design circuit (mentor graphic)

[kingmaker]

I need to design a circuit based on standard cell

- Use Silterra 0.18 um CMOS process technology
- Use tools from Mentor Graphics
- Circuit that need to be designed is count the number of times of bit changing from 0 to 1
- The input to the circuit is 4 binary bits

let the 4bit binary as A B C D, and the number of times of bit changing from 0 to 1 as X Y Z where X=0 time Y=1 time Z=2 time.

start from table, then use k-map to find the boolean equation. then i draw the gate logic based on the equation with DA. afterward then only draw the layout with IC. is it correct?

 

[mfarooq1]

you can also use a counter with rising edge detector and the input signal will be your clock to the counter when ever a 0 to 1 transition is detected it will increment the count