does anyone have experience with using the tektronix oscilloscoop in multisim to measure duty cycle?? in my case i want to measure the duty cycle of the output of an schmitt trigger. the circuit is above

 

Duty Cycle, in %, = [ Th / ( Tl + Th ) ] * 100, one cycle/period of waveform.

So measure high time, low, time, and plug into equation.

Many scopes do the measurement directly from a measurement menu selection.


Regards, Dana.

 

It will be easier to expand the display to show just one complete cycle then you can get a better measurement of the Time High and Time Low for your calculations.
The scope looks to display the Positive Width, so see if you can get the negative Width too.

 

Duty Cycle, in %, = [ Th / ( Tl + Th ) ] * 100, one cycle/period of waveform.

So measure high time, low, time, and plug into equation.

Many scopes do the measurement directly from a measurement menu selection.


Regards, Dana.

like dendad said the scope displays the positive width cant i use that to calculate duty cycle with the equation D= (pw(positive witdh)/T)*%?

 

It will be easier to expand the display to show just one complete cycle then you can get a better measurement of the Time High and Time Low for your calculations.
The scope looks to display the Positive Width, so see if you can get the negative Width too.

yes i can get the negative width too

 

Yes, dendad is correct, T = Th + Tl.

Regards, Dana.

 

I see that if the output of the 741 opamp ever goes negative then it will destroy the trigger input of the 555.