Patents by Inventor Jinghang FENG
Jinghang FENG 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: 20240048101Abstract: Apparatus and methods for biasing power amplifiers are provided herein. In certain embodiments, a power amplifier includes a bipolar transistor having a base biased by a bias network having a reactance that controls an impedance at the transistor base to achieve substantially flat phase response over large dynamic power levels. For example, the bias network can have a frequency response, such as a high-pass or band-pass response, that reduces the impact of power level on phase distortion (AM/PM).Type: ApplicationFiled: July 18, 2023Publication date: February 8, 2024Inventors: Kunal Datta, Khaled A. Fayed, Edward James Anthony, Srivatsan Jayaraman, Jinghang Feng
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Patent number: 11750151Abstract: Apparatus and methods for biasing power amplifiers are provided herein. In certain embodiments, a power amplifier includes a bipolar transistor having a base biased by a bias network having a reactance that controls an impedance at the transistor base to achieve substantially flat phase response over large dynamic power levels. For example, the bias network can have a frequency response, such as a high-pass or band-pass response, that reduces the impact of power level on phase distortion (AM/PM).Type: GrantFiled: June 14, 2021Date of Patent: September 5, 2023Assignee: Skyworks Solutions, Inc.Inventors: Kunal Datta, Khaled A. Fayed, Edward James Anthony, Srivatsan Jayaraman, Jinghang Feng
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Publication number: 20230024830Abstract: Reconfigurable output baluns for wideband push-pull amplifiers are disclosed. In certain embodiments, a mobile device includes a transceiver that generates a first radio frequency signal of a first frequency band and a second radio frequency signal of a second frequency band, and a front-end system including a push-pull power amplifier that selectively amplifies one of the first radio frequency signal or the second radio frequency signal based on a band control signal. The push-pull power amplifier includes an input balun, an output balun, and a pair of amplifiers coupled between the input balun and the output balun. The band control signal is operable to control an impedance of the output balun.Type: ApplicationFiled: July 11, 2022Publication date: January 26, 2023Inventors: Kunal Datta, Hemin Wu, Shanshan Zhao, Sheikh Nijam Ali, Jinghang Feng
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Publication number: 20220376733Abstract: Apparatus and methods for reconfigurable power amplifiers are disclosed. In certain embodiments, a mobile device includes a transceiver configured to generate a first radio frequency signal of a first frequency band and a second radio frequency signal of a second frequency band, and a front-end system including a push-pull power amplifier configured to selectively amplify one of the first radio frequency signal or the second radio frequency signal based on a band control signal. The push-pull power amplifier includes an input balun, an output balun, and a pair of amplifiers coupled between the input balun and the output balun. The band control signal is operable to control an output capacitance of the pair of amplifiers.Type: ApplicationFiled: May 12, 2022Publication date: November 24, 2022Inventors: Kunal Datta, Jinghang Feng, Srivatsan Jayaraman
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Publication number: 20220376662Abstract: Apparatus and methods for reconfigurable power amplifiers are disclosed. In certain embodiments, a mobile device includes a transceiver configured to generate a first radio frequency signal of a first frequency band and a second radio frequency signal of a second frequency band, and a front-end system including a push-pull power amplifier configured to selectively amplify one of the first radio frequency signal or the second radio frequency signal based on a band control signal. The push-pull power amplifier includes an input balun, an output balun, and a pair of amplifiers coupled between the input balun and the output balun. The band control signal is operable to control an input capacitance of the pair of amplifiers.Type: ApplicationFiled: May 12, 2022Publication date: November 24, 2022Inventors: Kunal Datta, Jinghang Feng, Srivatsan Jayaraman
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Publication number: 20220006426Abstract: Apparatus and methods for biasing power amplifiers are provided herein. In certain embodiments, a power amplifier includes a bipolar transistor having a base biased by a bias network having a reactance that controls an impedance at the transistor base to achieve substantially flat phase response over large dynamic power levels. For example, the bias network can have a frequency response, such as a high-pass or band-pass response, that reduces the impact of power level on phase distortion (AM/PM).Type: ApplicationFiled: June 14, 2021Publication date: January 6, 2022Inventors: Kunal Datta, Khaled A. Fayed, Edward James Anthony, Srivatsan Jayaraman, Jinghang Feng
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Patent number: 11070171Abstract: Apparatus and methods for biasing power amplifiers are provided herein. In certain embodiments, a power amplifier includes a bipolar transistor having a base biased by a bias network having a reactance that controls an impedance at the transistor base to achieve substantially flat phase response over large dynamic power levels. For example, the bias network can have a frequency response, such as a high-pass or band-pass response, that reduces the impact of power level on phase distortion (AM/PM).Type: GrantFiled: January 9, 2020Date of Patent: July 20, 2021Assignee: Skyworks Solutions, Inc.Inventors: Kunal Datta, Khaled A. Fayed, Edward James Anthony, Srivatsan Jayaraman, Jinghang Feng
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Patent number: 10886953Abstract: Systems, devices and methods related to multi-band power amplifier. In some embodiments, a power amplifier module includes a power amplifier having an output stage and configured to receive a signal. The power amplifier module also includes a first programmable harmonic termination circuit in electrical communication with the output stage of the power amplifier. The first programmable harmonic termination circuit includes a first plurality of capacitors and a first plurality of switches, with at least one of the first plurality of capacitors being in electrical communication with at least one of the first plurality of switches. The power amplifier module further includes a controller configured to modify a configuration of the first plurality of switches of the first programmable harmonic termination circuit based at least in part on a second harmonic frequency of the signal.Type: GrantFiled: July 16, 2019Date of Patent: January 5, 2021Assignee: Skyworks Solutions, Inc.Inventors: Jinghang Feng, Shuqi Zheng, Netsanet Gebeyehu, Ying Shi, James Phillip Young
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Publication number: 20200228064Abstract: Apparatus and methods for biasing power amplifiers are provided herein. In certain embodiments, a power amplifier includes a bipolar transistor having a base biased by a bias network having a reactance that controls an impedance at the transistor base to achieve substantially flat phase response over large dynamic power levels. For example, the bias network can have a frequency response, such as a high-pass or band-pass response, that reduces the impact of power level on phase distortion (AM/PM).Type: ApplicationFiled: January 9, 2020Publication date: July 16, 2020Inventors: Kunal Datta, Khaled A. Fayed, Edward James Anthony, Srivatsan Jayaraman, Jinghang Feng
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Publication number: 20200162115Abstract: Systems, devices and methods related to multi-band power amplifier. In some embodiments, a power amplifier module includes a power amplifier having an output stage and configured to receive a signal. The power amplifier module also includes a first programmable harmonic termination circuit in electrical communication with the output stage of the power amplifier. The first programmable harmonic termination circuit includes a first plurality of capacitors and a first plurality of switches, with at least one of the first plurality of capacitors being in electrical communication with at least one of the first plurality of switches. The power amplifier module further includes a controller configured to modify a configuration of the first plurality of switches of the first programmable harmonic termination circuit based at least in part on a second harmonic frequency of the signal.Type: ApplicationFiled: July 16, 2019Publication date: May 21, 2020Inventors: Jinghang FENG, Shuqi ZHENG, Netsanet GEBEYEHU, Ying SHI, James Phillip YOUNG
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Patent number: 10642296Abstract: Apparatus and methods for programmable low dropout regulators for radio frequency (RF) electronics are provided herein. In certain configurations, a power amplifier system includes a multi-stage power amplifier that amplifies a radio frequency signal and includes a driver stage and an output stage. The power amplifier system further includes an envelope tracker that controls a supply voltage of the output stage in relation to an envelope of the radio frequency signal, and a programmable low dropout regulator that includes an output that provides a programmable supply voltage to the driver stage. The programmable low dropout regulator includes an output capacitor electrically connected to the output, a regulation transistor having a drain electrically connected to the output, and an alternative discharge circuit that discharges the output capacitor in response to programming the programmable supply voltage from a high voltage level to a low voltage level.Type: GrantFiled: April 19, 2019Date of Patent: May 5, 2020Assignee: Skyworks Solutions, Inc.Inventors: Netsanet Gebeyehu, Ying Shi, Jinghang Feng
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Patent number: 10587231Abstract: A power amplifier module that includes a power amplifier and a controller is presented herein. The power amplifier module may include a set of transistor stages and a plurality of bias circuits. At least one transistor stage from the set of transistor stages may be in electrical communication with a first bias circuit and a second bias circuit from the plurality of bias circuits. The first bias circuit can be configured to apply a first bias voltage to the at least one transistor stage and the second bias circuit can be configured to apply a second bias voltage to the at least one transistor stage. The controller may be configured to activate one of the first bias circuit and the second bias circuit.Type: GrantFiled: January 8, 2018Date of Patent: March 10, 2020Assignee: Syworks Solutions, Inc.Inventors: Ying Shi, Jinghang Feng
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Publication number: 20190243403Abstract: Apparatus and methods for programmable low dropout regulators for radio frequency (RF) electronics are provided herein. In certain configurations, a power amplifier system includes a multi-stage power amplifier that amplifies a radio frequency signal and includes a driver stage and an output stage. The power amplifier system further includes an envelope tracker that controls a supply voltage of the output stage in relation to an envelope of the radio frequency signal, and a programmable low dropout regulator that includes an output that provides a programmable supply voltage to the driver stage. The programmable low dropout regulator includes an output capacitor electrically connected to the output, a regulation transistor having a drain electrically connected to the output, and an alternative discharge circuit that discharges the output capacitor in response to programming the programmable supply voltage from a high voltage level to a low voltage level.Type: ApplicationFiled: April 19, 2019Publication date: August 8, 2019Inventors: Netsanet Gebeyehu, Ying Shi, Jinghang Feng
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Patent number: 10355724Abstract: Systems, devices and methods related to multi-band power amplifier. In some embodiments, a power amplifier module includes a power amplifier having an output stage and configured to receive a signal. The power amplifier module also includes a first programmable harmonic termination circuit in electrical communication with the output stage of the power amplifier. The first programmable harmonic termination circuit includes a first plurality of capacitors and a first plurality of switches, with at least one of the first plurality of capacitors being in electrical communication with at least one of the first plurality of switches. The power amplifier module further includes a controller configured to modify a configuration of the first plurality of switches of the first programmable harmonic termination circuit based at least in part on a second harmonic frequency of the signal.Type: GrantFiled: January 30, 2018Date of Patent: July 16, 2019Assignee: Skyworks Solutions, Inc.Inventors: Jinghang Feng, Shuqi Zheng, Netsanet Gebeyehu, Ying Shi, James Phillip Young
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Patent number: 10310527Abstract: Apparatus and methods for programmable low dropout (LDO) regulators for radio frequency (RF) electronics are provided herein. In certain configurations, an LDO regulator for generating a programmable output voltage includes a regulation field-effect transistor (FET) having a drain electrically connected to the LDO regulator's output, an error amplifier that controls a gate of the regulation FET, a feedback circuit that provides a feedback signal to an inverting input of the error amplifier, an output capacitor electrically connected to the LDO regulator's output, and an alternative discharge circuit. When the output voltage of the LDO regulator is programmed from a high voltage level to a low voltage level, the alternative discharge circuit activates to discharge the output capacitor to improve the LDO regulator's transient response.Type: GrantFiled: October 16, 2017Date of Patent: June 4, 2019Assignee: Skyworks Solutions, Inc.Inventors: Netsanet Gebeyehu, Ying Shi, Jinghang Feng
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Publication number: 20180234061Abstract: A power amplifier module that includes a power amplifier and a controller is presented herein. The power amplifier module may include a set of transistor stages and a plurality of bias circuits. At least one transistor stage from the set of transistor stages may be in electrical communication with a first bias circuit and a second bias circuit from the plurality of bias circuits. The first bias circuit can be configured to apply a first bias voltage to the at least one transistor stage and the second bias circuit can be configured to apply a second bias voltage to the at least one transistor stage. The controller may be configured to activate one of the first bias circuit and the second bias circuit.Type: ApplicationFiled: January 8, 2018Publication date: August 16, 2018Inventors: Ying Shi, Jinghang Feng
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Publication number: 20180227000Abstract: Systems, devices and methods related to multi-band power amplifier. In some embodiments, a power amplifier module includes a power amplifier having an output stage and configured to receive a signal. The power amplifier module also includes a first programmable harmonic termination circuit in electrical communication with the output stage of the power amplifier. The first programmable harmonic termination circuit includes a first plurality of capacitors and a first plurality of switches, with at least one of the first plurality of capacitors being in electrical communication with at least one of the first plurality of switches. The power amplifier module further includes a controller configured to modify a configuration of the first plurality of switches of the first programmable harmonic termination circuit based at least in part on a second harmonic frequency of the signal.Type: ApplicationFiled: January 30, 2018Publication date: August 9, 2018Inventors: Jinghang FENG, Shuqi ZHENG, Netsanet GEBEYEHU, Ying SHI, James Phillip YOUNG
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Publication number: 20180120881Abstract: Apparatus and methods for programmable low dropout (LDO) regulators for radio frequency (RF) electronics are provided herein. In certain configurations, an LDO regulator for generating a programmable output voltage includes a regulation field-effect transistor (FET) having a drain electrically connected to the LDO regulator's output, an error amplifier that controls a gate of the regulation FET, a feedback circuit that provides a feedback signal to an inverting input of the error amplifier, an output capacitor electrically connected to the LDO regulator's output, and an alternative discharge circuit. When the output voltage of the LDO regulator is programmed from a high voltage level to a low voltage level, the alternative discharge circuit activates to discharge the output capacitor to improve the LDO regulator's transient response.Type: ApplicationFiled: October 16, 2017Publication date: May 3, 2018Inventors: Netsanet Gebeyehu, Ying Shi, Jinghang Feng
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Patent number: 9887669Abstract: A power amplifier module that includes a power amplifier and a controller is presented herein. The power amplifier module may include a set of transistor stages and a plurality of bias circuits. At least one transistor stage from the set of transistor stages may be in electrical communication with a first bias circuit and a second bias circuit from the plurality of bias circuits. The first bias circuit can be configured to apply a first bias voltage to the at least one transistor stage and the second bias circuit can be configured to apply a second bias voltage to the at least one transistor stage. The controller may be configured to activate one of the first bias circuit and the second bias circuit.Type: GrantFiled: December 18, 2015Date of Patent: February 6, 2018Assignee: Skyworks Solutions, Inc.Inventors: Ying Shi, Jinghang Feng
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Patent number: 9882587Abstract: Systems, devices and methods related to multi-band power amplifier. In some embodiments, a power amplifier module includes a power amplifier having an output stage and configured to receive a signal. The power amplifier module also includes a first programmable harmonic termination circuit in electrical communication with the output stage of the power amplifier. The first programmable harmonic termination circuit includes a first plurality of capacitors and a first plurality of switches, with at least one of the first plurality of capacitors being in electrical communication with at least one of the first plurality of switches. The power amplifier module further includes a controller configured to modify a configuration of the first plurality of switches of the first programmable harmonic termination circuit based at least in part on a second harmonic frequency of the signal.Type: GrantFiled: March 30, 2016Date of Patent: January 30, 2018Assignee: Skyworks Solutions, Inc.Inventors: Jinghang Feng, Shuqi Zheng, Netsanet Gebeyehu, Ying Shi, James Phillip Young