Patents by Inventor Mohammad Ahsanul Adeeb

Mohammad Ahsanul Adeeb 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).

  • Publication number: 20240007054
    Abstract: A progressive envelope tracking (ET) with delay compensation includes an ET integrated circuit (IC) (ETIC) that is a progressive ETIC that switches between different driver amplifiers having different associated offset voltages based on a tracking signal (e.g., Vramp) from a baseband transceiver. To make sure that desired changes to the offset voltage occur contemporaneously with an input signal for the driver amplifiers, a delay may be added to the input signal for the driver amplifiers. By adding and controlling this delay to the input to the driver amplifiers, the changes to the offset voltage will track the changes to the input signal at the driver amplifiers and overall efficiency of the ETIC may be improved.
    Type: Application
    Filed: September 23, 2021
    Publication date: January 4, 2024
    Inventors: Nadim Khlat, Mohammad Ahsanul Adeeb
  • Patent number: 10090762
    Abstract: A direct current (DC) voltage converter configured to transition between operation modes is disclosed. A voltage selection circuitry is provided in a DC voltage conversion circuit to control a buck-boost converter that generates a DC output voltage. As opposed to conventional methods of switching the buck-boost converter between a buck mode and a boost mode based on a single switching threshold, the voltage selection circuitry is configured to switch the buck-boost converter between the buck mode and the boost mode based on multiple voltage thresholds. Each of the multiple voltage thresholds defines a respective range for the DC output voltage. By controlling the buck-boost converter based on multiple voltage thresholds, it is possible to provide a smoother transition between the buck mode and the boost mode, thus reducing voltage errors in the DC output voltage and improving reliability of the DC voltage conversion circuit.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: October 2, 2018
    Assignee: Qorvo US, Inc.
    Inventors: Mohammad Ahsanul Adeeb, Philippe Gorisse, Nadim Khlat, Michael R. Kay
  • Publication number: 20160056705
    Abstract: A direct current (DC) voltage converter configured to transition between operation modes is disclosed. A voltage selection circuitry is provided in a DC voltage conversion circuit to control a buck-boost converter that generates a DC output voltage. As opposed to conventional methods of switching the buck-boost converter between a buck mode and a boost mode based on a single switching threshold, the voltage selection circuitry is configured to switch the buck-boost converter between the buck mode and the boost mode based on multiple voltage thresholds. Each of the multiple voltage thresholds defines a respective range for the DC output voltage. By controlling the buck-boost converter based on multiple voltage thresholds, it is possible to provide a smoother transition between the buck mode and the boost mode, thus reducing voltage errors in the DC output voltage and improving reliability of the DC voltage conversion circuit.
    Type: Application
    Filed: August 20, 2015
    Publication date: February 25, 2016
    Inventors: Mohammad Ahsanul Adeeb, Philippe Gorisse, Nadim Khlat, Michael R. Kay
  • Patent number: 9207692
    Abstract: An envelope tracking power supply and an offset capacitive element are disclosed. The offset capacitive element is coupled between a switching output and an analog output of the envelope tracking power supply, which operates in one of an envelope tracking mode, a transition mode, and an average power tracking mode. During the envelope tracking mode, the envelope tracking power supply provides an envelope power supply signal using both the switching output and the analog output. During the transition mode, the envelope tracking power supply drives a voltage across the offset capacitive element from a first voltage to a second voltage, such that during a transition from the envelope tracking mode to the transition mode, the offset capacitive element has the first voltage, and during a transition from the transition mode to the average power tracking mode, the offset capacitive element has the second voltage.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: December 8, 2015
    Assignee: RF Micro Devices, Inc.
    Inventors: Nadim Khlat, Michael R. Kay, Mohammad Ahsanul Adeeb
  • Patent number: 8933685
    Abstract: A protection system and method for protecting a direct current to direct current voltage converter (DC-DC converter) from a potentially damaging excessive output current due to exposure to a relatively strong magnetic field is disclosed. The system includes a detector circuit configured to monitor a signal characteristic of the DC-DC converter, and a linear regulator having an output coupled to the load output of the DC-DC converter. The system further includes a control system configured to disable a load output of the DC-DC converter and enable the output of the linear regulator when the detector detects that the signal characteristic has moved outside a predetermined threshold range. Moreover, the control system is further configured to disable the output of the linear regulator after a predetermined time period, and enable the load output of the DC-DC converter after the predetermined time period.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: January 13, 2015
    Assignee: RF Micro Devices, Inc.
    Inventors: Mohammad Ahsanul Adeeb, John Endredy, Christopher Truong Ngo, Ashraf Rozek
  • Publication number: 20140111178
    Abstract: An envelope tracking power supply and an offset capacitive element are disclosed. The offset capacitive element is coupled between a switching output and an analog output of the envelope tracking power supply, which operates in one of an envelope tracking mode, a transition mode, and an average power tracking mode. During the envelope tracking mode, the envelope tracking power supply provides an envelope power supply signal using both the switching output and the analog output. During the transition mode, the envelope tracking power supply drives a voltage across the offset capacitive element from a first voltage to a second voltage, such that during a transition from the envelope tracking mode to the transition mode, the offset capacitive element has the first voltage, and during a transition from the transition mode to the average power tracking mode, the offset capacitive element has the second voltage.
    Type: Application
    Filed: October 17, 2013
    Publication date: April 24, 2014
    Applicant: RF Micro Devices, Inc.
    Inventors: Nadim Khlat, Michael R. Kay, Mohammad Ahsanul Adeeb
  • Publication number: 20120242308
    Abstract: A protection system and method for protecting a direct current to direct current voltage converter (DC-DC converter) from a potentially damaging excessive output current due to exposure to a relatively strong magnetic field is disclosed. The system includes a detector circuit configured to monitor a signal characteristic of the DC-DC converter, and a linear regulator having an output coupled to the load output of the DC-DC converter. The system further includes a control system configured to disable a load output of the DC-DC converter and enable the output of the linear regulator when the detector detects that the signal characteristic has moved outside a predetermined threshold range. Moreover, the control system is further configured to disable the output of the linear regulator after a predetermined time period, and enable the load output of the DC-DC converter after the predetermined time period.
    Type: Application
    Filed: March 22, 2012
    Publication date: September 27, 2012
    Applicant: RF MICRO DEVICES, INC.
    Inventors: Mohammad Ahsanul Adeeb, John Endredy, Christopher Truong Ngo, Ashraf Rozek