Patents by Inventor Yusue A. Haque

Yusue A. Haque 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).

  • Integrated circuit filter with reduced die area
    Patent number: 4853759
    Abstract: An electronic filter which has particular application for use as an antialiasing filter in sampled data systems fabricated so as to utilize high resistivity diffused regions (36, 37) within the semiconductor body (31), as opposed to low resistivity polycrystalline silicon resistors. Furthermore, the values of the resistors and capacitors selected for use in a filter constructed in accordance with this invention are such that the high resistivity resistors require a small amount of space, and are physically located beneath the capacitors (33, 34, 35) used in the filter of this invention. The lower plate (33) of the capacitor is connected to a fixed voltage potential, thereby in effect shielding the underlying resistors from the deleterious effect of changes in voltage, and thus preventing the modulation of the resistance values of the resistors.
    Type: Grant
    Filed: April 28, 1988
    Date of Patent: August 1, 1989
    Assignee: American Microsystems, Inc.
    Inventor: Yusue A. Haque