Patents by Inventor Glao Minh Pham

Glao Minh Pham 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).

  • Method and apparatus to improve frequency stability of an integrated circuit oscillator
    Patent number: 7034625
    Abstract: A method and apparatus providing a simple low cost integrated circuit oscillator with improved frequency stability over a range of selected frequencies by reducing the impact of process and temperature variations on a base current of bipolar transistor of the integrated circuit oscillator. A voltage follower circuit included in an integrated circuit oscillator provided to is injected with a base current provided by a current mirror instead of a capacitor such that variations in the base current of the bipolar transistor over the range of operating temperature do not substantially alter the charge in the capacitor to change the frequency of the oscillator.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: April 25, 2006
    Assignee: Power Integrations, Inc.
    Inventor: Glao Minh Pham