Patents by Inventor Aleksandar Prodi?

Aleksandar Prodi? 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).

  • Sensorless self-tuning digital current programmed mode (CPM) controller with multiple parameter estimation and thermal stress equalization
    Patent number: 8536842
    Abstract: A multiphase controller for a DC-to-DC power supply includes logic to estimate parameters for multiple phases that provide a combined output at a load. The estimated parameters include a current estimate and an effective resistance estimates for each phase so that a power estimate for each phase can be produced. The logic adjusts the operation of the phases using the power estimate for each phase.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: September 17, 2013
    Assignee: Exar Corporation
    Inventors: Aleksandar Prodić, Zdravko Lukić, Sheikh Mohammad Ahsanuzzaman, Zhenyu Zhao
  • ESR zero estimation and auto-compensation in digitally controlled buck converters
    Patent number: 8115459
    Abstract: One embodiment of the present invention is a digitally controlled DC-DC converter comprising of a power stage including at least one switch and an output capacitor. A digital controller can control the switching of the at least one switch. The digital controller can include logic to produce an indication related to a zero resulting from the equivalent series resistance (ESR) of the output capacitor and to update the control of the switching of the switch in the power stage based on the estimate.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: February 14, 2012
    Assignee: Exar Corporation
    Inventors: Aleksandar Prodić, Zhenyu Zhao, Sheikh Mohammad Ahsanuzzaman
  • Digital pulse-width modulator based on non-symmetric self-oscillating circuit
    Patent number: 7710174
    Abstract: A low-power digital pulse-width modulator (DPWM) architecture for high frequency dc-dc switch-mode power supplies (SMPS) is disclosed that is well-suited for integration in power management systems of small handheld devices. The DPWM can operate in a stand-alone mode, without external clock, and can be implemented on a portion of silicon area needed for other DPWM solutions. In addition it has low power consumption and provides a good linearity of the input-to-output characteristic, also not characteristic for other architectures.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: May 4, 2010
    Assignee: Exar Corporation
    Inventors: Aleksandar Prodić, Kun Wang, Amir Parayandeh
  • Digital pulse frequency/pulse amplitude (DPFM/DPAM) controller for low-power switching-power supplies
    Patent number: 7710209
    Abstract: A digital controller for dc-dc switching converters can operate under light load conditions. The controller can be suitable for the use in switch-mode power supplies providing regulated output voltage for handheld devices and other low-power electronics. To create long time intervals, compared to the propagation time of digital logic a DPFM/DPAM can use a ring oscillator with two sets of delay cells and two signals racing around the ring.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: May 4, 2010
    Assignee: Exar Corporation
    Inventors: Aleksandar Prodić, Kun Wang, Amir Parayandeh
  • Wide-input windowed nonlinear analog-to-digital converter for high-frequency digitally controlled SMPS
    Patent number: 7525471
    Abstract: In embodiments, a new analog-to-digital converter (ADC) architecture can be used with switch-mode power supplies (SMPS) operating at switching frequencies higher than 10 MHz. Analog-to-digital converter embodiments can achieve very low power consumption, fast conversion time, and can be implemented with a simple hardware. Another noteworthy benefit is that certain ADC embodiments feature a non-linear gain characteristic that provides improved load transient response for digital controllers.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: April 28, 2009
    Assignee: EXAR Corporation
    Inventors: Aleksandar Prodić, Zdravko Lukić