Starlan coded data transceiver collision detection circuit

Details Starlan coded data transceiver collision detection circuit Starlan coded data transceiver collision detection circuit

1986-12-12

1987-12-01

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

371 57, 375 36, 455 58, H04B 140

Patent

active

047109432

ABSTRACT:
A daisy chain collision detection circuit for use with a StarLAN coded data transceiver includes a voltage comparator having an inverting input, a non-inverting input and an output. The inverting input of the voltage comparator is responsive to differential output voltages from a differential line drive and transient spike voltages from the primary of an isolation transformer. A charging capacitor is connected to the non-inverting input of the voltage comparator. The capacitor is charged to a reference voltage which is directly proportional to the peak voltage of the differential output voltages. The output of the voltage comparator provides an internal collision detection signal which is switched from a high logic level to a low logic level upon the occurrence of a daisy chain collision.

REFERENCES:
patent: 4476467 (1984-10-01), Terwilliger et al.
patent: 4519074 (1985-05-01), Basile
patent: 4649548 (1987-03-01), Crane

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