Reproduction clock phase correction circuit

Details Reproduction clock phase correction circuit Reproduction clock phase correction circuit

1996-12-05

1998-09-01

Dinh, Tan

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 57, G11B 509

Patent

active

058020276

ABSTRACT:
The present invention provides a reproduction clock phase correction circuit, which can detect and set a phase exceeding one clock (one pit), in which a resolution and a detection range are never changed even if a clock frequency is changed.
The reproduction clock phase correction circuit is provided with a voltage control oscillator in which delay element in a plurality of stages are connected in a form of a ring, a clock selecting means for selectively extracting an output clock of the delay element at any stage in the voltage control oscillator as a reproduction clock, a sampling means for sampling, on the basis of the reproduction clock, a reproduction signal of a reference clock reproduced from a record medium, and a selection controlling means for detecting phase information of the reproduction clock for the reference clock on the basis of a sampling value by mean of the sampling means to thereby control the clock selecting means on the basis of the phase information.

REFERENCES:
patent: 5172357 (1992-12-01), Taguchi
patent: 5253243 (1993-10-01), Suzuki
patent: 5440532 (1995-08-01), Yokogawa et al.
patent: 5606540 (1997-02-01), Hayashi
patent: 5615191 (1997-03-01), Takeda et al.

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