8bit comparator from 2-4bit TTL 7485 ? [with Picture]

Thread Starter

parkhid

Joined Dec 20, 2010
7
Ever lasting...
Hi every one :
By :Following this picture which shows a 8bit comparator with 2 4bit comparator.


what are the cascaded inputs ? and why we should compare 0-3 bits first then 4-7 ?

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Regards.
Thanks in advance
 
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