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Two Out of Five Check Circuit

IP.com Disclosure Number: IPCOM000096221D
Original Publication Date: 1963-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Saxenmeyer, GJ: AUTHOR

Abstract

This shows the minimal logic for a two out of five check circuit. In A, the left hand group of five 2-way And's defines the pentagon of drawing B. The right hand group of five 2-way And's defines the inscribed pentagram. A count of more than two out of five is definable as the completion of at least one triangle of B. Any triangle must consist of one element of either the pentagon or the pentagram and two elements of the other, as shown by the shaded triangle ABC.

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Two Out of Five Check Circuit

This shows the minimal logic for a two out of five check circuit. In A, the left hand group of five 2-way And's defines the pentagon of drawing B. The right hand group of five 2-way And's defines the inscribed pentagram. A count of more than two out of five is definable as the completion of at least one triangle of
B. Any triangle must consist of one element of either the pentagon or the pentagram and two elements of the other, as shown by the shaded triangle ABC.

A bit count of less than two out of five is defined by the absence of both the pentagon and the pentagram, representing the lack of output from both 5 way Or's. By combining the less than and more than outputs, the signal Not Two is developed.

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