Patents by Inventor Edwin Li

Edwin Li 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).

  • Publication number: 20090305647
    Abstract: A balun that includes a first conductor, a second conductor, and a third conductor. The first conductor has a first length. The first conductor also has a first end connected to a first balanced power amplifier output port. The second conductor has substantially the same first length. The second conductor also includes a first end connected to a second balanced power amplifier output port and a second end connected to a second end of the first conductor. The third conductor has substantially the same first length. The third conductor has a first end connected to an antenna port and a second end connected to a ground potential.
    Type: Application
    Filed: August 11, 2009
    Publication date: December 10, 2009
    Applicant: Broadcom Corporation
    Inventors: Tom McKay, Vas Postoyalko, Edwin Li
  • Patent number: 7595704
    Abstract: A balun that includes a first conductor, a second conductor, and a third conductor. The first conductor has a first length. The first conductor also has a first end connected to a first balanced power amplifier output port. The second conductor has substantially the same first length. The second conductor also includes a first end connected to a second balanced power amplifier output port and a second end connected to a second end of the first conductor. The third conductor has substantially the same first length. The third conductor has a first end connected to an antenna port and a second end connected to a ground potential.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: September 29, 2009
    Assignee: Broadcom Corporation
    Inventors: Tom McKay, Vas Postoyalko, Edwin Li
  • Publication number: 20080174382
    Abstract: A balun that includes a first conductor, a second conductor, and a third conductor. The first conductor has a first length. The first conductor also has a first end connected to a first balanced power amplifier output port. The second conductor has substantially the same first length. The second conductor also includes a first end connected to a second balanced power amplifier output port and a second end connected to a second end of the first conductor. The third conductor has substantially the same first length. The third conductor has a first end connected to an antenna port and a second end connected to a ground potential.
    Type: Application
    Filed: March 21, 2008
    Publication date: July 24, 2008
    Applicant: Broadcom Corporation
    Inventors: Tom MacKay, Vas POSTOYALKO, Edwin LI
  • Patent number: 7385458
    Abstract: A balun that includes a first conductor, a second conductor and a third conductor. The first conductor has a first length. The first conductor also has a first end connected to a first balanced power amplifier output port. The second conductor has substantially the same first length. The second conductor also includes a first end connected to a second balanced power amplifier output port and a second end connected a second end of the first conductor. The third conductor has substantially the same first length. The third conductor has a first end connected to an antenna port and a second end connected to a ground potential.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: June 10, 2008
    Assignee: Broadcom Corporation
    Inventors: Tom McKay, Vas Postoyalko, Edwin Li
  • Publication number: 20070207746
    Abstract: A transceiver is described that includes a power amplifier (PA), a low noise amplifier (LNA), and an impedance matching circuit having a first and second differential output node. The first and second differential output nodes are coupled to outputs of the PA and to inputs of the LNA. The impedance matching circuit provides a load impedance to the outputs of the PA. The transceiver further includes a first impedance device having an output impedance coupled between the first and second differential output nodes. In this way, the combination of the output impedance and the load impedance matches with an impedance at the inputs of the LNA.
    Type: Application
    Filed: January 30, 2006
    Publication date: September 6, 2007
    Applicant: Broadcom Corporation
    Inventors: Carol Huang, Edwin Li
  • Patent number: 6982609
    Abstract: A balun that includes a first conductor, a second conductor and a third conductor. The first conductor has a length of about one quarter wavelength of a selected center frequency. The first conductor also has a first end connected to a first balanced power amplifier output port. The second conductor has a length of about one quarter wavelength of the selected center frequency. The second conductor also includes a first end connected to a second balanced power amplifier output port and a second end connected a second end of the first conductor. The third conductor has a length of about one quarter wavelength of the selected center frequency. The third conductor has a first end connected to an antenna port and a second end connected to a ground potential.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: January 3, 2006
    Assignee: Zeevo
    Inventors: Tom McKay, Vas Postoyalko, Edwin Li
  • Publication number: 20050200425
    Abstract: A balun that includes a first conductor, a second conductor and a third conductor. The first conductor has a first length. The first conductor also has a first end connected to a first balanced power amplifier output port. The second conductor has substantially the same first length. The second conductor also includes a first end connected to a second balanced power amplifier output port and a second end connected a second end of the first conductor. The third conductor has substantially the same first length. The third conductor has a first end connected to an antenna port and a second end connected to a ground potential.
    Type: Application
    Filed: April 29, 2005
    Publication date: September 15, 2005
    Applicant: ZEEVO
    Inventors: Tom McKay, Vas Postoyalko, Edwin Li
  • Patent number: D622940
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: September 7, 2010
    Inventors: Yin Shen, Edwin Li