Data bus pilot tone

Details Data bus pilot tone Data bus pilot tone

1985-01-30

1987-07-28

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

34082505, 370 85, 370 74, H04Q 300, H04J 102, H04N 302

Patent

active

046834710

ABSTRACT:
A local area network transceiver (10) which includes a transmitter section (20) for providing a data signal and a pilot tone signal which are combined as a transmit signal for transmission on a local area network data bus (11). The transceiver further includes a receiver section (30) which receives signals on the data bus (11) and includes circuitry for filtering the received signal into a received data signal and a received pilot tone signal (23,25,27). Comparison circuitry (29,31,33) is responsive to the transmit pilot tone signal and the received pilot tone signal, and produces an output indicative of whether the received pilot originated from the transmit pilot tone. Logic circuitry (35,37,39,41,43) is responsive to the comparison output to provide outputs indicative of whether transmission collision has occurred or whether activity is present on the data bus.

REFERENCES:
patent: 4063220 (1977-12-01), Metcalfe et al.
patent: 4101738 (1978-07-01), Bellanger et al.
patent: 4238849 (1980-12-01), Gassmann
patent: 4259663 (1981-03-01), Gable
patent: 4390990 (1983-06-01), Ainsworth
patent: 4432088 (1984-02-01), Frankel
patent: 4466000 (1984-08-01), Jansen et al.
patent: 4519074 (1985-05-01), Basile
patent: 4596011 (1986-06-01), Kobayashi et al.
patent: 4617656 (1986-10-01), Kobayashi et al.

Affiliated with

Also associated with

Rating

Data bus pilot tone does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data bus pilot tone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data bus pilot tone will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2036952