Circuit for producing clock pulses from an inputted base band si

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Regenerating or restoring rectangular or pulse waveform

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Details

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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