Patents by Inventor Selcuk Talay

Selcuk Talay 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: 10831228
    Abstract: An apparatus and method for a voltage reference circuit with flexible and adjustable voltage settings. A voltage reference circuit, comprising a PTAT Current Generator configured to provide current through a first resistor, a CTAT Current Generator configured to provide a CTAT current through a second resistor, a PTAT-CTAT Adder circuit configured to sum the PTAT current, and the CTAT current, wherein said sum of the PTAT and CTAT current through a third resistor is configured to provide an output voltage greater than a silicon bandgap voltage.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: November 10, 2020
    Assignee: Apple Inc.
    Inventors: Turev Acar, Selcuk Talay, Burak Dundar
  • Patent number: 10790746
    Abstract: The present disclosure provides a DC-DC switching converter architecture that utilizes the chip's thermal capacity effectively by implementing adaptive switching frequency scaling over the operation region, keeping the die/package temperature constant. The power budget is effectively utilized, and the external components such as capacitors, inductors, and pass device sizes are reduced, thereby increasing the efficiency of the switching converter. An adaptive frequency scalar is optimized, avoiding losses, especially at high loads. The larger the input and output voltage ranges, the bigger the benefit the disclosure becomes.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: September 29, 2020
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Turev Acar, Selcuk Talay
  • Publication number: 20190361477
    Abstract: An apparatus and method for a voltage reference circuit with flexible and adjustable voltage settings. A voltage reference circuit, comprising a PTAT Current Generator configured to provide current through a first resistor, a CTAT Current Generator configured to provide a CTAT current through a second resistor, a PTAT-CTAT Adder circuit configured to sum the PTAT current, and the CTAT current, wherein said sum of the PTAT and CTAT current through a third resistor is configured to provide an output voltage greater than a silicon bandgap voltage.
    Type: Application
    Filed: August 9, 2019
    Publication date: November 28, 2019
    Inventors: Turev Acar, Selcuk Talay, Burak Dundar
  • Patent number: 10439421
    Abstract: A linear charger circuit and method for providing an output current at an output node is presented. The circuit contains a pass device connected between an input node and the output node, first and second replica devices connected in parallel to the pass device, with their control terminals coupled to a control terminal of the pass device. The first replica device is coupled to a first circuit path for determining whether current output by the linear charger circuit shall be terminated. The second replica device is coupled to a second circuit path for providing feedback for controlling the pass device, a control circuit coupled to the second circuit path for controlling the pass device based on a quantity indicative of a current flowing through the second circuit path, and a switching circuit coupled to the second circuit path.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: October 8, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Mihail Jefremow, Selcuk Talay, Fabio Rigoni
  • Patent number: 10379566
    Abstract: An apparatus and method for a voltage reference circuit with flexible and adjustable voltage settings. A voltage reference circuit, comprising a PTAT Current Generator configured to provide current through a first resistor, a CTAT Current Generator configured to provide a CTAT current through a second resistor, a PTAT-CTAT Adder circuit configured to sum the PTAT current, and the CTAT current, wherein said sum of the PTAT and CTAT current through a third resistor is configured to provide an output voltage greater than a silicon bandgap voltage.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: August 13, 2019
    Assignee: Apple Inc.
    Inventors: Turev Acar, Selcuk Talay, Burak Dundar
  • Publication number: 20190044445
    Abstract: The present disclosure provides a DC-DC switching converter architecture that utilizes the chip's thermal capacity effectively by implementing adaptive switching frequency scaling over the operation region, keeping the die/package temperature constant. The power budget is effectively utilized, and the external components such as capacitors, inductors, and pass device sizes are reduced, thereby increasing the efficiency of the switching converter. An adaptive frequency scalar is optimized, avoiding losses, especially at high loads. The larger the input and output voltage ranges, the bigger the benefit the disclosure becomes.
    Type: Application
    Filed: August 4, 2017
    Publication date: February 7, 2019
    Inventors: Turev Acar, Selcuk Talay
  • Publication number: 20190036353
    Abstract: A linear charger circuit and method for providing an output current at an output node is presented. The circuit contains a pass device connected between an input node and the output node, first and second replica devices connected in parallel to the pass device, with their control terminals coupled to a control terminal of the pass device. The first replica device is coupled to a first circuit path for determining whether current output by the linear charger circuit shall be terminated. The second replica device is coupled to a second circuit path for providing feedback for controlling the pass device, a control circuit coupled to the second circuit path for controlling the pass device based on a quantity indicative of a current flowing through the second circuit path, and a switching circuit coupled to the second circuit path.
    Type: Application
    Filed: July 31, 2017
    Publication date: January 31, 2019
    Inventors: Mihail Jefremow, Selcuk Talay, Fabio Rigoni
  • Patent number: 9729075
    Abstract: A circuit and method for providing an improved efficiency for a DCDC converter. A power converter, comprising a buck converter comprising an adaptive output, an adaptive transconductance block configured to evaluate resistive power terms, a multiplier block configured to provide capacitive power terms, and a comparator configured to compare resistive power and capacitive power terms for determining the selection of the branches of said adaptive output. The method for improved efficiency includes providing a switching converter with an adaptive output stage comprising the steps of providing a switching converter, evaluate capacitive power loss, evaluate resistive power loss, compare capacitive power loss and resistive power loss, and lastly adapting the output stage size.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: August 8, 2017
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Kemal Ozanoglu, Selcuk Talay
  • Patent number: 9698691
    Abstract: A switching DC-to-DC converter has an adaptive duty cycle limiting circuit with an inductor current sensor to generate a sense signal indicative of magnitude of the inductor current. A replica signal is generated from the sense signal and transferred through a replica parasitic resistance circuit. A differential voltage is developed across the replica parasitic resistances and compared with a maximum limit voltage level. The maximum limit voltage level is indicates that a gain level of the switching DC-to-DC converter has decreased even though the duty cycle has increased. A duty cycle limit signal is generated and transferred to disable a switch in a switching circuit for limiting the duty cycle of the switching DC-to-DC converter, when the gain level has decreased such that the switching DC-to-DC converter does not enter a region where the gain of the switching DC-to-DC converter has a negative slope.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: July 4, 2017
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Kemal Ozanoglu, Selcuk Talay, Pier Cavallini, Naoyuki Unno, Louis deMarco
  • Publication number: 20170131736
    Abstract: An apparatus and method for a voltage reference circuit with flexible and adjustable voltage settings. A voltage reference circuit, comprising a PTAT Current Generator configured to provide current through a first resistor, a CTAT Current Generator configured to provide a CTAT current through a second resistor, a PTAT-CTAT Adder circuit configured to sum the PTAT current, and the CTAT current, wherein said sum of the PTAT and CTAT current through a third resistor is configured to provide an output voltage greater than a silicon bandgap voltage.
    Type: Application
    Filed: November 11, 2015
    Publication date: May 11, 2017
    Inventors: Turev Acar, Selcuk Talay, Burak Dundar
  • Publication number: 20160359414
    Abstract: A switching DC-to-DC converter has an adaptive duty cycle limiting circuit with an inductor current sensor to generate a sense signal indicative of magnitude of the inductor current. A replica signal is generated from the sense signal and transferred through a replica parasitic resistance circuit. A differential voltage is developed across the replica parasitic resistances and compared with a maximum limit voltage level. The maximum limit voltage level is indicates that a gain level of the switching DC-to-DC converter has decreased even though the duty cycle has increased. A duty cycle limit signal is generated and transferred to disable a switch in a switching circuit for limiting the duty cycle of the switching DC-to-DC converter, when the gain level has decreased such that the switching DC-to-DC converter does not enter a region where the gain of the switching DC-to-DC converter has a negative slope.
    Type: Application
    Filed: June 4, 2015
    Publication date: December 8, 2016
    Inventors: Kemal Ozanoglu, Selcuk Talay, Pier Cavallini, Naoyuki Unno, Louis deMarco
  • Publication number: 20160336855
    Abstract: A circuit and method for providing an improved efficiency for a DCDC converter. A power converter, comprising a buck converter comprising an adaptive output, an adaptive transconductance block configured to evaluate resistive power terms, a multiplier block configured to provide capacitive power terms, and a comparator configured to compare resistive power and capacitive power terms for determining the selection of the branches of said adaptive output. The method for improved efficiency includes providing a switching converter with an adaptive output stage comprising the steps of providing a switching converter, evaluate capacitive power loss, evaluate resistive power loss, compare capacitive power loss and resistive power loss, and lastly adapting the output stage size.
    Type: Application
    Filed: May 15, 2015
    Publication date: November 17, 2016
    Inventors: Kemal Ozanoglu, Selcuk Talay
  • Patent number: 9407144
    Abstract: A current mode control buck-boost converter with improved performance utilizes separate buck and boost pulses. The buck-boost converter utilizes a buck/boost decision method with continuous control voltage for buck and boost mode, therefore eliminating transients in the control loop between operation modes and preventing voltage overshoots. If switching in Boost mode and the buck duty cycle is smaller than a set duty cycle, then in the next cycle Buck mode switching will occur. It is possible to track a Buck comparator output and the related duty cycle during Boost mode operation. Thus a mode change decision will only be dependent on a single input. A control loop will incorporate a single loop filter and error amplifier, wherein control voltages for Buck comparator and Boost comparator will be related.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: August 2, 2016
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Kemal Ozanoglu, Selcuk Talay, Pier Cavallini, Dieter Graefje, Andrea Acquas
  • Patent number: 9323266
    Abstract: A method and a system for increasing the open loop gain of linear regulators are presented. A linear regulator to derive an output voltage from an input voltage is described. The linear regulator contains an amplifier to derive an amplifier output signal from an amplifier input signal, and a pass device to convert the amplifier output signal into the output voltage. The linear regulator has a positive feedback loop using a positive feedback gain ?, and a negative feedback loop using a negative feedback gain ?. In addition, the linear regulator has a combining unit to determine the amplifier input signal from the input voltage, from the positive feedback signal and from the negative feedback voltage. A transfer function of the linear regulator exhibits a first and a second pole at a first frequency wp1 and at a second frequency wp2, respectively.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: April 26, 2016
    Assignee: Dialog Semiconductor GmbH
    Inventors: Kemal Ozanoglu, Merve Toka, Selcuk Talay, Frank Kronmueller
  • Publication number: 20150357914
    Abstract: A current mode control buck-boost converter with improved performance utilizes separate buck and boost pulses. The buck-boost converter utilizes a buck/boost decision method with continuous control voltage for buck and boost mode, therefore eliminating transients in the control loop between operation modes and preventing voltage overshoots. If switching in Boost mode and the buck duty cycle is smaller than a set duty cycle, then in the next cycle Buck mode switching will occur. It is possible to track a Buck comparator output and the related duty cycle during Boost mode operation. Thus a mode change decision will only be dependent on a single input. A control loop will incorporate a single loop filter and error amplifier, wherein control voltages for Buck comparator and Boost comparator will be related.
    Type: Application
    Filed: June 19, 2014
    Publication date: December 10, 2015
    Inventors: Kemal Ozanoglu, Selcuk Talay, Pier Cavallini, Dieter Graefje, Andrea Acquas
  • Publication number: 20150177760
    Abstract: A method and a system for increasing the open loop gain of linear regulators is presented. A linear regulator configured to derive an output voltage from an input voltage is described. The linear regulator comprises an amplifier configured to derive an amplifier output signal from an amplifier input signal, and a pass device configured to convert the amplifier output signal into the output voltage. The linear regulator comprises a positive feedback loop using a positive feedback gain ?, and a negative feedback loop using a negative feedback gain ?. In addition, the linear regulator comprises a combining unit configured to determine the amplifier input signal from the input voltage, from the positive feedback signal and from the negative feedback voltage. A transfer function of the linear regulator exhibits a first and a second pole at a first frequency wp1 and at a second frequency wp2, respectively.
    Type: Application
    Filed: September 24, 2014
    Publication date: June 25, 2015
    Inventors: Kemal Ozanoglu, Merve Toka, Selcuk Talay, Frank Kronmueller