Collision filter
US5107491A · kind A · utility
7Cited by
7References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1990 |
| Grant date | Apr 21, 1992 |
| Priority date | — |
| Expiry date | Feb 20, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/413
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
There is disclosed a collision filter for use in a network to detect a fault condition wherein two or more nodes are simultaneously transmitting on the network. The fault condition is characterized by an increased average DC voltage level on the network. The collision filter includes a low pass filter stage having an input coupled to the network and an output and a notch filter having an input coupled to the low pass filter stage output. The notch filter has at least one attenuation notch at a desired frequency and an output for providing the increased average DC voltage level responsive to a fault condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.