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Title:
DIGITAL TRANSMITTER
Document Type and Number:
Japanese Patent JPH048033
Kind Code:
A
Abstract:

PURPOSE: To transmit a transmission signal without phase deviation even when a communication satellite or an optical fiber cable, etc., is in use by adjusting a digital signal at every transmission line automatically so that each delay time difference is eliminated.

CONSTITUTION: A switch 103 switches digital data at every data to the position of (a) or (b) and a signal whose bit rate is halved is outputted to the terminals (a), (b), signal adders 107, 108 add a sync pattern and the result is transmitted through separate transmission lines 201, 202. A delay time comparator 308 counts the time difference of a sync pulse from sync detectors 306, 307, outputs a signal to a timing generator 309 controlling FIFOs 304, 305 so as to control the FIFOs 304, 305 in a such a manner that the delay times of the transmission lines 201, 202 are made equal to each other. Thus, the transmission of the digital signal using plural transmission lines is attained.


Inventors:
Kaneko, Tadashi
Application Number:
JP1990000108906
Publication Date:
January 13, 1992
Filing Date:
April 26, 1990
Export Citation:
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Assignee:
CANON INC
International Classes:
H04L27/00; H04L7/00; H04L25/40; H04L29/00; (IPC1-7): H04L7/00
Domestic Patent References:
JPH02305278A1990-12-18
JPH03201842A1991-09-03



 
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