Timing-phase control system for duobinary transmission

Details Timing-phase control system for duobinary transmission Timing-phase control system for duobinary transmission

1979-02-14

1980-06-10

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

328155, 178 70R, 375 4, 375 97, H04L 2560, H03K 1100, H04B 336

Patent

active

042075289

ABSTRACT:
A timing-phase control system provided on the receiving side of a duobinary transmission system is adaptable to high-speed PCM repeater systems using a wide-band transmission medium such as a coaxial cable. The system includes a discriminating and regenerating circuit for recovering the transmitted digital signal by discriminating and regenerating in an appropriate timing phase based on an input equalized duobinary waveform, a phase varying circuit for varying the phase of a timing signal externally supplied to the discriminating and regenerating circuit, and a derivative waveform generating circuit. In one embodiment, the derivative waveform generating circuit is responsive to the output of the discriminating and regenerating circuit, and a multiplier multiplies the output of the derivative waveform generating circuit and the equalized duobinary waveform by each other in a predetermined phase relationship. In another embodiment, the derivative waveform generating circuit differentiates the equalized duobinary waveform on a time scale, and a multiplier multiplies the output of this differentiating circuit and that of the discriminating and regenerating circuit in a predetermined phase relationship. In either case, a low-pass amplifier amplifies the output of the multiplier to provide, with a suitable D.C. offset, a negative feedback signal to the phase varying circuit.

REFERENCES:
patent: 2227902 (1941-01-01), Hahnle
patent: 4078159 (1978-03-01), Lender et al.
patent: 4123625 (1978-10-01), Chow

Affiliated with

Also associated with

Rating

Timing-phase control system for duobinary transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Timing-phase control system for duobinary transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Timing-phase control system for duobinary transmission will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-865359