Data reproducing apparatus having equalization characteristics w

Details Data reproducing apparatus having equalization characteristics w Data reproducing apparatus having equalization characteristics w

1995-12-18

1999-03-23

Chin, Stephen

Pulse or digital communications

Equalizers

360 65, 375376, 333 28R, H03H 730, H03D 324

Patent

active

058870300

ABSTRACT:
A reproducing apparatus includes an equalizer for equalizing reproduced data, a clock generating circuit for generating a clock synchronized with the reproduced data, and a phase difference detector for detecting a phase difference between the reproduced data equalized by the equalizer and the clock. The clock generating circuit receives an output from the phase difference detector as a control signal, and generates a clock of frequency according to the output from the phase difference detector. The equalization characteristic of the equalizer is controlled by the control signal of the clock generating circuit. With this arrangement, it is possible to generate a clock which follows a variation in the frequency of the reproduced data, and it is also possible to realize an optimum equalization characteristic according to the variation in the frequency of the reproduced data.

REFERENCES:
patent: 3818359 (1974-06-01), Hekimian
patent: 4361892 (1982-11-01), Martin
patent: 4413240 (1983-11-01), Dyke
patent: 4737866 (1988-04-01), Ebata
patent: 4943789 (1990-07-01), Surie
patent: 5166955 (1992-11-01), Ohta
patent: 5202655 (1993-04-01), Hara
patent: 5231390 (1993-07-01), Mittel
patent: 5572163 (1996-11-01), Kimura et al.

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