Title:
DIGITAL SIGNAL REPRODUCING DEVICE
Document Type and Number:
Japanese Patent JP3528272
Kind Code:
B2
Abstract:
PURPOSE: To surely draw in an asymmetry correction amount by switching a switch means to an asymmetry detection circuit when a difference between a level of an asymmetry detection signal and a level of a mean value signal becomes a prescribed value or below.
CONSTITUTION: The digital signal reproducing device is switched to a mean value circuit 8 side by a control circuit 4 in the initial state, and when a clock reproducing circuit 11 becomes to be in a lock state, and when the level of the asymmetry detection signal from the asymmetry detection circuit 14 becomes a prescribed value or above, a switch means 9 is switched to the asymmetry detection circuit 14 side. In such a case, even in a modulation system with a DC component, and even when no data lock is reproduced, asymmetry is detected effectively, and the asymmetry correction amount is surely drawn within a prescribed draw range even when a lock of a PLL comes off.
Inventors:
Kanno, Masaki
Kumai, Satoshi
Kumai, Satoshi
Application Number:
JP24545894A
Publication Date:
May 17, 2004
Filing Date:
October 11, 1994
Export Citation:
Assignee:
SONY CORP
International Classes:
G11B20/14; G11B7/005; G11B20/10; G11B20/22; H03K5/01; (IPC1-7): G11B20/14; G11B7/005; G11B20/10
Attorney, Agent or Firm:
角田 芳末 （外２名）
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