Pulse or digital communications – Repeaters – Testing
Patent
1986-05-27
1989-04-11
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
375 17, 307260, H04L 2560
Patent
active
048212865
ABSTRACT:
A digital signal regenerator receives a four-level input signal, amplifies, reshapes, and retimes that signal into a regenerated four-level output signal. A wide range controlled equalizer amplifies and reshapes the four-level input signal into an intermediate signal. A variable all-pass circuit varies the shape of the equalizer's phase characteristic to optimally shape the four-level signal as a function of the maximum amplitude of the four-level input signal. The reshaped four-level signal is retimed and amplified into the regenerated four-level output signal. This enable multiplying the rate at which information is transmitted for a selected pulse rate in the transmission line.
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Graczyk James F.
Ludwick John J.
Parsons Edward S.
American Telephone and Telegraph Company
AT&T Bell Laboratories
Chin Stephen
Griffin Robert L.
Havill Richard B.
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