Patents by Inventor David Sardin

David Sardin 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).

  • Radio-frequency power amplifier with fast envelope tracking
    Patent number: 8669811
    Abstract: A radio-frequency power amplifier with envelope tracking, comprising: a power RF amplifying device for amplifying a RF signal; and a switching DC/DC converter, comprising a switching device and a rectifying device, for providing said power RF amplifying device with a DC power supply at a voltage level proportional to an envelope of said RF signal; wherein said switching device is a RF power transistor; characterized in that said rectifying device, and preferably also said power RF amplifying device, is also a transistor of a same technology, connected as a two-terminal device. Preferably, said power RF amplifying device is also a transistor of said same technology. A low-pass filter can also be provided for reducing the bandwidth of the envelope signal on which the PWM signal driving the DC/DC converter depends.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: March 11, 2014
    Assignee: Agence Spatiale Europeenne
    Inventors: Nicolas Le Gallou, Christophe Delepaut, David Sardin, Michel Campovecchio
  • Radio-Frequency Power Amplifier with Fast Envelope Tracking
    Publication number: 20120062323
    Abstract: A radio-frequency power amplifier with envelope tracking, comprising: a power RF amplifying device for amplifying a RF signal; and a switching DC/DC converter, comprising a switching device and a rectifying device, for providing said power RF amplifying device with a DC power supply at a voltage level proportional to an envelope of said RF signal; wherein said switching device is a RF power transistor; characterized in that said rectifying device, and preferably also said power RF amplifying device, is also a transistor of a same technology, connected as a two-terminal device. Preferably, said power RF amplifying device is also a transistor of said same technology. A low-pass filter can also be provided for reducing the bandwidth of the envelope signal on which the PWM signal driving the DC/DC converter depends.
    Type: Application
    Filed: September 13, 2011
    Publication date: March 15, 2012
    Applicant: AGENCE SPATIALE EUROPEENNE
    Inventors: Nicolas Le Gallou, Christophe Delepaut, David Sardin, Michel Campovecchio