Patents by Inventor Mario T. Caresosa

Mario T. Caresosa 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).

  • High speed gain stage with DC offset cancellation for servo demodulator circuit
    Patent number: 6204980
    Abstract: An integrated circuit servo system demodulator that incorporates a high speed gain stage with DC offset cancellation. The gain stage receives a differential voltage signal representing a servo burst and converts the differential voltage signal to a differential current signal by a transconductance amplifier. The differential current signal is full-wave current rectified and converted to a full-wave rectified voltage signal by a transimpedance amplifier. A DC offset cancellation circuit is coupled between the full-wave current rectifier and transimpedance amplifier and functions to mirror and subtract, from the rectified current signal directed to the transimpedance amplifier, any DC leakage current developed by the rectifier which would generate a DC offset voltage through the transimpedance amplifier.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: March 20, 2001
    Assignee: Adaptec, Inc.
    Inventors: Afshin D. Momtaz, Mario T. Caresosa