Patents by Inventor Frank Gasparik

Frank Gasparik 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).

  • Extendible-range voltage controlled oscillator
    Patent number: 5477198
    Abstract: A circuit design extending the range and linearizing the transfer characteristic of a fast voltage controlled oscillator (VCO). In addition, a multi-range VCO is described. Range extension is achieved by modifying the delay cell of a current controlled ring oscillator. The VCO transfer characteristic is linearized by piece-wise linear current control added to the delay cell. Additionally, a VCO capable of multi-range operation is provided. With the addition of multiple current sources which control booster inverter current, and by selectively enabling the additional current sources, a VCO with multiple frequency ranges can be achieved.
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: December 19, 1995
    Assignees: AT&T Global Information Solutions Company, Hyundai Electronics America
    Inventors: Michael B. Anderson, Frank Gasparik
  • Slew rate control
    Patent number: 4250460
    Abstract: The slew rate of an electronic operational amplifier is maximized by inserting additional capacitance calculated according to the equation. ##EQU1## The capacitance may be connected across the amplifier current source to provide additional transient current flowing through the input differential pair and thus increase slew rate without affecting the amplifier's stability.
    Type: Grant
    Filed: January 30, 1979
    Date of Patent: February 10, 1981
    Assignee: Harris Corporation
    Inventor: Frank Gasparik