Matching of digital patterns using analog logic

Details Matching of digital patterns using analog logic Matching of digital patterns using analog logic

1995-03-01

1996-08-27

Wambach, Margaret Rose

Communications: electrical

Digital comparator systems

G05B 100

Patent

active

055505287

ABSTRACT:
A fast, low power and small size approach to matching digital patterns provides for comparing of the input pattern bit-by-bit against the reference pattern to determine matches. In the illustrative embodiment, each mismatch turns on a current source. When the current from mismatches exceeds a maximum current sink value, the pattern mismatch output goes high. Both the reference pattern as well as the number of bits that must match may conveniently be made programmable. This approach is especially useful in "fuzzy" matching, where any N bits of an M bit pattern must match to consider the pattern matched.

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