multi-phase clock generation for dc-dc power regulator

[pianomania]

clock power dc

i wanna design a voltage regulator which has three phase , but how to generate a
3 phase clock source ?

solution 1 : with the original clock , then triple it , but how to multiplex it without multiplexer drop , and if the clock speed is large , then this method seems not a good idea .

solution 2 : base on the original clock , then generate the 1/3 period delay cell , but the delay cell may not just exactly equal to the 1/3 period of clock, when clock source has variation , for example , temp or process variation.. etc.

does anyone have good suggestions

 

[eem2am]

three phase clock

what frequency do yuo want.

You can spin the binary 111000111000111000....

through a SIPO shift register......the parallel outputs will be your 120 degree phase shifted oscillator signals.

or you can program a pic's pins to give the 120 degree phase shifted outputs....as long as freq is a integer multiple of the reguired individual frequencies