Title:
METHOD AND CIRCUIT FOR ADJUSTING DATA DETECTION LEVEL FOR DISK DRIVING DEVICE
Document Type and Number:
Japanese Patent JP2596704
Kind Code:
B2
Abstract:
PURPOSE: To variably adjust a data detection level adaptively for an operating environment even without changing a hardware for each disk driving device.
CONSTITUTION: Level control data are generated through setting at a control means 100 so that a pulse width modulate(PWM) signal having duty to be variably set is inputted from a PWM signal generating means 200 to a level setting means 300. A level detecting means 310 detects a DC voltage level by smoothing the PWM signal and generates the data detection level by superimposing this level on a set DC voltage level through a superimposing means 320. This data detection level is hysteresis-compared with a signal from the disk. In response to a servo synchronizing signal generated at the servo block of the disk, a servo read control means 330 stops superimposing the DC voltage level at the superimposing means 320.
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Inventors:
Youn
Application Number:
JP23955593A
Publication Date:
April 02, 1997
Filing Date:
September 27, 1993
Export Citation:
Assignee:
Samsung Electronics Co.,Ltd.
International Classes:
G11B20/04; G11B20/10; G11B20/18; H03K5/08; H03K9/08; (IPC1-7): G11B20/10
Attorney, Agent or Firm:
Takeshi Takatsuki