Digital Circuit Fundamentals 1 Unit 6 – 4-BIT Comparator
Each stage compares one bit of each word. The decision about each comparison is passed to the
decoding stage, where all results are combined and placed on the comparator output terminals.
Information between input comparison stages flows through an internal pipeline.
The LS85 comparator has a set of greater than (>), equal to (=), and less than (<) inputs and
outputs. The inputs are used to select how a decision is represented at the comparator output.
This table shows comparisons between various 4-bit words.
NEW TERMS AND WORDS
magnitude comparator - an IC or circuit used to compare two words and to decide which word
has a greater value.
pipeline - refers to a pathway over which data can flow.