Fault detector for communications equipment using exclusive or circuitry
US4658206A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1984 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Dec 31, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/14
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A fault detector is designed to detect abnormality of a transmission apparatus which transmits burst type signals such as a satellite communications equipment by wave-reforming the input and the output signal of the transmission apparatus, and executing an exclusive OR operation to both wave-reformed signals. An exclusive OR circuit which executes an exclusive OR operation by detecting whether either of the two wave-reformed signals exists at the rising or the falling of the other wave-reformed signal provides a highly precise result. An exclusive OR circuit which assures that the signal level is within a predetermined range at wave-reforming the output signal of the transmission apparatus enhances the preciseness to a greater extent in detection of abnormality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.