2's complement with JK and Multiplexer

[Claudinho18]

Hi all ,
I try to create a circuit who can show the 2's complement for 8 bit numbers.I have to use JK Flip Flop and Multiplexer but i am not understand how these are connecting.I have IC CD4027 but i don't know how to use it in combination with Mux and how many JK are necessary.
Can someone give me an electrical schema or any advice?
Thanks.

 

[KlausST]

Hi,

Can someone give me an electrical schema or any advice?

Please read how 2's complement is defined.
Then - according this knowledge - try to find a solution on your own.
Show us your solution and we will comment / correct it.

There are many possible solutions. And I think this is the challenge: find your own solution.

Hint: I can't remember that a 2's complement definition uses a clock.
But your JK-Flipflop is a clocked device...

Klaus

 

[Claudinho18]

Hi,
I tried to make an circuit.
I try to make CD4027 to become an inverter( for 1's complement) and multiplexer for create an adder which add 1 to that number.I guess that now i have an inverter but i don't know how to create that adder. Thanks.