Patents by Inventor Guruprakash Radhakrishnan

Guruprakash Radhakrishnan 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).

  • High frequency connector-less charging scheme
    Patent number: 7876067
    Abstract: A connector-less charging circuit includes a transformer having a primary side associated with a secondary side. A primary switch is responsive to a control signal for connecting the transformer to ground during a first portion of a duty cycle, and disconnecting the transformer from ground during the second portion of the duty cycle. An active clamp circuit connects to the primary side of the transformer for recycling leakage energy from the transformer back to the source responsive to the control signal during the second portion of the duty cycle. A PWM controller generates the control signal to both the active clamp circuit and the primary switch.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: January 25, 2011
    Assignee: Intersil Americas Inc.
    Inventors: Fred Greenfeld, Guruprakash Radhakrishnan
  • HIGH FREQUENCY CONNECTOR-LESS CHARGING SCHEME
    Publication number: 20080116846
    Abstract: A connector-less charging circuit includes a transformer having a primary side associated with a secondary side. A primary switch is responsive to a control signal for connecting the transformer to ground during a first portion of a duty cycle, and disconnecting the transformer from ground during the second portion of the duty cycle. An active clamp circuit connects to the primary side of the transformer for recycling leakage energy from the transformer back to the source responsive to the control signal during the second portion of the duty cycle. A PWM controller generates the control signal to both the active clamp circuit and the primary switch.
    Type: Application
    Filed: April 18, 2007
    Publication date: May 22, 2008
    Applicant: INTERSIL AMERICAS INC.
    Inventors: FRED GREENFELD, GURUPRAKASH RADHAKRISHNAN