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: 10831228Abstract: 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: GrantFiled: August 9, 2019Date of Patent: November 10, 2020Assignee: Apple Inc.Inventors: Turev Acar, Selcuk Talay, Burak Dundar
-
Patent number: 10790746Abstract: 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: GrantFiled: August 4, 2017Date of Patent: September 29, 2020Assignee: Dialog Semiconductor (UK) LimitedInventors: Turev Acar, Selcuk Talay
-
Publication number: 20190361477Abstract: 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: ApplicationFiled: August 9, 2019Publication date: November 28, 2019Inventors: Turev Acar, Selcuk Talay, Burak Dundar
-
Patent number: 10439421Abstract: 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: GrantFiled: July 31, 2017Date of Patent: October 8, 2019Assignee: Dialog Semiconductor (UK) LimitedInventors: Mihail Jefremow, Selcuk Talay, Fabio Rigoni
-
Patent number: 10379566Abstract: 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: GrantFiled: November 11, 2015Date of Patent: August 13, 2019Assignee: Apple Inc.Inventors: Turev Acar, Selcuk Talay, Burak Dundar
-
Publication number: 20190044445Abstract: 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: ApplicationFiled: August 4, 2017Publication date: February 7, 2019Inventors: Turev Acar, Selcuk Talay
-
Publication number: 20190036353Abstract: 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: ApplicationFiled: July 31, 2017Publication date: January 31, 2019Inventors: Mihail Jefremow, Selcuk Talay, Fabio Rigoni
-
Patent number: 9729075Abstract: 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: GrantFiled: May 15, 2015Date of Patent: August 8, 2017Assignee: Dialog Semiconductor (UK) LimitedInventors: Kemal Ozanoglu, Selcuk Talay
-
Patent number: 9698691Abstract: 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: GrantFiled: June 4, 2015Date of Patent: July 4, 2017Assignee: Dialog Semiconductor (UK) LimitedInventors: Kemal Ozanoglu, Selcuk Talay, Pier Cavallini, Naoyuki Unno, Louis deMarco
-
Publication number: 20170131736Abstract: 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: ApplicationFiled: November 11, 2015Publication date: May 11, 2017Inventors: Turev Acar, Selcuk Talay, Burak Dundar
-
Publication number: 20160359414Abstract: 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: ApplicationFiled: June 4, 2015Publication date: December 8, 2016Inventors: Kemal Ozanoglu, Selcuk Talay, Pier Cavallini, Naoyuki Unno, Louis deMarco
-
Publication number: 20160336855Abstract: 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: ApplicationFiled: May 15, 2015Publication date: November 17, 2016Inventors: Kemal Ozanoglu, Selcuk Talay
-
Patent number: 9407144Abstract: 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: GrantFiled: June 19, 2014Date of Patent: August 2, 2016Assignee: Dialog Semiconductor (UK) LimitedInventors: Kemal Ozanoglu, Selcuk Talay, Pier Cavallini, Dieter Graefje, Andrea Acquas
-
Patent number: 9323266Abstract: 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: GrantFiled: September 24, 2014Date of Patent: April 26, 2016Assignee: Dialog Semiconductor GmbHInventors: Kemal Ozanoglu, Merve Toka, Selcuk Talay, Frank Kronmueller
-
Publication number: 20150357914Abstract: 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: ApplicationFiled: June 19, 2014Publication date: December 10, 2015Inventors: Kemal Ozanoglu, Selcuk Talay, Pier Cavallini, Dieter Graefje, Andrea Acquas
-
Publication number: 20150177760Abstract: 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: ApplicationFiled: September 24, 2014Publication date: June 25, 2015Inventors: Kemal Ozanoglu, Merve Toka, Selcuk Talay, Frank Kronmueller