Patents by Inventor Rajul Ramesh Shah

Rajul Ramesh Shah 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: 8624571
    Abstract: A DC-DC converter system having at least one DC-DC converter operating in either a PWM mode or a PFM mode is provided. The DC-DC converter system includes a state machine configured to control the switching between the PWM mode and PFM mode. The state machine determines whether an inductor current provided by the DC-DC converter reaches a first specified value for a selective number of clock cycles so switching between the PWM mode and PFM mode is to occur. A pulse generator circuit is connected to the state machine and being configured to provide the appropriate switching period for the PWM mode and the PFM mode at the time of switching. The pulse generator circuit is shared amongst the PWM mode or PFM mode and utilizes a master clock for its operations.
    Type: Grant
    Filed: December 24, 2009
    Date of Patent: January 7, 2014
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: José Barreiro da Silva, Rajul Ramesh Shah, Patrick Stanley Riehl
  • Publication number: 20110156684
    Abstract: A DC-DC converter system having at least one DC-DC converter operating in either a PWM mode or a PFM mode is provided. The DC-DC converter system includes a state machine configured to control the switching between the PWM mode and PFM mode. The state machine determines whether an inductor current provided by the DC-DC converter reaches a first specified value for a selective number of clock cycles so switching between the PWM mode and PFM mode is to occur. A pulse generator circuit is connected to the state machine and being configured to provide the appropriate switching period for the PWM mode and the PFM mode at the time of switching. The pulse generator circuit is shared amongst the PWM mode or PFM mode and utilizes a master clock for its operations.
    Type: Application
    Filed: December 24, 2009
    Publication date: June 30, 2011
    Inventors: José Barreiro da Silva, Rajul Ramesh Shah, Patrick Stanley Riehl