Patents Assigned to Epic Communications, Inc.
  • Regulator and temperature compensation bias circuit for linearized power amplifier
    Patent number: 8593224
    Abstract: An improved regulator circuit, temperature compensation bias circuit, and amplifier circuit are disclosed.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: November 26, 2013
    Assignees: EpicCom, Inc., Epic Communications, Inc.
    Inventors: Cindy Yuen, Duc Chu, Kirk Laursen
  • Adaptive Antenna Module In Active IC Package
    Publication number: 20120208480
    Abstract: An antenna module embeds front end circuitry with an antenna. Adaptive matching circuitry external to the antenna module is electrically connected between the embedded front end circuitry and the embedded antenna.
    Type: Application
    Filed: February 10, 2012
    Publication date: August 16, 2012
    Applicants: Epic Communications, Inc., EpicCom. Inc.
    Inventors: Ching-Juang Peng, Wei-Hsuan Lee, Jin-Tsang Jean, Yi-Ching Pao
  • Regulator and temperature compensation bias circuit for linearized power amplifier
    Patent number: 8228122
    Abstract: An improved regulator circuit, temperature compensation bias circuit, and amplifier circuit are disclosed.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: July 24, 2012
    Assignees: EpicCom, Inc., Epic Communications, Inc.
    Inventors: Cindy Yuen, Duc Chu, Kirk Laursen
  • Smart linearized power amplifier and related systems and methods
    Patent number: 7863983
    Abstract: A power amplifier subsystem that includes a first stage amplifier and a second stage amplifier. A first bias circuit is coupled to the first stage amplifier, and the first bias circuit has a variable impedance that increases with radio frequency (RF) power. A second bias circuit is coupled to the second stage amplifier, and the second bias circuit has impedance relatively fixed with respect to radio frequency (RF) power. According to an embodiment of the invention, the first bias circuit comprises a transistor having a collector current that increases as radio frequency (RF) power increases. The second bias circuit can have a relatively fixed impedance. A method of designing an amplifier subsystem, where transistor size and resistor values are selected to obtain the desired bias and linearity characteristics, or transistor size and resistor values are selected to operate within a selected range, and amplifier performance is adjusted by changing the bias control voltage.
    Type: Grant
    Filed: May 19, 2004
    Date of Patent: January 4, 2011
    Assignee: Epic Communications, Inc.
    Inventors: Cindy Yuen, Kirk Laursen, Duc Chu
  • Smart linearized power amplifier and related systems and methods
    Publication number: 20090174475
    Abstract: A power amplifier subsystem that includes a first stage amplifier and a second stage amplifier. A first bias circuit is coupled to the first stage amplifier, and the first bias circuit has a variable impedance that increases with radio frequency (RF) power. A second bias circuit is coupled to the second stage amplifier, and the second bias circuit has impedance relatively fixed with respect to radio frequency (RF) power. According to an embodiment of the invention, the first bias circuit comprises a transistor having a collector current that increases as radio frequency (RF) power increases. The second bias circuit can have a relatively fixed impedance. A method of designing an amplifier subsystem, where transistor size and resistor values are selected to obtain the desired bias and linearity characteristics, or transistor size and resistor values are selected to operate within a selected range, and amplifier performance is adjusted by changing the bias control voltage.
    Type: Application
    Filed: May 19, 2004
    Publication date: July 9, 2009
    Applicant: Epic Communications, Inc.
    Inventors: Cindy Yuen, Kirk Laursen, Duc Chu