Patents by Inventor Vanitha Kuppusamy

Vanitha Kuppusamy 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, system and apparatus for reducing oscillator frequency spiking during oscillator frequency adjustment
    Patent number: 7432773
    Abstract: Current sources are selectively coupled to a current controlled frequency determining circuit of an oscillator. A buffer amplifier has an input coupled to the current controlled frequency determining circuit of the oscillator and the buffer amplifier output is selectively coupled to the current sources not coupled to the frequency determining circuit of the oscillator. The buffer amplifier output maintains substantially the voltage of the current controlled frequency determining circuit on each of the current sources not coupled to the frequency determining circuit so that when any current source is coupled thereto, there is substantially no voltage difference therebetween. This substantially prevents generation of undesirable frequency spikes during coupling of the current sources to the frequency determining circuit of the oscillator.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: October 7, 2008
    Assignee: Microchip Technology Incorporated
    Inventors: Vanitha Kuppusamy, Clark Rogers
  • Method, System and Apparatus for Reducing Oscillator Frequency Spiking During Oscillator Frequency Adjustment
    Publication number: 20070090884
    Abstract: Current sources are selectively coupled to a current controlled frequency determining circuit of an oscillator. A buffer amplifier has an input coupled to the current controlled frequency determining circuit of the oscillator and the buffer amplifier output is selectively coupled to the current sources not coupled to the frequency determining circuit of the oscillator. The buffer amplifier output maintains substantially the voltage of the current controlled frequency determining circuit on each of the current sources not coupled to the frequency determining circuit so that when any current source is coupled thereto, there is substantially no voltage difference therebetween. This substantially prevents generation of undesirable frequency spikes during coupling of the current sources to the frequency determining circuit of the oscillator.
    Type: Application
    Filed: September 12, 2006
    Publication date: April 26, 2007
    Applicant: MICROCHIP TECHNOLOGY INCORPORATED
    Inventors: Vanitha Kuppusamy, Clark Rogers