A 4 bit multiplier from a 2 bit multiplier

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4 bit multiplier from 2 bit multiplier

Can you make a multiplier which can multiply 4 bit inputs with the help of multipliers which can multiply 2 bit inputs and other logic ? Please provide the schematic.
 

Re: 4 bit multiplier from 2 bit multiplier

I can. No.
 

Re: 4 bit multiplier from 2 bit multiplier

Hi,

First please confirm
* that all input values have to be seen as unsigned integers.
* that your 2 x 2 multiplier has full 4 bits of utput value.

*******
My hint:

do a decimal multiplication step by step (each digit) by hand.
like "12 x 23"

Then do the same step by step with the binary multiplication.
If you don´t get the correct result, then show us how you did the calculation.

Klaus
 

Re: 4 bit multiplier from 2 bit multiplier

Think of the multiply problem (a+b)*(c+d). You get 4 partial products, then sum it.
 

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