Patents by Inventor Darioush Agahi

Darioush Agahi 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: 8983411
    Abstract: A method to control adjustable power levels uses a network of attenuators that includes a fixed attenuation and a variable attenuation. The method adjusts the variable attenuation to approach the fixed attenuation, provides gain to an attenuated signal in an amount proximate to the fixed attenuation to generate a compensated signal, and compares power levels of a non-attenuated signal and the compensated signal to generate a first error signal. The method introduces the fixed attenuation and correspondingly reduces the variable attenuation to maintain a combined attenuation. The combined attenuation generates a modified compensated signal. The method measures a difference between the first power levels of the non-attenuated signal and the modified compensated signal to generate a second error signal, and generates a control signal as function of the first and second error signals to adjust the variable attenuation to reduce an attenuation mismatch introduced between the fixed and variable attenuations.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: March 17, 2015
    Assignee: Skyworks Solutions, Inc.
    Inventors: Dmitriy Rozenblit, Darioush Agahi
  • Publication number: 20140243049
    Abstract: A method to control adjustable power levels uses a network of attenuators that includes a fixed attenuation and a variable attenuation. The method adjusts the variable attenuation to approach the fixed attenuation, provides gain to an attenuated signal in an amount proximate to the fixed attenuation to generate a compensated signal, and compares power levels of a non-attenuated signal and the compensated signal to generate a first error signal. The method introduces the fixed attenuation and correspondingly reduces the variable attenuation to maintain a combined attenuation. The combined attenuation generates a modified compensated signal. The method measures a difference between the first power levels of the non-attenuated signal and the modified compensated signal to generate a second error signal, and generates a control signal as function of the first and second error signals to adjust the variable attenuation to reduce an attenuation mismatch introduced between the fixed and variable attenuations.
    Type: Application
    Filed: May 6, 2014
    Publication date: August 28, 2014
    Applicant: Skyworks Solutions, Inc.
    Inventors: Dmitriy Rozenblit, Darioush Agahi
  • Patent number: 8737941
    Abstract: A system, such as a transceiver, for controlling an adjustable power level includes first and second power detectors, a network of attenuators, a compensator, a comparator, and a controller. The first power detector measures the power of a signal. The network of attenuators receives the signal and generates an attenuated signal. The compensator receives the attenuated signal and generates a compensated signal. The second power detector measures the power of the compensated signal. The comparator receives the respective outputs from the first and second power detectors and generates a first error signal. The controller enables the fixed attenuation, correspondingly adjusts the variable attenuation, receives a second error signal, and provides a control signal to the network of attenuators to nullify an attenuation mismatch introduced between the fixed attenuation and the variable attenuation. A corresponding method for controlling an adjustable power level is also disclosed.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: May 27, 2014
    Assignee: Skyworks Solutions, Inc.
    Inventors: Dmitriy Rozenblit, Darioush Agahi
  • Patent number: 8655291
    Abstract: A method for controlling an output of a power amplifier of a portable communication device includes determining a power level of a signal received at the portable communication device, generating a receive reference signal (RXLEV) that is indicative of the power level of the signal received at the portable communication device, and determining whether the receive reference signal is within a threshold value window. When the receive reference signal is within the threshold value window a nominal power output of a power amplifier in the portable communication device is transmitted during a random access channel signal transmission. When the receive reference signal is below the threshold value, a power output of the power amplifier in the portable communication device is increased during the random access channel signal transmission.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: February 18, 2014
    Assignee: Skyworks Solutions, Inc.
    Inventors: Darioush Agahi, Arumugam Govindswamy
  • Patent number: 8433361
    Abstract: A digital modulator for a portable handset using 8PSK or EDGE modulation with a direct launch transmitter is used to controllably adjust the transmit power of the portable handset. The digital modulator includes a controller coupled between a memory and an accumulator. The controller is responsive to an indication that the transmit power should be transitioned. The controller temporarily alters the data transferred from the memory to the accumulator during transitions of the transmit power level.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: April 30, 2013
    Assignee: Intel Corporation
    Inventors: Masoud Kahirzi, John E Vasa, Darioush Agahi
  • Publication number: 20120250786
    Abstract: A digital modulator for a portable handset using 8PSK or EDGE modulation with a direct launch transmitter is used to controllably adjust the transmit power of the portable handset. The digital modulator includes a controller coupled between a memory and an accumulator. The controller is responsive to an indication that the transmit power should be transitioned. The controller temporarily alters the data transferred from the memory to the accumulator during transitions of the transmit power level.
    Type: Application
    Filed: June 11, 2012
    Publication date: October 4, 2012
    Inventors: Masoud Kahrizi, John E. Vasa, Darioush Agahi
  • Patent number: 8208877
    Abstract: A digital modulator for a portable handset using 8PSK or EDGE modulation with a direct launch transmitter is used to controllably adjust the transmit power of the portable handset. The digital modulator includes a controller coupled between a memory and an accumulator. The controller is responsive to an indication that the transmit power should be transitioned. The controller temporarily alters the data transferred from the memory to the accumulator during transitions of the transmit power level.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: June 26, 2012
    Assignee: Intel Corporation
    Inventors: Masoud Kahrizi, John E. Vasa, Darioush Agahi
  • Publication number: 20120020294
    Abstract: A method for controlling an output of a power amplifier of a portable communication device includes determining a power level of a signal received at the portable communication device, generating a receive reference signal (RXLEV) that is indicative of the power level of the signal received at the portable communication device, and determining whether the receive reference signal is within a threshold value window. When the receive reference signal is within the threshold value window a nominal power output of a power amplifier in the portable communication device is transmitted during a random access channel signal transmission. When the receive reference signal is below the threshold value, a power output of the power amplifier in the portable communication device is increased during the random access channel signal transmission.
    Type: Application
    Filed: June 27, 2011
    Publication date: January 26, 2012
    Applicant: SKYWORKS SOLUTIONS, INC.
    Inventors: Darioush Agahi, Arumugam Govindswamy
  • Patent number: 7970427
    Abstract: A method for controlling an output of a power amplifier of a portable communication device includes determining a power level of a signal received at the portable communication device, generating a receive reference signal (RXLEV) that is indicative of the power level of the signal received at the portable communication device, and determining whether the receive reference signal is within a threshold value window. When the receive reference signal is within the threshold value window a nominal power output of a power amplifier in the portable communication device is transmitted during a random access channel signal transmission. When the receive reference signal is below the threshold value, a power output of the power amplifier in the portable communication device is increased during the random access channel signal transmission.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: June 28, 2011
    Assignee: Skyworks Solutions, Inc.
    Inventors: Darioush Agahi, Arumugam Govindswamy
  • Patent number: 7920836
    Abstract: A system for saturation detection, correction and recovery in a power amplifier includes a power amplifier, a closed power control loop configured to develop a power control signal (VPC), and power control circuitry configured to reduce the power control signal if the power amplifier is operating in a saturation mode.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: April 5, 2011
    Assignee: Skyworks Solutions, Inc.
    Inventors: Dmitriy Rozenblit, Tirdad Sowlati, Darioush Agahi
  • Patent number: 7764055
    Abstract: A supply voltage controlled power amplifier includes a power amplifier, a closed power control loop configured to generate a power control signal, and a voltage regulator coupled to the power control loop, the voltage regulator including a first regulator stage, a second regulator stage, and a peak detector, wherein an output of the second regulator stage is applied as a feedback signal to the first regulator stage and wherein an output of the first regulator stage is decreased to a level consistent with an output of the power amplifier and an additional operating buffer amount.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: July 27, 2010
    Assignee: Skyworks Solutions, Inc.
    Inventors: Dmitriy Rozenblit, Tirdad Sowlati, Morten Damgaard, Darioush Agahi
  • Publication number: 20100159848
    Abstract: A system for saturation detection, correction and recovery in a power amplifier includes a power amplifier, a closed power control loop configured to develop a power control signal (VPC), and power control circuitry configured to reduce the power control signal if the power amplifier is operating in a saturation mode.
    Type: Application
    Filed: March 2, 2010
    Publication date: June 24, 2010
    Inventors: Dmitriy Rozenblit, Tirdad Sowlati, Darioush Agahi
  • Patent number: 7706760
    Abstract: A system for saturation detection, correction and recovery in a power amplifier includes a power amplifier, a closed power control loop configured to develop a power control signal (VPC), and power control circuitry configured to reduce the power control signal if the power amplifier is operating in a saturation mode.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: April 27, 2010
    Assignee: Skyworks Solutions, Inc.
    Inventors: Dmitriy Rozenblit, Tirdad Sowlati, Darioush Agahi
  • Publication number: 20090087825
    Abstract: The present invention provides a system and method for assisting a user to pray. The method includes calculating a direction from the present position to a reference position; displaying the direction on a user interface; calculating an away distance between a home position and the present position, wherein the home position is defined by a user; generating praying instruction based on the away distance; and presenting the generated praying instruction via the user interface.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 2, 2009
    Inventors: ARUMUGAM GOVINDSWAMY, Darioush Agahi
  • Patent number: 7502625
    Abstract: A multi-band communication device configured with a mobile communication device for voice or data communication over a cellular, satellite or other communication network and configured with an auxiliary communication system configured to receive and/or transmit an auxiliary communication signal. The mobile communication device and auxiliary communication system are integrated into the same components within the multi-band communication device thereby allowing the components to share the processing tasks associated with each communication device within the multi-band communication device. The auxiliary communication device may be configured to operate during standby mode of the mobile communication device, such as during reception of a paging signal. The auxiliary communication device may comprise, but is not limited to, AM or FM radio, personal communication devices such as FRS, GMRS, or weather band radio.
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: March 10, 2009
    Assignee: Skyworks Solutions, Inc.
    Inventors: Norman J. Beamish, Darioush Agahi, Balasubramanian Ramachandran
  • Publication number: 20080233885
    Abstract: A method for controlling an output of a power amplifier of a portable communication device includes determining a power level of a signal received at the portable communication device, generating a receive reference signal (RXLEV) that is indicative of the power level of the signal received at the portable communication device, and determining whether the receive reference signal is within a threshold value window. When the receive reference signal is within the threshold value window a nominal power output of a power amplifier in the portable communication device is transmitted during a random access channel signal transmission. When the receive reference signal is below the threshold value, a power output of the power amplifier in the portable communication device is increased during the random access channel signal transmission.
    Type: Application
    Filed: March 4, 2008
    Publication date: September 25, 2008
    Inventors: Darioush Agahi, Arumugam Govindswamy
  • Publication number: 20080233994
    Abstract: A digital modulator for a portable handset using 8PSK or EDGE modulation with a direct launch transmitter is used to controllably adjust the transmit power of the portable handset. The digital modulator includes a controller coupled between a memory and an accumulator. The controller is responsive to an indication that the transmit power should be transitioned. The controller temporarily alters the data transferred from the memory to the accumulator during transitions of the transmit power level.
    Type: Application
    Filed: March 20, 2008
    Publication date: September 25, 2008
    Applicant: SKYWORKS SOLUTIONS, INC.
    Inventors: Masoud Kahrizi, John E. Vasa, Darioush Agahi
  • Publication number: 20080009248
    Abstract: A supply voltage controlled power amplifier includes a power amplifier, a closed power control loop configured to generate a power control signal, and a voltage regulator coupled to the power control loop, the voltage regulator including a first regulator stage, a second regulator stage, and a peak detector, wherein an output of the second regulator stage is applied as a feedback signal to the first regulator stage and wherein an output of the first regulator stage is decreased to a level consistent with an output of the power amplifier and an additional operating buffer amount.
    Type: Application
    Filed: July 10, 2006
    Publication date: January 10, 2008
    Inventors: Dmitriy Rozenblit, Tirdad Sowlati, Morten Damgaard, Darioush Agahi
  • Publication number: 20070264946
    Abstract: A system for saturation detection, correction and recovery in a power amplifier includes a power amplifier, a closed power control loop configured to develop a power control signal (VPC), and power control circuitry configured to reduce the power control signal if the power amplifier is operating in a saturation mode.
    Type: Application
    Filed: May 10, 2006
    Publication date: November 15, 2007
    Inventors: Dmitriy Rozenblit, Tirdad Sowlati, Darioush Agahi
  • Publication number: 20070264947
    Abstract: A system for saturation detection and compensation in a power amplifier includes a power amplifier, a closed power control loop configured to develop a power control signal (VPC), a comparator configured to receive the power control signal and a reference signal, the comparator also configured to determine whether the power amplifier is operating in a saturation mode, and power control circuitry configured to reduce the power control signal if the power amplifier is operating in a saturation mode.
    Type: Application
    Filed: May 10, 2006
    Publication date: November 15, 2007
    Inventors: Dmitriy Rozenblit, Tirdad Sowlati, Darioush Agahi, Morten Damgaard