Patents by Inventor Imran Bashir

Imran Bashir 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: 10594336
    Abstract: A novel and useful time mode analog to digital converter (ADC) that employs injection locking to overcome the nonlinearities of the voltage controlled oscillator (VCO). The oscillator's frequency is modulated using injection locking rather than varying its supply voltage. The oscillator is injection locked with a vector modulated signal, the frequency of which is derived from the oscillator itself. The output of the oscillator is modulated by the input voltage Vin(t). The output of the modulator is at the same frequency as the oscillator with an envelope (i.e. amplitude) determined by Vin(t). This signal is injected back into the oscillator at one or more points. The frequency of the oscillator ?out(t) changes in order to satisfy the Barkhausen criteria for oscillation. Alternatively, each stage of a ring oscillator (RO) incorporates its own mixer (i.e.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: March 17, 2020
    Assignee: University College Dublin
    Inventors: Imran Bashir, Robert B. Staszewski, Filippo Schembari
  • Publication number: 20190280709
    Abstract: A novel and useful time mode analog to digital converter (ADC) that employs injection locking to overcome the non-linearities of the voltage controlled oscillator (VCO). The oscillator's frequency is modulated using injection locking rather than varying its supply voltage. The oscillator is injection locked with a vector modulated signal, the frequency of which is derived from the oscillator itself. The output of the oscillator is modulated by the input voltage Vin(t). The output of the modulator is at the same frequency as the oscillator with an envelope (i.e. amplitude) determined by Vin(t). This signal is injected back into the oscillator at one or more points. The frequency of the oscillator ?out(t) changes in order to satisfy the Barkhausen criteria for oscillation. Alternatively, each stage of a ring oscillator (RO) incorporates its own mixer (i.e.
    Type: Application
    Filed: October 6, 2016
    Publication date: September 12, 2019
    Applicant: University College Dublin
    Inventors: Imran Bashir, Robert B. Staszewski, Filippo Schembari
  • Patent number: 10008980
    Abstract: A novel and useful digitally controlled injection-locked RF oscillator with an auxiliary loop. The oscillator is injection locked to a time delayed version of its own resonating voltage (or its second harmonic) and its frequency is modulated by manipulating the phase and amplitude of injected current. The oscillator achieves a narrow modulation tuning range and fine step size of an LC tank based digitally controlled oscillator (DCO). The DCO first gets tuned to its center frequency by means of a conventional switched capacitor array. Frequency modulation is then achieved via a novel method of digitally controlling the phase and amplitude of injected current into the LC tank generated from its own resonating voltage. A very linear deviation from the center frequency is achieved with a much lower gain resulting in a very fine resolution DCO step size and high linearity without needing to resort to oversampled noise shaped dithering.
    Type: Grant
    Filed: October 3, 2015
    Date of Patent: June 26, 2018
    Assignee: Short Circuit Technologies LLC
    Inventors: Imran Bashir, Robert Bogdan Staszewski
  • Publication number: 20160099720
    Abstract: A novel and useful digitally controlled injection-locked RF oscillator with an auxiliary loop. The oscillator is injection locked to a time delayed version of its own resonating voltage (or its second harmonic) and its frequency is modulated by manipulating the phase and amplitude of injected current. The oscillator achieves a narrow modulation tuning range and fine step size of an LC tank based digitally controlled oscillator (DCO). The DCO first gets tuned to its center frequency by means of a conventional switched capacitor array. Frequency modulation is then achieved via a novel method of digitally controlling the phase and amplitude of injected current into the LC tank generated from its own resonating voltage. A very linear deviation from the center frequency is achieved with a much lower gain resulting in a very fine resolution DCO step size and high linearity without needing to resort to oversampled noise shaped dithering.
    Type: Application
    Filed: October 3, 2015
    Publication date: April 7, 2016
    Inventors: Imran Bashir, Robert Bogdan Staszewski
  • Patent number: 8463189
    Abstract: A novel and useful apparatus for and method of predistortion calibration and built-in self testing (BIST) of a nonlinear digitally-controlled radio frequency (RF) power amplifier (DPA) using subharmonic mixing. The RF power amplifier output is temporarily coupled into the frequency reference (FREF) input and the phase error samples generated in the phase locked loop (PLL) are then observed and analyzed. The digital predistortion and BIST mechanisms process the phase error samples to calibrate and test the DPA in the transmitter of the Digital RF Processor (DRP). The invention enables the characterization of nonlinearities, the configuration of internal predistortion, as well as the testing of the transmitter's analogRF circuitry, thereby eliminating commonly employed RF performance testing using high-cost test equipment and associated extended test times.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: June 11, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Imran Bashir, Robert B. Staszewski, Oren E. Eliezer
  • Publication number: 20120252382
    Abstract: A novel and useful apparatus for and method of predistortion calibration and built-in self testing (BIST) of a nonlinear digitally-controlled radio frequency (RF) power amplifier (DPA) using subharmonic mixing. The RF power amplifier output is temporarily coupled into the frequency reference (FREF) input and the phase error samples generated in the phase locked loop (PLL) are then observed and analyzed. The digital predistortion and BIST mechanisms process the phase error samples to calibrate and test the DPA in the transmitter of the Digital RF Processor (DRP). The invention enables the characterization of nonlinearities, the configuration of internal predistortion, as well as the testing of the transmitter's analog/RF circuitry, thereby eliminating commonly employed RF performance testing using high-cost test equipment and associated extended test times.
    Type: Application
    Filed: July 31, 2007
    Publication date: October 4, 2012
    Inventors: Imran Bashir, Robert B. Staszewski, Oren E. Eliezer
  • Patent number: 8126401
    Abstract: An embodiment of the present invention provides transmitter having a phase locked loop that has a dynamically controllable loop bandwidth. A transmit modulator is coupled to the PLL for performing vector modulation in response to transmission symbols. Each transmission symbol comprises an amplitude signal and a phase signal. A controller is coupled to the PLL and to the transmit modulator and is operable to detect when a criteria of the transmission symbols crosses a threshold and to adjust loop bandwidth in response to crossing the threshold. The criteria of the transmission symbols may be a function of the amplitude signal or a function of the phase signal, and may be the amplitude signal, a first derivative of the amplitude signal, a second derivative of the amplitude signal, a square of the amplitude signal, a derivative of the amplitude signal squared, the phase signal, or a derivative of the phase signal.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: February 28, 2012
    Assignee: Texas Instruments Incorporated
    Inventors: Robert Bogdan Staszewski, Khurram Waheed, Sudheer K. Vemulapalli, Manouchehr Entezari, Imran Bashir
  • Publication number: 20100283665
    Abstract: A digitally controlled mechanism for the minimization of the self-interference caused by an amplitude modulated signal generated within a polar transmitter to the oscillator circuit, where the carrier of that transmitter is created. A digitally controlled delay between the circuit where the signal is generated and the circuit where it is amplitude-modulated allows adjustment of the delay or phase-shift between the aggressing and victim signals. The optimal delay that is to be introduced in the path is determined, and a corresponding control word is generated to arrive at the selected delay/phase-shift.
    Type: Application
    Filed: May 5, 2009
    Publication date: November 11, 2010
    Inventors: Imran Bashir, Robert Bogdan Staszewski, Oren Eliezer, Meng-Chang Lee
  • Publication number: 20090325494
    Abstract: An embodiment of the present invention provides transmitter having a phase locked loop that has a dynamically controllable loop bandwidth. A transmit modulator is coupled to the PLL for performing vector modulation in response to transmission symbols. Each transmission symbol comprises an amplitude signal and a phase signal. A controller is coupled to the PLL and to the transmit modulator and is operable to detect when a criteria of the transmission symbols crosses a threshold and to adjust loop bandwidth in response to crossing the threshold. The criteria of the transmission symbols may be a function of the amplitude signal or a function of the phase signal, and may be the amplitude signal, a first derivative of the amplitude signal, a second derivative of the amplitude signal, a square of the amplitude signal, a derivative of the amplitude signal squared, the phase signal, or a derivative of the phase signal.
    Type: Application
    Filed: March 27, 2009
    Publication date: December 31, 2009
    Inventors: Robert Bogdan Staszewski, Khurram Waheed, Sudheer K. Vemulapalli, Manouchehr Entezari, Imran Bashir
  • Patent number: 7210098
    Abstract: A system and method for interacting with content, such as web-based markup content, using visual and voice browsers. A first browser facilitates communication in a first mode (e.g., an HTML browser that facilitates visual/tactile interaction with HTML content), and a second browser facilitates communication in a second mode (e.g., a VXML browser that facilitates audio interaction with VXML content). HTML and VXML content is created that: (1) indicates a correspondence between HTML and VXML pages that represent the same underlying content; and (2) contains specialized tags that indicate information to be send from one browser to the other to synchronize each browser to equivalent parts of the content. The HTML browser is adapted to use relative links as signals that information is to be sent to the VXML browser, and the platform on which the VXML browser runs is adapted to recognize a “hit” on its own port 80 as a signal that information is to be sent to the HTML browser.
    Type: Grant
    Filed: February 18, 2003
    Date of Patent: April 24, 2007
    Assignee: Kirusa, Inc.
    Inventors: Sandeep Sibal, Imran Bashir
  • Publication number: 20030182622
    Abstract: A system and method for interacting with content, such as web-based markup content, using visual and voice browsers. A first browser facilitates communication in a first mode (e.g., an HTML browser that facilitates visual/tactile interaction with HTML content), and a second browser facilitates communication in a second mode (e.g., a VXML browser that facilitates audio interaction with VXML content). HTML and VXML content is created that: (1) indicates a correspondence between HTML and VXML pages that represent the same underlying content; and (2) contains specialized tags that indicate information to be send from one browser to the other to synchronize each browser to equivalent parts of the content. The HTML browser is adapted to use relative links as signals that information is to be sent to the VXML browser, and the platform on which the VXML browser runs is adapted to recognize a “hit” on its own port 80 as a signal that information is to be sent to the HTML browser.
    Type: Application
    Filed: February 18, 2003
    Publication date: September 25, 2003
    Inventors: Sandeep Sibal, Imran Bashir