Method and apparatus of checking to determine if a signal is present on more than one of n lines
US4020460A · kind A · utility
15Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1975 |
| Grant date | Apr 26, 1977 |
| Priority date | — |
| Expiry date | Nov 13, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/085
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
This specification describes an apparatus for determining if more than one of n lines are up at a given time. The apparatus includes means for encoding the n lines into m lines where n = 2.sup.m. Two encoding signals are generated; one, X.sub.0 X.sub.1 . . . X.sub.m, complement of the other, Z.sub.0 Z.sub.1 . . . Z.sub.m. These two signals are Ex OR'd in accordance with the formula (X.sub.0 Z.sub.0) .sup.. (X.sub.1 Z.sub.1) . . . (X.sub.m Z.sub.m). If more than one line is up, the resultant of the Ex OR operation is one. Otherwise the resultant is zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.