is there some IC can change the signal from Non-return-to-Zero to Return-to-Zero ?

[timedate]

Of course I can use "And gate" to get a 50% return to zero data,

but i want to change to duty cycle of output data from 10-50%,

So, is there some IC can do this job ?

 

[THUMMAR]

Yes sure you can have your duty cycle of 10-50%; and also more than 50%
Just use 555 timer in Astable mode

 

[powermanonboard]

IC7408 AND Gates is the most common one that i know