N-bit comparator

Details N-bit comparator N-bit comparator

1997-09-09

1999-11-16

Wambach, Margaret R.

Communications: electrical

Digital comparator systems

326 52, 326 54, 326 55, G06F 750

Patent

active

059865385

ABSTRACT:
An N-bit comparator compares two numbers A and B each consisting of N bits to each other and includes: N one-bit comparing circuits for generating a second output of a first level and a first output of a second level which is complementary to the first level if a bit ai (0.ltoreq.i.ltoreq.N-1) of the number A is equal to a bit bi (0.ltoreq.i.ltoreq.N-1) of the number B, for generating the second output of the second level and the first output of the first level if bit ai is greater than bit bi, and for generating the first output of the second level and the second output of the second level if bit ai is less than bit bi; and a final comparing circuit for receiving the first and second outputs of the one-bit comparing circuits and for generating a final comparative result of the two numbers by a comparative result of lower places when upper places of the two numbers are equal to each other.

REFERENCES:
patent: 4870305 (1989-09-01), Rocchj
patent: 5334888 (1994-08-01), Bodas
patent: 5357235 (1994-10-01), McClure

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