Patents by Inventor Mohammad Nariman

Mohammad Nariman 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: 8145146
    Abstract: A radio frequency (RF) transmitter front-end includes a digital to analog conversion module and a power amplifier module. The digital to analog conversion module is coupled to convert amplitude information into analog amplitude adjust signals when a first mode is active and is coupled to convert power level information into analog power level signals when a second mode is active. The power amplifier module is coupled to amplify first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce first outbound RF signals when the first mode is active and is coupled to amplify second phase modulated RF signals in accordance with the analog power level signals to produce second outbound RF signals when the second mode is active.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: March 27, 2012
    Assignee: Broadcom Corporation
    Inventors: Mohammad Nariman, Alireza Zolfaghari, Hooman Darabi
  • Publication number: 20100240328
    Abstract: A radio frequency (RF) transmitter front-end includes a digital to analog conversion module and a power amplifier module. The digital to analog conversion module is coupled to convert amplitude information into analog amplitude adjust signals when a first mode is active and is coupled to convert power level information into analog power level signals when a second mode is active. The power amplifier module is coupled to amplify first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce first outbound RF signals when the first mode is active and is coupled to amplify second phase modulated RF signals in accordance with the analog power level signals to produce second outbound RF signals when the second mode is active.
    Type: Application
    Filed: May 28, 2010
    Publication date: September 23, 2010
    Applicant: BROADCOM CORPORATION
    Inventors: Mohammad NARIMAN, Alireza ZOLFAGHARI, Hooman DARABI
  • Patent number: 7737872
    Abstract: A digital to analog conversion (DAC) module includes a digital to analog converter, a sample and hold circuit, and a switch module. The digital to analog converter is coupled to convert a digital signal into an analog signal. The sample and hold circuit is coupled to sample the analog signal to produce a sampled analog signal. The switch module is coupled to provide the analog signal as an output of the DAC module when the DAC module in a first mode and to output the analog signal to the sample and hold circuit when the DAC module in a second mode, wherein the sampled analog signal provides the output of the DAC module in the second mode.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: June 15, 2010
    Assignee: Broadcom Corporation
    Inventors: Mohammad Nariman, Alireza Zolfaghari, Hooman Darabi
  • Patent number: 7734258
    Abstract: A radio frequency (RF) transmitter front-end includes a digital to analog conversion module and a power amplifier module. The digital to analog conversion module is coupled to convert amplitude information into analog amplitude adjust signals when a first mode is active and is coupled to convert power level information into analog power level signals when a second mode is active. The power amplifier module is coupled to amplify first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce first outbound RF signals when the first mode is active and is coupled to amplify second phase modulated RF signals in accordance with the analog power level signals to produce second outbound RF signals when the second mode is active.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: June 8, 2010
    Assignee: Broadcom Corporation
    Inventors: Mohammad Nariman, Alireza Zolfaghari, Hooman Darabi
  • Patent number: 7583941
    Abstract: A technique to adjust gain and DC level of current DAC signals with offset to generate a voltage signal that is used to control power level of a power amplifier. One or more current mirrors from a set of current mirrors is programmably selected to set gain of a current-to-voltage conversion stage. A second set of current mirrors used to adjust DC level current is oppositely tracked to the current mirrors used for the gain. The opposite tracking allows for deactivation (or activation) of respective current mirrors in the second set in response to activation (or deactivation) of respective gain setting current mirrors to maintain a substantially constant DC level when gain values are changed. An additional set of current mirrors allows for independent compensation of DC offsets.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: September 1, 2009
    Assignee: Broadcom Corporation
    Inventor: Mohammad Nariman
  • Patent number: 7463176
    Abstract: A digital to analog conversion (DAC) module includes a digital to analog converter, a sample and hold circuit, and a switch module. The digital to analog converter is coupled to convert a digital signal into an analog signal. The sample and hold circuit is coupled to sample the analog signal to produce a sampled analog signal. The switch module is coupled to provide the analog signal as an output of the DAC module when the DAC module in a first mode and to output the analog signal to the sample and hold circuit when the DAC module in a second mode, wherein the sampled analog signal provides the output of the DAC module in the second mode.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: December 9, 2008
    Assignee: Broadcom Corporation
    Inventors: Mohammad Nariman, Alireza Zolfaghari, Hooman Darabi
  • Publication number: 20080284629
    Abstract: A digital to analog conversion (DAC) module includes a digital to analog converter, a sample and hold circuit, and a switch module. The digital to analog converter is coupled to convert a digital signal into an analog signal. The sample and hold circuit is coupled to sample the analog signal to produce a sampled analog signal. The switch module is coupled to provide the analog signal as an output of the DAC module when the DAC module in a first mode and to output the analog signal to the sample and hold circuit when the DAC module in a second mode, wherein the sampled analog signal provides the output of the DAC module in the second mode.
    Type: Application
    Filed: June 20, 2008
    Publication date: November 20, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: MOHAMMAD NARIMAN, ALIREZA ZOLFAGHARI, HOOMAN DARABI
  • Publication number: 20080153439
    Abstract: A technique to adjust gain and DC level of current DAC signals with offset to generate a voltage signal that is used to control power level of a power amplifier. One or more current mirrors from a set of current mirrors is programmably selected to set gain of a current-to-voltage conversion stage. A second set of current mirrors used to adjust DC level current is oppositely tracked to the current mirrors used for the gain. The opposite tracking allows for deactivation (or activation) of respective current mirrors in the second set in response to activation (or deactivation) of respective gain setting current mirrors to maintain a substantially constant DC level when gain values are changed. An additional set of current mirrors allows for independent compensation of DC offsets.
    Type: Application
    Filed: December 20, 2006
    Publication date: June 26, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Mohammad Nariman
  • Publication number: 20080146173
    Abstract: A radio frequency (RF) transmitter front-end includes a digital to analog conversion module and a power amplifier module. The digital to analog conversion module is coupled to convert amplitude information into analog amplitude adjust signals when a first mode is active and is coupled to convert power level information into analog power level signals when a second mode is active. The power amplifier module is coupled to amplify first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce first outbound RF signals when the first mode is active and is coupled to amplify second phase modulated RF signals in accordance with the analog power level signals to produce second outbound RF signals when the second mode is active.
    Type: Application
    Filed: December 13, 2006
    Publication date: June 19, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Mohammad Nariman, Alireza Zolfaghari, Hooman Darabi
  • Publication number: 20080146170
    Abstract: A digital to analog conversion (DAC) module includes a digital to analog converter, a sample and hold circuit, and a switch module. The digital to analog converter is coupled to convert a digital signal into an analog signal. The sample and hold circuit is coupled to sample the analog signal to produce a sampled analog signal. The switch module is coupled to provide the analog signal as an output of the DAC module when the DAC module in a first mode and to output the analog signal to the sample and hold circuit when the DAC module in a second mode, wherein the sampled analog signal provides the output of the DAC module in the second mode.
    Type: Application
    Filed: December 13, 2006
    Publication date: June 19, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Mohammad Nariman, Alireza Zolfaghari, Hooman Darabi