Patents by Inventor Stephen J. Rector

Stephen J. Rector 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: 8489044
    Abstract: In accordance with some embodiments of the present disclosure, a method may include generating a first current equal to a bandgap voltage divided by a resistance selected to approximately match a process resistance integral to a receiver. The method may further include generating a second current equal to temperature-dependent current multiplied by a predetermined scaling factor. The method may also include subtracting the second current from the first current to generate a bias current. The method may additionally include providing the bias current to the receiver.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: July 16, 2013
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Omid Oliaei, Stephen J. Rector, Cristiano Benevento
  • Publication number: 20130039394
    Abstract: In accordance with some embodiments of the present disclosure, a method may include generating a first current equal to a bandgap voltage divided by a resistance selected to approximately match a process resistance integral to a receiver. The method may further include generating a second current equal to temperature-dependent current multiplied by a predetermined scaling factor. The method may also include subtracting the second current from the first current to generate a bias current. The method may additionally include providing the bias current to the receiver.
    Type: Application
    Filed: August 11, 2011
    Publication date: February 14, 2013
    Applicant: Fujitsu Semiconductor Limited
    Inventors: Omid Oliaei, Stephen J. Rector, Cristiano Benevento
  • Patent number: 7403758
    Abstract: Method and apparatus are provided for linearized balanced signal mixing. A signal mixing circuit (10) for translating a radio frequency (RF) signal is provided comprising an input amplifier (12), a mixer network (14), and an output buffer amplifier (18). The input amplifier (12) is configured to produce an amplified RF signal and cancel an input third-order intermodulation (IM3) distortion in the amplified RF signal with a cross-coupled feedback amplifier (13). The mixer network (14) is configured to produce an intermediate frequency (IF) signal based on the amplified RF signal and a local oscillator signal. The output amplifier (18) is configured to buffer the IF signal and cancel an output IM3 distortion in the IF signal with a cross-coupled feedback amplifier (19). The input amplifier (12) and cross-coupled feedback amplifier (13) also serve as a bias current source for the mixer network (14), thus lowering the supply voltage required for the mixing circuit (10).
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: July 22, 2008
    Assignee: Freescale Semicondutor, Inc.
    Inventor: Stephen J. Rector