Surrounding circuit for the ethernet coaxial local area newtwork

Details Surrounding circuit for the ethernet coaxial local area newtwork Surrounding circuit for the ethernet coaxial local area newtwork

1993-06-23

1995-06-13

Chin, Stephen

Pulse or digital communications

Cable systems and components

Transformer coupling

375219, 375295, 327170, 327100, H04B 300, H04L 2500

Patent

active

054250544

ABSTRACT:
A surrounding circuit for the local area network transceiver comprises isolation transformer, electric resistance, Diodes, transmitting circuit, transistor, electric capacitor, and input circuit; in order to slow down the rising time and falling time of the signal, the circuit can effectively improve the output signal waveform at the secondary coil of the isolation transforming and make it similar to sine wave which decreases the possibility of high frequency radiation. The circuit also provides a receiving surrounding circuit connected to the output of the transmitting surrounding apparatus which can eliminate the Common Mode Noise, has the effect of isolation, and at the same time allows the low-frequency collision signal to enter the transceiving circuit and maintains enough high input impedance.

REFERENCES:
patent: 4649548 (1987-03-01), Crane
patent: 4710943 (1987-12-01), Duley et al.
patent: 5128962 (1992-07-01), Kerslake et al.

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