltage potential; a zener diode having a anode connected to the second lead and a cathode connected to the third cap lead; a transistor comprising having a first lead connected to the anode and a second lead connected to the second voltage potential; a voltage controlled oscillator; modulation circuit that provides a progressive sum of a random number sequence to the voltage controlled oscillator that provides an oscillator output signal; a proportional and integral controller that receives a first signal at the cathode and provides a controller output signal; and a comparator that compares the controller output signal and the oscillator output signal and provides a transistor control signal having a variable pulse duty factor to a control input of the transistor.