Patents by Inventor Ravi Kumar DVJ

Ravi Kumar DVJ 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).

  • Patent number: 6911868
    Abstract: In a phase-locked loop (PLL) frequency synthesizer, a first frequency divider divides an output signal from a voltage-controlled oscillator by a first divider value. A second frequency divider divides a reference signal by a second divider value. A charge pump increases a voltage level on a loop filter by injecting a charge pump current and decreases the voltage level on the loop filter by draining the charge pump current. A loop response control circuit adjusts the charge pump current. In particular, the first divider value may lie within one of a first plurality of ranges and/or the second divider value may lie within one of a second plurality of ranges. The charge pump current is adjusted based at least partially on which of the first plurality of ranges the first divider value lies within and/or which of the second plurality of ranges the second divider value lies within.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: June 28, 2005
    Assignee: National Semiconductor Corporation
    Inventor: Ravi Kumar DVJ