Patents by Inventor Dwayne Allen ROWLAND

Dwayne Allen ROWLAND 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: 9935588
    Abstract: Circuits, devices and methods related to multi-mode power amplifiers. A power amplifier (PA) assembly can include a radio-frequency (RF) amplification path having a first stage and a second stage, with each stage including a transistor. The PA assembly can further include a biasing circuit having a first bias path between a supply node and the base of a corresponding transistor. The PA assembly can further include a linearizing circuit implemented as either or both of a second bias path and a coupling path relative to the first bias path. The second bias path can be configured to provide an additional base bias current to the base under a selected condition. The coupling path can be configured to improve linearity of the corresponding transistor operating in a first mode while allowing a ballast resistance to be sufficiently robust for the corresponding transistor operating in a second mode.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: April 3, 2018
    Assignee: Skyworks Solutions, Inc.
    Inventors: Jianxing Ni, Michael Lynn Gerard, Ramanan Bairavasubramanian, Dwayne Allen Rowland, Matthew Lee Banowetz
  • Publication number: 20170294880
    Abstract: Bias circuit for radio-frequency amplifier. In some embodiments, an amplifier circuit for radio-frequency applications can includes an amplifying transistor having an input. The amplifier circuit can further include a bias circuit having a first bias path implemented between a supply node and the input to provide a bias signal to the input of the amplifying transistor, and a second bias path implemented between the supply node and the input to provide an additional bias signal to the input of the amplifying transistor under a selected condition. The first bias path can include a first transistor configured to facilitate the bias signal provided to the input of the amplifying transistor, and the second bias path can include a second transistor configured to facilitate the additional bias signal provided to the input of the amplifying transistor.
    Type: Application
    Filed: April 25, 2017
    Publication date: October 12, 2017
    Inventors: Michael Lynn GERARD, Ramanan BAIRAVASUBRAMANIAN, Dwayne Allen ROWLAND, Matthew Lee BANOWETZ
  • Publication number: 20170133987
    Abstract: Circuits, devices and methods related to multi-mode power amplifiers. A power amplifier (PA) assembly can include a radio-frequency (RF) amplification path having a first stage and a second stage, with each stage including a transistor. The PA assembly can further include a biasing circuit having a first bias path between a supply node and the base of a corresponding transistor. The PA assembly can further include a linearizing circuit implemented as either or both of a second bias path and a coupling path relative to the first bias path. The second bias path can be configured to provide an additional base bias current to the base under a selected condition. The coupling path can be configured to improve linearity of the corresponding transistor operating in a first mode while allowing a ballast resistance to be sufficiently robust for the corresponding transistor operating in a second mode.
    Type: Application
    Filed: October 17, 2016
    Publication date: May 11, 2017
    Inventors: Jianxing NI, Michael Lynn GERARD, Ramanan BAIRAVASUBRAMANIAN, Dwayne Allen ROWLAND, Matthew Lee BANOWETZ
  • Patent number: 9634619
    Abstract: Improved power amplifier (PA) bias circuit having parallel emitter follower. In some embodiments, a bias circuit for a PA can include a first bias path implemented to couple a base node of an amplifying transistor and a supply node, with the first bias path being configured to provide a base bias current to the base node. The PA can further include a second bias path implemented to be electrically parallel with the first bias path between the base node and the supply node. The second bias path can be configured to provide an additional base bias current to the base node under a selected condition.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: April 25, 2017
    Assignee: Skyworks Solutions, Inc.
    Inventors: Michael Lynn Gerard, Ramanan Bairavasubramanian, Dwayne Allen Rowland, Matthew Lee Banowetz
  • Patent number: 9473076
    Abstract: Improved linearity performance for multi-mode power amplifiers. A power amplifier (PA) assembly can include a radio-frequency (RF) amplification path having a first stage and a second stage, with each stage including a transistor. The PA assembly can further include a biasing circuit having a first bias path between a supply node and the base of a corresponding transistor. The PA assembly can further include a linearizing circuit implemented as either or both of a second bias path and a coupling path relative to the first bias path. The second bias path can be configured to provide an additional base bias current to the base under a selected condition. The coupling path can be configured to improve linearity of the corresponding transistor operating in a first mode while allowing a ballast resistance to be sufficiently robust for the corresponding transistor operating in a second mode.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: October 18, 2016
    Assignee: Skyworks Solutions, Inc.
    Inventors: Jianxing Ni, Michael Lynn Gerard, Ramanan Bairavasubramanian, Dwayne Allen Rowland, Matthew Lee Banowetz
  • Publication number: 20150349715
    Abstract: Improved power amplifier (PA) bias circuit having parallel emitter follower. In some embodiments, a bias circuit for a PA can include a first bias path implemented to couple a base node of an amplifying transistor and a supply node, with the first bias path being configured to provide a base bias current to the base node. The PA can further include a second bias path implemented to be electrically parallel with the first bias path between the base node and the supply node. The second bias path can be configured to provide an additional base bias current to the base node under a selected condition.
    Type: Application
    Filed: November 3, 2014
    Publication date: December 3, 2015
    Inventors: Michael Lynn GERARD, Ramanan BAIRAVASUBRAMANIAN, Dwayne Allen ROWLAND, Matthew Lee BANOWETZ
  • Publication number: 20150171797
    Abstract: Improved linearity performance for multi-mode power amplifiers. A power amplifier (PA) assembly can include a radio-frequency (RF) amplification path having a first stage and a second stage, with each stage including a transistor. The PA assembly can further include a biasing circuit having a first bias path between a supply node and the base of a corresponding transistor. The PA assembly can further include a linearizing circuit implemented as either or both of a second bias path and a coupling path relative to the first bias path. The second bias path can be configured to provide an additional base bias current to the base under a selected condition. The coupling path can be configured to improve linearity of the corresponding transistor operating in a first mode while allowing a ballast resistance to be sufficiently robust for the corresponding transistor operating in a second mode.
    Type: Application
    Filed: November 6, 2014
    Publication date: June 18, 2015
    Inventors: Jianxing NI, Michael Lynn GERARD, Ramanan BAIRAVASUBRAMANIAN, Dwayne Allen ROWLAND, Matthew Lee BANOWETZ