Best Circuit Design for 80MHz Duty Cycle Extender and Phase Shifter at 5V Supply

For the Duty Cycle extender

I use a CR circuit with a shotkey diode around the R to charge the Capacitor quickly and the circuit discharges slowly through the R hence increasing the duty cycle. This network is between two High speed comparators to produce an interface to a square wave.

For the phase shift

I am picking of the signal from a series of high speed logic gates, the high speed logic gates generate the transition delay of the signal

All this runs off 5V

Does anyone have a better solution

Hi Patrick,

I am not so sure about what you mean about that better design and application.

I suggest you use a variable capacitor in your circuit and find out what is best for your design.

Good Luck.

Best,
Neil

For the duty cycle extender, take the signal and a delayed version of the signal an run them into an OR gate. Your delay technique is fine.

Thanks for your suggestion I will try the OR gate, it will bring the phase back in.

What I was looking for is for confirmation of my solution, and if it wasn't such a good idea perhaps some advice as to a better design.