×

Token ring synchronization

  • US 5,090,025 A
  • Filed: 07/24/1990
  • Issued: 02/18/1992
  • Est. Priority Date: 07/24/1990
  • Status: Expired due to Term
First Claim
Patent Images

1. In a local network of the type described in ANSI/IEEE Standard 802.5, a node having a a ring monitor circuit and a reclocking circuit operably alternatively to one another, said network node including a receiver-demodulator incorporated a first phase locked loop and having an input connectable to the network and having an output providing received data and an output providing a received clock, an elasticity buffer connected to the received data output of said receiver-demodulator, and means for modulating said received data onto a clock signal extracted from said received clock, an improvement wherein said reclocking circuit includes:

  • a second phase-locked loop connected in a transmission line between said received clock output of said receiver-demodulator and a received data input to said means for modulating, the bandwidth of said second phase-locked loop being narrower than the bandwidth of said first phase-locked loop.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×