Patents by Inventor Gregory Szczeszynski

Gregory Szczeszynski 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: 20140176018
    Abstract: In one aspect, a circuit includes a switching regulator configured to provide power to a load, a current regulator circuit coupled to the load and a response circuit configured to provide a control signal to the switching regulator in response to electrical changes of the current regulator circuit. The control signal changes non-linearly with respect to the electrical changes at the current regulator circuit. In another aspect, a circuit includes an adaptive regulation voltage circuit configured to provide a regulation voltage to a first input of an amplifier to maintain operability of a current regulator circuit. The adaptive regulation voltage circuit replicates electrical characteristics of the current regulator circuit.
    Type: Application
    Filed: January 6, 2014
    Publication date: June 26, 2014
    Applicant: Allegro Microsystems, LLC
    Inventors: Gregory Szczeszynski, Matthew Szaniawski
  • Patent number: 8724353
    Abstract: A switched capacitor power converter includes active semiconductor switch elements that are configured to electrically interconnect capacitors to one another in successive states. Switch driving circuits, each with a control input, power connections, and a drive output are coupled to and for control of one or more of the switch elements. At least some switch driving circuits are configured to be from one or more of the capacitors such that the voltage across power connections of said driving circuit is substantially less than a high voltage terminal of the converter. In some examples, the switch elements are configured to interconnect at least some capacitors to one another through a series of multiple of the switch elements.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 13, 2014
    Assignee: Arctic Sand Technologies, Inc.
    Inventors: David Giuliano, Gregory Szczeszynski, Raymond Barrett, Jr.
  • Publication number: 20140125236
    Abstract: Electronic circuits provide an error signal to control a regulated output voltage signal generated by a controllable DC-DC converter for driving one or more series connected strings of light emitting diodes.
    Type: Application
    Filed: January 7, 2014
    Publication date: May 8, 2014
    Applicant: Allegro Microsystems, LLC
    Inventors: Gregory Szczeszynski, Bassem Alnahas, Vijay Mangtani
  • Patent number: 8692482
    Abstract: In one aspect, a circuit includes a switching regulator configured to provide power to a load, a current regulator circuit coupled to the load and a response circuit configured to provide a control signal to the switching regulator in response to electrical changes of the current regulator circuit. The control signal changes non-linearly with respect to the electrical changes at the current regulator circuit. In another aspect, a circuit includes an adaptive regulation voltage circuit configured to provide a regulation voltage to a first input of an amplifier to maintain operability of a current regulator circuit. The adaptive regulation voltage circuit replicates electrical characteristics of the current regulator circuit.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: April 8, 2014
    Assignee: Allegro Microsystems, LLC
    Inventors: Gregory Szczeszynski, Matthew Szaniawski
  • Publication number: 20140055115
    Abstract: Methods and apparatus for a circuit including a DC-DC converter comprising: a boost converter to provide a DC voltage output from a DC input voltage, the DC output voltage configured to connect with a first load terminal, a feedback module configured to connect with a second load terminal, a switching module having a switching element coupled to the boost converter, and a control circuit coupled to the switching module to control operation of the switching element, the control circuit coupled to the feedback module, wherein the control circuit includes a slope generator to generate a ramp signal having a slope that can vary cycle to cycle.
    Type: Application
    Filed: March 15, 2013
    Publication date: February 27, 2014
    Inventors: PRANAV RAVAL, Gregory Szczeszynski, George Humphrey
  • Publication number: 20140055051
    Abstract: An electronic circuit for driving a plurality of light emitting diode (LED) channels coupled to a common voltage node includes a priority queue for tracking a dominant LED channel. A queue manager may be provided to keep the priority queue updated during LED drive operations based on operating conditions associated with the LED channels.
    Type: Application
    Filed: August 22, 2012
    Publication date: February 27, 2014
    Applicant: Allegro Microsystems, Inc.
    Inventors: Pranav Raval, Gregory Szczeszynski, David Toebes
  • Publication number: 20140055045
    Abstract: A control circuit used to control a DC-DC converter includes a duty cycle control unit to control a duty cycle of the DC-DC converter and a hysteretic control unit to maintain a voltage at an output of the DC-DC converter within a narrow range during certain operational time periods. The hysteretic control unit may maintain the converter output voltage within the range by alternately enabling and disabling the duty cycle control unit based on feedback from the DC-DC converter output. In at least one embodiment, the control circuit is used within LED driver circuitry for driving a plurality of LED channels.
    Type: Application
    Filed: August 22, 2012
    Publication date: February 27, 2014
    Applicant: Allegro Microsystems, Inc.
    Inventors: Pranav Raval, Gregory Szczeszynski, Bassem Alnahas
  • Patent number: 8653756
    Abstract: Electronic circuits provide an error signal to control a regulated output voltage signal generated by a controllable DC-DC converter for driving one or more series connected strings of light emitting diodes.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: February 18, 2014
    Assignee: Allegro Microsystems, LLC
    Inventors: Gregory Szczeszynski, Bassem AINahas, Vijay Mangtani
  • Patent number: 8619445
    Abstract: Transient or fault conditions for a switched capacitor power converter are detected by measuring one or more of internal voltages and/or currents associated with switching elements (e.g., transistors) or phase nodes, or voltages or currents at terminals of the converter, and based on these measurements detect that a condition has occurred when the measurements deviate from a predetermined range. Upon detection of the condition fault control circuitry alters operation of the converter, for example, by using a high voltage switch to electrically disconnect at least some of the switching elements from one or more terminals of the converter, or by altering timing characteristics of the phase signals.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: December 31, 2013
    Assignee: Arctic Sand Technologies, Inc.
    Inventors: Aichen Low, David M. Giuliano, Gregory Szczeszynski, Jeff Summit, Oscar Blyde
  • Patent number: 8610371
    Abstract: In one aspect, a circuit includes a plurality of comparators. Each comparator is configured to receive a first input from a corresponding load of a plurality of loads and to receive a second input as a regulation voltage. The circuit also includes an amplifier configured to receive signals provided by the plurality of comparators, a pulse-width modulation (PWM) circuit configured to receive a control signal from the amplifier and to provide a signal to a primary switch to control voltage provided to the loads and an output switch sequencer coupled to each of the comparators and configured to provide control signals to control switches coupled to the primary switch enabling one control switch to be active at a time. Each control switch provides a voltage increase to a respective load of the plurality of loads if enabled.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: December 17, 2013
    Assignee: Allegro Microsystems, LLC
    Inventors: Nai-Chi Lee, Gregory Szczeszynski, Vijay Mangtani
  • Patent number: 8503203
    Abstract: An apparatus for voltage conversion includes a switched capacitor circuit, a pre-charge circuit, a voltage divider stage, and a driver stage. The switched capacitor circuit has pump capacitors to transfer energy and a steady-state operating mode and a pre-charge mode. The pre-charge circuit initially charges the pump capacitors when the switched capacitor circuit operates in the pre-charge mode. It includes a voltage divider stage having one or more nodes, each of which provides voltage at one of a corresponding one or more voltage levels, and a driver stage having one or more cascoded drivers, each of which comprises a first terminal for receiving a drive signal that depends at least in part on a voltage level at a corresponding one of the nodes, and a second terminal for coupling to a pump capacitor and to another of the drivers.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: August 6, 2013
    Assignee: Arctic Sand Technologies, Inc.
    Inventors: Gregory Szczeszynski, David Guiliano, Raymond Barrett, Jr.
  • Patent number: 8482225
    Abstract: A circuit for driving an LED load with a controllable converter includes a control circuit configured to turn off the converter in response to a PWM signal having a first level and to turn on the converter in response to the PWM signal having a second level. A load disconnect switch coupled in series with the LED load is also controlled by the PWM signal so that the load disconnect switch is opened when the PWM signal turns off the converter to thereby open the load current path.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: July 9, 2013
    Assignee: Allegro Microsystems, LLC
    Inventor: Gregory Szczeszynski
  • Publication number: 20130162152
    Abstract: In one aspect, a circuit includes a plurality of comparators. Each comparator is configured to receive a first input from a corresponding load of a plurality of loads and to receive a second input as a regulation voltage. The circuit also includes an amplifier configured to receive signals provided by the plurality of comparators, a pulse-width modulation (PWM) circuit configured to receive a control signal from the amplifier and to provide a signal to a primary switch to control voltage provided to the loads and an output switch sequencer coupled to each of the comparators and configured to provide control signals to control switches coupled to the primary switch enabling one control switch to be active at a time. Each control switch provides a voltage increase to a respective load of the plurality of loads if enabled.
    Type: Application
    Filed: December 22, 2011
    Publication date: June 27, 2013
    Applicant: Allegro Microsystems, Inc.
    Inventors: Nai-Chi Lee, Gregory Szczeszynski, Vijay Mangtani
  • Publication number: 20130009556
    Abstract: Circuits and methods used therein provide an adjustable average current through a load in accordance with a pulse width modulated (PWM) signal. A condition detection circuit is configured to identify a condition of the electronic circuit and to generate a condition signal indicative of the condition. A current extension circuit is coupled receive the condition signal and coupled to receive the PWM signal. The current extension circuit is configured to generate, at the output node of the current extension circuit, an extended PWM signal having a first state and a second state. The first state of the extended PWM signal longer in time than a first state of the PWM signal by an amount related to a value or a state of the condition signal. Current pulses through the load are extended to be longer in accordance with the extended PWM signal.
    Type: Application
    Filed: July 6, 2011
    Publication date: January 10, 2013
    Applicant: ALLEGRO MICROSYSTEMS, INC.
    Inventors: Gregory Szczeszynski, Vijay Mangtani
  • Publication number: 20130009557
    Abstract: An electronic circuit, referred to as an on-time extension circuit herein, provides an ability to adjust a power delivered to a load by pulsing a predetermined current to the load. The on time of the a DC-DC converter used to provide the power iS extended to be longer than the on time of the current pulse when the on time of the current pulses becomes very short.
    Type: Application
    Filed: July 6, 2011
    Publication date: January 10, 2013
    Applicant: ALLEGRO MICROSYSTEMS, INC.
    Inventor: Gregory Szczeszynski
  • Publication number: 20120274228
    Abstract: A circuit for driving an LED load with a controllable converter includes a control circuit configured to turn off the converter in response to a PWM signal having a first level and to turn on the converter in response to the PWM signal having a second level. A load disconnect switch coupled in series with the LED load is also controlled by the PWM signal so that the load disconnect switch is opened when the PWM signal turns off the converter to thereby open the load current path.
    Type: Application
    Filed: April 28, 2011
    Publication date: November 1, 2012
    Applicant: Allegro Microsystems, Inc
    Inventor: Gregory Szczeszynski
  • Patent number: 8274238
    Abstract: An electronic circuit includes circuit portions for identifying a largest voltage drop through one of a plurality of series connected diode strings and for controlling a boost switching regulator according to the largest voltage drop. The electronic circuit can sense an open circuit series connected diode string, which would otherwise have the largest voltage drop, and can disconnect that open circuit series connected diode string from control of the boost switching regulator. Another electronic circuit includes a current limiting circuit coupled to or within a boost switching regulator and configured to operate with a diode load. Another electronic circuit includes a pulse width modulation circuit configured to dim a series connected string of light emitting diodes.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: September 25, 2012
    Assignee: Allegro Microsystems, Inc.
    Inventors: Gregory Szczeszynski, Shashank Wekhande, Vijay Mangtani
  • Publication number: 20120181939
    Abstract: Electronic circuits provide an error signal to control a regulated output voltage signal generated by a controllable DC-DC converter for driving one or more series connected strings of light emitting diodes.
    Type: Application
    Filed: March 23, 2012
    Publication date: July 19, 2012
    Applicant: ALLEGRO MICROSYSTEMS, INC.
    Inventors: Gregory Szczeszynski, Bassem AlNahas, Vijay Mangtani
  • Publication number: 20120146541
    Abstract: In one aspect, a circuit includes a switching regulator configured to provide power to a load, a current regulator circuit coupled to the load and a response circuit configured to provide a control signal to the switching regulator in response to electrical changes of the current regulator circuit. The control signal changes non-linearly with respect to the electrical changes at the current regulator circuit. In another aspect, a circuit includes an adaptive regulation voltage circuit configured to provide a regulation voltage to a first input of an amplifier to maintain operability of a current regulator circuit. The adaptive regulation voltage circuit replicates electrical characteristics of the current regulator circuit.
    Type: Application
    Filed: December 13, 2010
    Publication date: June 14, 2012
    Applicant: Allegro Microsystems, Inc.
    Inventors: Gregory Szczeszynski, Matthew Szaniawski
  • Patent number: 8169161
    Abstract: Electronic circuits provide an error signal to control a regulated output voltage signal generated by a controllable DC-DC converter for driving one or more series connected strings of light emitting diodes.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: May 1, 2012
    Assignee: Allegro Microsystems, Inc.
    Inventors: Gregory Szczeszynski, Bassem AlNahas, Vijay Mangtani