Patents by Inventor Celal Avci
Celal Avci 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).
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Publication number: 20240039276Abstract: Systems, devices, and methods related to electrostatic discharge (ESD) protection in radio frequency (RF) switch circuitry are provided. An electrostatic discharge (ESD)-protected radio frequency (RF) switch circuitry includes a common port; at least one terminal port; a switch circuitry coupled between the common port and the at least one terminal port, wherein the switch circuitry comprises one or more transistors connected in a stacked configuration; and a first ESD protection circuitry coupled between a gate of a first transistor of the one or more transistors and a driver circuitry for the first transistor.Type: ApplicationFiled: July 28, 2022Publication date: February 1, 2024Applicant: Analog Devices International Unlimited CompanyInventors: Alp OGUZ, Turusan KOLCUOGLU, Celal AVCI, Atilim Ergul
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Patent number: 11863227Abstract: Radio frequency switches with improved switching speed are provided. In certain embodiments, an RF switching circuit includes a FET switch including a gate, a digital buffer configured to provide a first output voltage to the gate of the FET during a steady-state, and a fast switching circuit in parallel with the digital buffer and configured to provide a second output voltage to the gate of the FET during a switching state. The fast switching circuit includes at least one charge pump configured to boost at least one supply voltage to a multiple of the at least one supply voltage. The fast switching circuit is configured to generate the second output voltage based on the boosted at least one supply voltage.Type: GrantFiled: October 25, 2021Date of Patent: January 2, 2024Assignee: Analog Devices International Unlimited CompanyInventors: Celal Avci, Ercan Kaymaksut, Huseyin Kayahan
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Publication number: 20230128170Abstract: Radio frequency switches with improved switching speed are provided. In certain embodiments, an RF switching circuit includes a FET switch including a gate, a digital buffer configured to provide a first output voltage to the gate of the FET during a steady-state, and a fast switching circuit in parallel with the digital buffer and configured to provide a second output voltage to the gate of the FET during a switching state. The fast switching circuit includes at least one charge pump configured to boost at least one supply voltage to a multiple of the at least one supply voltage. The fast switching circuit is configured to generate the second output voltage based on the boosted at least one supply voltage.Type: ApplicationFiled: October 25, 2021Publication date: April 27, 2023Inventors: Celal Avci, Ercan Kaymaksut, Huseyin Kayahan
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Patent number: 11545811Abstract: Laser driver designs that aim to reduce or eliminate the problem of fault laser firing are disclosed. Various laser driver designs presented herein are based on providing a current dissipation path that is configured to start providing a resistance for dissipating at least a portion, but preferably substantially all, of the negative current from the laser diode. Dissipating at least a portion of the negative current may decrease the unintentional increase of the voltage at the input to the laser diode and, therefore, reduce the likelihood that fault laser firing will occur. A control logic may be used to control the timing of when the current dissipation path is activated (i.e., provides the resistance to dissipate the negative current from the laser diode) and when it is deactivated.Type: GrantFiled: October 2, 2019Date of Patent: January 3, 2023Assignee: ANALOG DEVICES INTERNATIONAL UNLIMITED COMPANYInventors: Celal Avci, Yalcin Alper Eken, Ercan Kaymaksut, Shawn S. Kuo, Atilim Ergul, Mehmet Arda Akkaya
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Patent number: 11209848Abstract: Apparatus and methods for assisting a voltage regulator. In an example, a voltage regulator can include an error amplifier configured to compare a reference voltage with a representation of an output voltage of the voltage regulator, an output transistor coupled to a supply voltage and configured to receive an output of the error amplifier and to provide the output voltage, and an auxiliary-current circuit including a helper transistor having a terminal coupled to the output voltage, the helper transistor configured to turn on when the output voltage drops due to current demand from the load and to provide charge current to the load in addition to current provided by the output transistor.Type: GrantFiled: June 7, 2016Date of Patent: December 28, 2021Assignee: Analog Devices International Unlimited CompanyInventors: Celal Avci, Tarik Cavus, Savas Tokmak, Yalcin Alper Eken
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Publication number: 20210104866Abstract: Laser driver designs that aim to reduce or eliminate the problem of fault laser firing are disclosed. Various laser driver designs presented herein are based on providing a current dissipation path that is configured to start providing a resistance for dissipating at least a portion, but preferably substantially all, of the negative current from the laser diode. Dissipating at least a portion of the negative current may decrease the unintentional increase of the voltage at the input to the laser diode and, therefore, reduce the likelihood that fault laser firing will occur. A control logic may be used to control the timing of when the current dissipation path is activated (i.e., provides the resistance to dissipate the negative current from the laser diode) and when it is deactivated.Type: ApplicationFiled: October 2, 2019Publication date: April 8, 2021Applicant: Analog Devices International Unlimited CompanyInventors: Celal AVCI, Yalcin Alper EKEN, Ercan KAYMAKSUT, Shawn S. KUO, Atilim ERGUL, Mehmet Arda AKKAYA
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Patent number: 10866607Abstract: Techniques that can prevent the low dropout (LDO) output voltage degradation that occurs with conventional LDO regulators, even with large LDO supply variations. An LDO regulator circuit can include another loop that is much slower than the main LDO regulator loop, concentrates the load regulation, and fixes the voltage regulation runaway problem due to the large supply variation with large frequency content. The LDO regulator circuit can include a negative feedback correction loop that corrects the LDO output by, in some examples, adding sink current to the main voltage regulation loop via a programmable current sink element.Type: GrantFiled: December 17, 2019Date of Patent: December 15, 2020Assignee: Analog Devices International Unlimited CompanyInventors: Celal Avci, James Lin, Shawn S. Kuo
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Publication number: 20190036492Abstract: A wide range differential current switching circuit can operate across a wide range of input currents and across a broad range of frequencies. A first differential current source can include a first transistor and a second transistor. The first transistor receives a switching signal and provides an output current and at output node. The second transistor receives an inverted switching signal, the first transistor and the second transistor coupled to each other at a tail node. A current source provides an input current to the tail node. A third transistor can provide a boost current to the tail node while the first transistor is off.Type: ApplicationFiled: July 31, 2017Publication date: January 31, 2019Inventors: Celal Avci, Bilal Tarik Cavus
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Patent number: 10193507Abstract: A wide range differential current switching circuit can operate across a wide range of input currents and across a broad range of frequencies. A first differential current source can include a first transistor and a second transistor. The first transistor receives a switching signal and provides an output current and at output node. The second transistor receives an inverted switching signal, the first transistor and the second transistor coupled to each other at a tail node. A current source provides an input current to the tail node. A third transistor can provide a boost current to the tail node while the first transistor is off.Type: GrantFiled: July 31, 2017Date of Patent: January 29, 2019Assignee: Analog Devices GlobalInventors: Celal Avci, Bilal Tarik Cavus
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Publication number: 20170351284Abstract: Apparatus and methods for assisting a voltage regulator. In an example, a voltage regulator can include an error amplifier configured to compare a reference voltage with a representation of an output voltage of the voltage regulator, an output transistor coupled to a supply voltage and configured to receive an output of the error amplifier and to provide the output voltage, and an auxiliary-current circuit including a helper transistor having a terminal coupled to the output voltage, the helper transistor configured to turn on when the output voltage drops due to current demand from the load and to provide charge current to the load in addition to current provided by the output transistor.Type: ApplicationFiled: June 7, 2016Publication date: December 7, 2017Inventors: Celal Avci, Tarik Cavus, Savas Tokmak, Yalcin Alper Eken
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Patent number: 9112406Abstract: The present document relates to charge pump voltage doublers for use in integrated circuits. A charge pump circuit configured to generate an output voltage Vout at an output of the circuit from an input voltage Vin at an input of the circuit is described. The circuit further comprises a boosting capacitor coupled at a first side to the output node of the first P-type switch and coupled at a second side to a capacitor control signal. Furthermore, the circuit comprises control circuitry configured to provide a capacitor control-signal-which alternates between a low level and a high level, and configured to generate first and second control signals based on the capacitor control signal for alternating the first and second P-type switches between on-states and off-states, respectively, such that electrical energy is transferred from the input to the output of the circuit using the boosting capacitor.Type: GrantFiled: June 27, 2014Date of Patent: August 18, 2015Assignee: Dialog Semiconductor GmbHInventors: Celal Avci, Kemal Ozanoglu, Serhan Eroz, Emre Topcu
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Publication number: 20150102854Abstract: The present document relates to charge pump voltage doublers for use in integrated circuits. A charge pump circuit configured to generate an output voltage Vout at an output of the circuit from an input voltage Vin at an input of the circuit is described. The circuit further comprises a boosting capacitor coupled at a first side to the output node of the first P-type switch and coupled at a second side to a capacitor control signal. Furthermore, the circuit comprises control circuitry configured to provide a capacitor control-signal-which alternates between a low level and a high level, and configured to generate first and second control signals based on the capacitor control signal for alternating the first and second P-type switches between on-states and off-states, respectively, such that electrical energy is transferred from the input to the output of the circuit using the boosting capacitor.Type: ApplicationFiled: June 27, 2014Publication date: April 16, 2015Inventors: Celal Avci, Kemal Ozanoglu, Serhan Eroz, Emre Topcu