Method of processing multi-level signals for simple clock recove

Details Method of processing multi-level signals for simple clock recove Method of processing multi-level signals for simple clock recove

1996-09-17

1998-10-20

Chin, Stephen

Pulse or digital communications

Multilevel

Synchronized

327 50, H04L 2549

Patent

active

058258256

ABSTRACT:
A method and a circuit for simple clock recovery from multi-level at high transmission rates. The circuit is compatible with standard PLL-type clock recovery techniques for NRZ and generalized two-level signalling. The timing information is extracted from a single threshold crossing, irrespective of the number of levels (M) of the signal. This was verified to provide sufficient spectral information for the proper operation of a clock recovery PLL. The threshold may be programmed for various line codes.

REFERENCES:
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patent: 4618941 (1986-10-01), Linder et al.
patent: 4651026 (1987-03-01), Serfaty et al.
patent: 5115450 (1992-05-01), Arcuri
patent: 5237590 (1993-08-01), Kazawa et al.
"Manchester Coding with Predistortion: An Efficient and Simple Transmission Technique in Local Digital Ring Networks", H. Meyr et al., IBM Zurich Research Laboratory, 8803 Ruschlikon, Switzerland, H. Bouten, Techn. University, RWTH Aachen, W. Germany 1980 IEEE, pp. 65.4.1-65.4.7.

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