Oscillator averaging phase shift generator

Master and slave oscillators connected in synchronization, comprising:

• a master oscillator having a sawtooth wave output and operating at a first frequency;
• a slave oscillator having an input and operating at a frequency slower than said first frequency;
• a synchronization circuit connected between said sawtooth output of said master oscillator and said input of said slave oscillator, said synchronization circuit including:
• a comparator having a first input connected to said sawtooth wave output of said master oscillator;
• a filter having an input connected to said sawtooth wave output of said master oscillator;
• a second input of said comparator connected to an output of said filter;
• an output of said comparator connected to said input of said slave oscillator.

A dual output DC to DC voltage converter, comprising:

• a first pulse width modulator circuit having a voltage input and including a first oscillator connected to generate a first voltage output, said oscillator including a sawtooth wave signal output;
• a filter connected to said sawtooth wave output of said first oscillator;
• a comparator having first and second inputs, said first input of said comparator being connected to said sawtooth wave output of said first oscillator and said second input of said oscillator being connected to an output of said filter;
• and
• a second pulse width modulation circuit having an input connected to receive said input voltage and having an output to produce a second output voltage, said second pulse width modulation circuit including a second oscillator, said second oscillator including a control input, said control input of said second oscillator being connected to receive an output signal from said comparator.

A method for synchronizing and phase shifting first and second oscillators, comprising the steps of:

• averaging an output of the first oscillator to produce an averaged signal;
• comparing the output of the first oscillator to the averaged signal;
• and
• triggering the second oscillator when the output of the first oscillator approximately equals the averaged signal.

A method of synchronizing and phase shifting first and second voltage converters, comprising the steps of:

• averaging an oscillator output of the first voltage converter to produce an averaged signal;
• comparing the oscillator output of the first voltage converter to the averaged signal;
• and
• triggering the second voltage converter when the oscillator output of the first voltage converter approximately equals the averaged signal.