Token ring equalizer

Details Token ring equalizer Token ring equalizer

1990-09-21

1992-07-21

Smith, Jerry

Boots, shoes, and leggings

375 14, 375118, 375120, G06G 702, H03H 730, H04L 700, H03D 324

Patent

active

051329263

ABSTRACT:
An improved local area network ring node of the type described in ANSI/IEEE Standard 802.5, including a receiver having an input connectable to the ring, a phase-locked loop circuit for extracting a clock frequency from the receiver output and including a phase detector for generating a phase error signal, and a data demodulator connected for demodulating at the extracted clock frequency the data in the receiver output. The improvement lies in the provision of a filter for deriving a control signal from the outputs of the data demodulator and the phase detector and an adaptive equalizer for reducing the effect of jitter in signals applied to the receiver input from the network, the equalizer comprising a filter network including a voltage variable impedance so connected as to vary responsively to the control signal.

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patent: 4856031 (1989-08-01), Goldstein
patent: 4953186 (1990-08-01), Levy et al.

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