Patents by Inventor Hwan S. Chun

Hwan S. Chun has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Variable gain digital servo system with improved resolution and reduced quantization error
    Patent number: 5416759
    Abstract: A digital servo system for servo controlling a prescribed function of a host device, e.g., the tracking servo function of an optical disk drive. The digital servo system includes a variable gain amplifier for amplifying an analog error signal issued by the host device, an A/D converter for converting the analog error signal to a digital error signal, an adder for adding a wobbling signal to the digital error signal to produce a composite digital error signal, digital signal processing circuitry for processing the composite digital error signal to produce a processed digital error signal, a D/A converter for converting the processed digital error signal to an analog servo control signal to be used in servo controlling the prescribed function of the host computer.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: May 16, 1995
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hwan S. Chun