Patents by Inventor Oleksiy Klimashov
Oleksiy Klimashov 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: 20240056035Abstract: Apparatus and methods for amplifier linearization are disclosed. In certain embodiments, an RF amplifier includes an RF input terminal that receives an RF input signal, an RF output terminal that provides an RF output signal, a gallium nitride field-effect transistor (GaN FET) having a gate connected to the RF input terminal and a drain connected to the RF output terminal. The GaN FET amplifies the RF input signal. The RF amplifier further includes a gallium arsenide field-effect transistor (GaAs FET) having a gate connected to the RF input terminal and a drain connected to the RF output terminal. The GaAs FET is operable to linearize the GaN FET.Type: ApplicationFiled: July 31, 2023Publication date: February 15, 2024Inventors: Yu Zhu, Oleksiy Klimashov, Dylan Charles Bartle, Paul T. DiCarlo
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Publication number: 20230421154Abstract: Described herein are switches with asymmetrical anti-series varactor pairs to improve switching performance. The disclosed switches can include asymmetrical varactor pairs to reduce distortions. The asymmetry in the varactor pairs can be associated with geometry of each varactor in the pair. The disclosed switches can stack both symmetrical and asymmetrical varactor pairs. The disclosed switches with asymmetrical anti-series varactor pairs can be configured to improve both H2 and H3 simultaneously.Type: ApplicationFiled: May 1, 2023Publication date: December 28, 2023Inventors: Yu Zhu, Oleksiy Klimashov, Paul T. DiCarlo
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Publication number: 20230253936Abstract: The present disclosure relates to a radio frequency circuit comprising a linearizer circuit. The linearizer circuit may comprise a first capacitor and a second capacitor arranged in parallel. The first capacitor may have a positive third order derivative of charge with respect to voltage. The second capacitor may have a negative third order derivative of charge with respect to voltage. Related radio frequency modules and wireless communication devices are also disclosed.Type: ApplicationFiled: January 30, 2023Publication date: August 10, 2023Inventors: Yu Zhu, Oleksiy Klimashov, Dylan Charles Bartle, Paul T. DiCarlo
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Patent number: 11641204Abstract: Described herein are switches with asymmetrical anti-series varactor pairs to improve switching performance. The disclosed switches can include asymmetrical varactor pairs to reduce distortions. The asymmetry in the varactor pairs can be associated with geometry of each varactor in the pair. The disclosed switches can stack both symmetrical and asymmetrical varactor pairs. The disclosed switches with asymmetrical anti-series varactor pairs can be configured to improve both H2 and H3 simultaneously.Type: GrantFiled: December 31, 2021Date of Patent: May 2, 2023Assignee: SKYWORKS SOLUTIONS, INC.Inventors: Yu Zhu, Oleksiy Klimashov, Paul T DiCarlo
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Publication number: 20220393655Abstract: According to at least one example of the disclosure, a power amplifier is provided comprising a first power switch of a first type being configured to receive an input signal and provide an amplified output signal to an output connection configured to be coupled to a load, and a second power switch of a second type different than the first type, the second power switch being configured to improve a linearity of the power amplifier and being coupled to the output connection.Type: ApplicationFiled: June 7, 2022Publication date: December 8, 2022Inventors: Yu Zhu, Oleksiy Klimashov, Dylan Charles Bartle, Paul T. DiCarlo
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Publication number: 20220247406Abstract: Described herein are switches with asymmetrical anti-series varactor pairs to improve switching performance. The disclosed switches can include asymmetrical varactor pairs to reduce distortions. The asymmetry in the varactor pairs can be associated with geometry of each varactor in the pair. The disclosed switches can stack both symmetrical and asymmetrical varactor pairs. The disclosed switches with asymmetrical anti-series varactor pairs can be configured to improve both H2 and H3 simultaneously.Type: ApplicationFiled: December 31, 2021Publication date: August 4, 2022Inventors: Yu Zhu, Oleksiy Klimashov, Paul T DiCarlo
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Publication number: 20200389166Abstract: Circuits, systems, and methods to compensate for non-linearities associated with a switching circuit are discussed herein. For example, a switch circuit can include a switch arm and a linearizer arm. The switch arm can have a first transistor connected between an input node and an output node. The switch arm can be configured to receive a radio-frequency signal. The linearizer arm can have a second transistor connected to at least one of a gate or a body of the first transistor. The linearizer arm can be configured to compensate a non-linearity effect generated by the switch arm.Type: ApplicationFiled: June 4, 2020Publication date: December 10, 2020Inventors: Yu ZHU, Oleksiy KLIMASHOV, Jerod F. MASON, Hanching FUH, Dylan Charles BARTLE, Paul T. DICARLO
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Patent number: 10812026Abstract: Envelope tracking can be employed to reduce power consumption of a power amplifier, but envelope tracking can introduce nonlinearities to a power amplifier. These nonlinearities can manifest themselves as noise at the output of the power amplifier. Embodiments described herein provide techniques for characterizing a parameter indicative of power amplifier noise when envelope tracking is employed. Measurement of this parameter can permit power amplifier designers to decide whether to forgo envelope tracking if a power amplifier is too susceptible to such noise, redesign the power amplifier to improve compatibility with envelope tracking, or to employ distortion compensation circuitry to reduce the noise output by the power amplifier. Counterintuitively, this distortion compensation circuitry may involve increasing the power, such as the envelope tracking power supply. However, increasing the power may be a desirable trade-off for increased linearity.Type: GrantFiled: June 24, 2019Date of Patent: October 20, 2020Assignee: Skyworks Solutions, Inc.Inventors: Yu Zhu, Oleksiy Klimashov, Dylan C. Bartle, Paul T. DiCarlo
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Patent number: 10574191Abstract: A linearization circuit reduces intermodulation distortion in an amplifier that includes a first stage and a second stage. The linearization circuit receives a first signal that includes a first frequency and a second frequency and generates a difference signal having a frequency approximately equal to the difference of the first frequency and the second frequency, generates an envelope signal based at least in part on a power level of the first signal, and adjusts a magnitude of the difference signal based on the envelope signal. When the amplifier receives the first signal at an input terminal, the first stage receives the adjusted signal, and the second stage does not receive the adjusted signal, intermodulation between the adjusted signal and the first signal cancels at least a portion of the intermodulation between the first frequency and the second frequency from the output of the amplifier.Type: GrantFiled: December 17, 2018Date of Patent: February 25, 2020Assignee: Skyworks Solutions, Inc.Inventors: Yu Zhu, Dylan Charles Bartle, Oleksiy Klimashov, Paul T. DiCarlo
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Patent number: 10574192Abstract: A linearization circuit that reduces intermodulation distortion in an amplifier output receives a first signal that includes a first frequency and a second frequency and generates a difference signal having a frequency approximately equal to the difference of the first frequency and the second frequency. The linearization circuit generates an envelope signal based at least in part on a power level of the first signal and adjusts a magnitude of the difference signal based on the envelope signal. When the amplifier receives the first signal at an input terminal and the adjusted signal at a second terminal, intermodulation between the adjusted signal and the first signal cancels at least a portion of the intermodulation products that result from the intermodulation of the first frequency and the second frequency.Type: GrantFiled: December 19, 2018Date of Patent: February 25, 2020Assignee: Skyworks Solutions, Inc.Inventors: Yu Zhu, Boshi Jin, Steven Christopher Sprinkle, Florinel G. Balteanu, Oleksiy Klimashov, Dylan Charles Bartle, Paul T. DiCarlo
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Publication number: 20200052657Abstract: Envelope tracking can be employed to reduce power consumption of a power amplifier, but envelope tracking can introduce nonlinearities to a power amplifier. These nonlinearities can manifest themselves as noise at the output of the power amplifier. Embodiments described herein provide techniques for characterizing a parameter indicative of power amplifier noise when envelope tracking is employed. Measurement of this parameter can permit power amplifier designers to decide whether to forgo envelope tracking if a power amplifier is too susceptible to such noise, redesign the power amplifier to improve compatibility with envelope tracking, or to employ distortion compensation circuitry to reduce the noise output by the power amplifier. Counterintuitively, this distortion compensation circuitry may involve increasing the power, such as the envelope tracking power supply. However, increasing the power may be a desirable trade-off for increased linearity.Type: ApplicationFiled: June 24, 2019Publication date: February 13, 2020Inventors: Yu Zhu, Oleksiy Klimashov, Dylan C. Bartle, Paul T. DiCarlo
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Publication number: 20200014381Abstract: Disclosed herein are systems and methods for reducing intermodulation distortion (IMD) in switches using distorter circuits and voltage buffers. A switch circuit can include a switch arm with a stack of field-effect transistors (FETs), a distorter arm that is configured to act as a compensation circuit to compensate for non-linearities in the switch arm, and a voltage buffer that is configured to protect the distorter arm from large voltage swings when transitioning between ON and OFF states. The gate width of the distorter arm can be orders of magnitude smaller than the gate widths of the switch FETs. The gate width of the voltage buffer FETs can be larger than the distorter arm and smaller than the switch arm. The distorter arm is configured to compensate for the non-linearity effect generated by the switch arm.Type: ApplicationFiled: July 22, 2019Publication date: January 9, 2020Inventors: Yu Zhu, Hanching Fuh, Oleksiy Klimashov, Dylan Charles Bartle, Paul T. DiCarlo
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Patent number: 10505533Abstract: In semiconductor switches, the isolation can be limited by the capacitive coupling between the switch input and the switch output. Ultra-high isolation can be achieved by adding a coupled transmission line to the semiconductor switch. The coupled transmission line introduces inductive coupling, which cancels at least a part of the capacitive coupling between the switch input and the switch output.Type: GrantFiled: February 27, 2019Date of Patent: December 10, 2019Assignee: Skyworks Solutions, Inc.Inventors: Yu Zhu, Oleksiy Klimashov, Dylan Charles Bartle
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Patent number: 10447207Abstract: Aspects of this disclosure relate to a switching circuit with enhanced linearity. The switching circuit can include a switch and an envelope generator. The switch can receive an input signal, provide an output signal, and receive an envelope signal corresponding to an envelope of the input signal. The envelope generator can generate the envelope signal so as to cause intermodulation distortion in the output signal to be reduced to cause linearity of the switch to be improved.Type: GrantFiled: August 7, 2017Date of Patent: October 15, 2019Assignee: Skyworks Solutions, Inc.Inventors: Yu Zhu, Oleksiy Klimashov, Hailing Wang, Dylan Charles Bartle, Paul T. DiCarlo
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Patent number: 10381985Abstract: Envelope tracking can be employed to reduce power consumption of a power amplifier, but envelope tracking can introduce nonlinearities to a power amplifier. These nonlinearities can manifest themselves as noise at the output of the power amplifier. Embodiments described herein provide techniques for characterizing a parameter indicative of power amplifier noise when envelope tracking is employed. Measurement of this parameter can permit power amplifier designers to decide whether to forgo envelope tracking if a power amplifier is too susceptible to such noise, redesign the power amplifier to improve compatibility with envelope tracking, or to employ distortion compensation circuitry to reduce the noise output by the power amplifier. Counterintuitively, this distortion compensation circuitry may involve increasing the power, such as the envelope tracking power supply. However, increasing the power may be a desirable trade-off for increased linearity.Type: GrantFiled: September 11, 2018Date of Patent: August 13, 2019Assignee: Skyworks Solutions, Inc.Inventors: Yu Zhu, Oleksiy Klimashov, Dylan C. Bartle, Paul T. DiCarlo
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Patent number: 10361697Abstract: Disclosed herein are systems and methods for reducing intermodulation distortion (IMD) in switches using parallel distorter circuits. A switch circuit can include having a switch arm and a distorter arm that is configured to act as a compensation circuit to compensate for non-linearities in the switch arm. The switch circuit can include a plurality of FETs in the switch arm configured to provide switching functionality. The distorter arm is configured to compensate for a non-linearity effect generated by the FETs of the switch arm when it is in an ON state. The distorter arm is configured to compensate for the non-linearity effect generated by the switch arm independent of the frequency of the signal received by the switch arm. Various configurations of switch arms and distorter arms can be implemented to reduce harmonic distortion as well as intermodulation distortion.Type: GrantFiled: December 22, 2017Date of Patent: July 23, 2019Assignee: SKYWORKS SOLUTIONS, INC.Inventors: Yu Zhu, Hanching Fuh, Oleksiy Klimashov, Dylan Charles Bartle, Paul T. DiCarlo
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Publication number: 20190199344Abstract: In semiconductor switches, the isolation can be limited by the capacitive coupling between the switch input and the switch output. Ultra-high isolation can be achieved by adding a coupled transmission line to the semiconductor switch. The coupled transmission line introduces inductive coupling, which cancels at least a part of the capacitive coupling between the switch input and the switch output.Type: ApplicationFiled: February 27, 2019Publication date: June 27, 2019Inventors: Yu Zhu, Oleksiy Klimashov, Dylan Charles Bartle
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Publication number: 20190190462Abstract: A linearization circuit that reduces intermodulation distortion in an amplifier output receives a first signal that includes a first frequency and a second frequency and generates a difference signal having a frequency approximately equal to the difference of the first frequency and the second frequency. The linearization circuit generates an envelope signal based at least in part on a power level of the first signal and adjusts a magnitude of the difference signal based on the envelope signal. When the amplifier receives the first signal at an input terminal and the adjusted signal at a second terminal, intermodulation between the adjusted signal and the first signal cancels at least a portion of the intermodulation products that result from the intermodulation of the first frequency and the second frequency.Type: ApplicationFiled: December 19, 2018Publication date: June 20, 2019Inventors: Yu Zhu, Boshi Jin, Steven Christopher Sprinkle, Florinel G. Balteanu, Oleksiy Klimashov, Dylan Charles Bartle, Paul T. DiCarlo
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Patent number: 10263614Abstract: In semiconductor switches, the isolation can be limited by the capacitive coupling between the switch input and the switch output. Ultra-high isolation can be achieved by adding a coupled transmission line to the semiconductor switch. The coupled transmission line introduces inductive coupling, which cancels at least a part of the capacitive coupling between the switch input and the switch output.Type: GrantFiled: May 3, 2018Date of Patent: April 16, 2019Assignee: Skyworks Solutons, Inc.Inventors: Yu Zhu, Oleksiy Klimashov, Dylan Charles Bartle
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Publication number: 20190058446Abstract: Envelope tracking can be employed to reduce power consumption of a power amplifier, but envelope tracking can introduce nonlinearities to a power amplifier. These nonlinearities can manifest themselves as noise at the output of the power amplifier. Embodiments described herein provide techniques for characterizing a parameter indicative of power amplifier noise when envelope tracking is employed. Measurement of this parameter can permit power amplifier designers to decide whether to forgo envelope tracking if a power amplifier is too susceptible to such noise, redesign the power amplifier to improve compatibility with envelope tracking, or to employ distortion compensation circuitry to reduce the noise output by the power amplifier. Counterintuitively, this distortion compensation circuitry may involve increasing the power, such as the envelope tracking power supply. However, increasing the power may be a desirable trade-off for increased linearity.Type: ApplicationFiled: September 11, 2018Publication date: February 21, 2019Inventors: Yu Zhu, Oleksiy Klimashov, Dylan C. Bartle, Paul T. DiCarlo