Pulse or digital communications – Repeaters – Testing
Patent
1989-05-10
1993-03-23
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
328164, 375106, H04L 2520
Patent
active
051970821
ABSTRACT:
Disclosed is a digital signal regenerator responsive to a data bit stream having a predetermined bit rate for generating a retimed data bit stream. The digital signal regenerator includes a transition detect and pulse generating circuit responsive to the data bit stream for detecting transition positions between two different states of the data bit stream and for generating respective width-variable pulses at the transition positions. Filtering circuitry responsive to the width-variable pulses is provided for extracting a timing wave from the data bit stream. A clock-pulse generating circuit responsive to the timing wave is provided for generating a clock pulse sequence. A discriminating circuit responsive to the clock pulse sequence is lastly provided for discriminating between levels "1" and "0" of the data bit sequence to generate the retimed data bit stream.
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R. L. Rosenberg et al., "Optical Fiber Repeatered Transmission Systems Utilizing SAW Filters", IEEE Transactions on Sonics and Ultrasonics, vol. 30; No. 3 (May 1983), pp. 119-126.
Takahashi Nobuaki
Uda Yoshihiro
NEC Corporation
Safourek Benedict V.
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