Hi!
Can anyone explain me how to calculate duty cycle for a modulo 175 frequency divider using inverse 4 bit counters?
I know that DC=Thigh/Period, and i deducted that period is 175, but how i calculate period when the signal is on 1(Thigh)
I deducted that useful output is 2^7 from 175=10101111 reset state.
Can anyone explain me, please.

 

Your post makes almost no sense.

What are "inverse 4-bit counters"?

How are you using them, whatever they are, to make a modulo-175 frequency divider?

What determines when your output is HI and when it is LO?

What is "useful output"?

What is it that you are trying to achieve?

 

The answer to the title question is that you have a great deal of latitude in choosing the duty cycle of a frequency divider. The choices do produce discrete results, so for example a 50% duty cycle is not always achievable. For frequency division it doesn't matter if the counters count up or count down.