Patents by Inventor Hossein Mirzaie

Hossein Mirzaie 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).

  • Fully-differential operational amplifier system
    Patent number: 10320337
    Abstract: A dynamic common reference input (CMRI) signal may be provided to an operational amplifier, or “op-amp,” in an amplifier system to reduce the common mode ripple of the fully-differential op-amp, while adding little or no noise in the amplifier system. The dynamic CMRI signal may be controlled such that a common-mode component of two amplifier input nodes of the operational amplifier is made approximately independent of two input signals received at two system input nodes of the amplifier system. An amplifier system with the dynamic CMRI may be used in class-D amplifiers, such as amplifiers for audio systems that generate output for headphones or speakers.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: June 11, 2019
    Assignee: Cirrus Logic, Inc.
    Inventors: Xin Zhao, Tejasvi Das, Hossein Mirzaie, Lei Zhu, Xiaofan Fei
  • FULLY-DIFFERENTIAL OPERATIONAL AMPLIFIER SYSTEM
    Publication number: 20180062583
    Abstract: A dynamic common reference input (CMRI) signal may be provided to an operational amplifier, or “op-amp,” in an amplifier system to reduce the common mode ripple of the fully-differential op-amp, while adding little or no noise in the amplifier system. The dynamic CMRI signal may be controlled such that a common-mode component of two amplifier input nodes of the operational amplifier is made approximately independent of two input signals received at two system input nodes of the amplifier system. An amplifier system with the dynamic CMRI may be used in class-D amplifiers, such as amplifiers for audio systems that generate output for headphones or speakers.
    Type: Application
    Filed: January 27, 2017
    Publication date: March 1, 2018
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Xin Zhao, Tejasvi Das, Hossein Mirzaie, Lei Zhu, Xiaofan Fei