Auto-adjustment circuit for collision detection of ethernet

Details Auto-adjustment circuit for collision detection of ethernet Auto-adjustment circuit for collision detection of ethernet

1995-01-27

1996-11-05

Hsu, Alpus H.

Multiplex communications

Wide area network

Packet switching

370 853, 370 941, H04L 12413

Patent

active

055725112

ABSTRACT:
A circuit for collision detect of ethernet mainly includes a comparator, a controlling logic, level adjusters, collision counters and a packed length detector. The collision counter is used to detect a collision frequency of Ethernet data transmission. When the collision detector makes any error in collision detection, the controlling logic will drive the level adjusters to adjust the collision level signal up or down to provide more accurate collision detection. An additional packet length detector is used for detecting the length of data packets, so that abnormal short packets can be detected and, if so, a collision signal can be sent in the network.

REFERENCES:
patent: 4345250 (1982-08-01), Jacobsthal
patent: 4679193 (1987-07-01), Jensen et al.
patent: 5079766 (1992-01-01), Richard et al.
patent: 5355375 (1994-10-01), Christensen

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