Patents by Inventor Mahesh K. Sambhu

Mahesh K. Sambhu 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).

  • Controller which uses pulse width and pulse frequency modulated signals to control a variable
    Patent number: 5162987
    Abstract: A controller is disclosed which uses pulse width ("PWM") and pulse frequency ("PFM") modulated signals to control a variable to a desired value, the PWM and PFM signals generated through calculation of the difference between the variable and the desired value and then by routing either the PWM or the PFM to the final control element or elements, thereby performing the functions of a proportional and integral controller. Derivative action is also disclosed by differentiating the difference, after filtering, and using the relationship between the difference and the differential to determine the routing of the output signal to the final control element or elements.
    Type: Grant
    Filed: December 28, 1990
    Date of Patent: November 10, 1992
    Assignee: Leslie Controls, Inc.
    Inventor: Mahesh K. Sambhu