Circuit for producing clock pulses from an inputted base band si

Details Circuit for producing clock pulses from an inputted base band si Circuit for producing clock pulses from an inputted base band si

1998-03-31

2000-05-23

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Regenerating or restoring rectangular or pulse waveform

327166, 327191, H03K 501

Patent

active

060669705

ABSTRACT:
In order to reproduce a clock having little jitter in the clock reproduction in data transmission, a reproduced clock is outputted by sampling an inputted base band signal by using sampling pulses by means of a sampler and shaped by means of a flip-flop. Errors of the sampling timing are detected by sampling the base band signal two times with a predetermined interval for each bit and by comparing magnitude of fluctuations of preceding sampled values with magnitude of fluctuations of succeeding sampled values. A clock reproduced circuit acts as a phase synchronizing loop circuit during bit synchronizing signal periods, while during data signal periods errors of the sampling timing are corrected by using an output of the error detection.

REFERENCES:
patent: 4160951 (1979-07-01), Thyselius
patent: 5510743 (1996-04-01), Shi
patent: 5546032 (1996-08-01), Yatagai

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