Hi,

Is it possible to produce a rectangular wave with a duty cycle of 10 percent using a Schmitt trigger and a constant frequency sine wave? I seem to recall the minimum duty cycle possible was 50%, but maybe that limit was for something else.

Thanks,
Ali

 

It is, but even if it were not you could make a 90% duty cycle and invert it. The duty cycle depends on the trigger levels, for a short duty cycle you get into the peaks of the wave and things get ticklish on exact values. It is also sensitive to the amplitude of the wave.

 

Square up the sine wave to get 50% dc then use a retriggerable one shot to adjust for the dc of your choice. You might even get lucky and be able to skip the squarewave part of it.

 

To check is this suit your need?