Patents by Inventor Netsanet GEBEYEHU
Netsanet GEBEYEHU 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).
-
Publication number: 20230327609Abstract: An amplifier circuit comprising: a power amplifier; a bias control circuit coupled to the power amplifier and having a voltage sensor configured to sense a bias voltage to the power amplifier, the bias control circuit being configured to determine whether the bias voltage exceeds a threshold voltage; and a protection circuit coupled to the power amplifier, the bias control circuit being further configured to control the protection circuit to apply a clamping status to limit a power output of the power amplifier to a predetermined value in response to the bias control circuit determining that the bias voltage exceeds a threshold voltage.Type: ApplicationFiled: March 20, 2023Publication date: October 12, 2023Inventor: Netsanet Gebeyehu
-
Patent number: 11728773Abstract: Apparatus and methods for bias switching of power amplifiers are provided herein. In certain configurations, a power amplifier system includes a power amplifier that provides amplification to a radio frequency (RF) signal and a bias control circuit that biases the power amplifier. The power amplifier includes an amplification transistor that receives the RF signal at an input, and a first bias network and a second bias network each connected to the input. The bias control circuit includes a first switch, a first reference current source that provides the first reference current to the first bias network through the first switch, a second switch, and a second reference current source that provides the second reference current to the second bias network through the second switch.Type: GrantFiled: June 14, 2022Date of Patent: August 15, 2023Assignee: Skyworks Solutions, Inc.Inventors: Netsanet Gebeyehu, Srivatsan Jayaraman, Edward James Anthony
-
Patent number: 11671061Abstract: An amplifier system including a push-pull power amplifier having an input to receive a radio frequency (RF) input signal and an output, the push-pull power amplifier being configured to amplify the RF input signal and provide at the output an RF output signal that is an amplified version of the RF input signal, a switchable shunt capacitance switchably connected between a load-line connected to the output of the push-pull power amplifier and a reference potential, and a switch configured to selectively connect the switchable shunt capacitance to the reference potential and disconnect the switchable shunt capacitance from the reference potential to vary an impedance of load-line.Type: GrantFiled: September 25, 2019Date of Patent: June 6, 2023Assignee: SKYWORKS SOLUTIONS, INC.Inventors: Netsanet Gebeyehu, Tianzuo Xi, Sukchan Kang, Nan Ni
-
Publication number: 20230079623Abstract: Apparatus and method for detecting and clamping power of a power amplifier are disclosed. In certain embodiments, a power amplifier system includes a power amplifier that amplifies a radio frequency input signal to generate a radio frequency output signal, a bias circuit that controls a bias of the power amplifier, a radio frequency coupler that generates a radio frequency coupled signal based on the radio frequency output signal, a clamp that selectively clamps the bias of the power amplifier, and a power detector that controls the clamp based on the radio frequency coupled signal.Type: ApplicationFiled: July 29, 2022Publication date: March 16, 2023Inventor: Netsanet Gebeyehu
-
Publication number: 20220311386Abstract: Apparatus and methods for bias switching of power amplifiers are provided herein. In certain configurations, a power amplifier system includes a power amplifier that provides amplification to a radio frequency (RF) signal and a bias control circuit that biases the power amplifier. The power amplifier includes an amplification transistor that receives the RF signal at an input, and a first bias network and a second bias network each connected to the input. The bias control circuit includes a first switch, a first reference current source that provides the first reference current to the first bias network through the first switch, a second switch, and a second reference current source that provides the second reference current to the second bias network through the second switch.Type: ApplicationFiled: June 14, 2022Publication date: September 29, 2022Inventors: Netsanet Gebeyehu, Srivatsan Jayaraman, Edward James Anthony
-
Patent number: 11394347Abstract: Apparatus and methods for bias switching of power amplifiers are provided herein. In certain configurations, a power amplifier system includes a power amplifier that provides amplification to a radio frequency (RF) signal, a power management circuit that controls a voltage level of a supply voltage of the power amplifier, and a bias control circuit that biases the power amplifier. The power management circuit is operable in multiple supply control modes, such as an average power tracking (APT) mode and an envelope tracking (ET) mode. The bias control circuit is configured to switch a bias of the power amplifier based on the supply control mode of the power management circuit.Type: GrantFiled: February 23, 2021Date of Patent: July 19, 2022Assignee: Skyworks Solutions, Inc.Inventors: Netsanet Gebeyehu, Srivatsan Jayaraman, Edward James Anthony
-
Publication number: 20220014152Abstract: Power amplifiers with supply capacitor switching are provided herein. In certain configurations, a power amplifier system includes a power amplifier that provides amplification to a radio frequency (RF) signal, a power management circuit that controls a voltage level of a supply voltage of the power amplifier, a supply capacitor, and a silicon-on-insulator (SOI) switch in series with the supply capacitor between the supply voltage and the a reference voltage, such as ground. The power management circuit is operable in multiple supply control modes including, for example, an average power tracking (APT) mode and an envelope tracking (ET) mode. Additionally, the SOI switch is controlled based on the supply control mode of the power management circuit.Type: ApplicationFiled: June 30, 2021Publication date: January 13, 2022Inventors: Netsanet Gebeyehu, Weiya Gong, Shao-Min Hsu
-
Publication number: 20210184632Abstract: Apparatus and methods for bias switching of power amplifiers are provided herein. In certain configurations, a power amplifier system includes a power amplifier that provides amplification to a radio frequency (RF) signal, a power management circuit that controls a voltage level of a supply voltage of the power amplifier, and a bias control circuit that biases the power amplifier. The power management circuit is operable in multiple supply control modes, such as an average power tracking (APT) mode and an envelope tracking (ET) mode. The bias control circuit is configured to switch a bias of the power amplifier based on the supply control mode of the power management circuit.Type: ApplicationFiled: February 23, 2021Publication date: June 17, 2021Inventors: Netsanet Gebeyehu, Srivatsan Jayaraman, Edward James Anthony
-
Patent number: 10958218Abstract: Apparatus and methods for bias switching of power amplifiers are provided herein. In certain configurations, a power amplifier system includes a power amplifier that provides amplification to a radio frequency (RF) signal, a power management circuit that controls a voltage level of a supply voltage of the power amplifier, and a bias control circuit that biases the power amplifier. The power management circuit is operable in multiple supply control modes, such as an average power tracking (APT) mode and an envelope tracking (ET) mode. The bias control circuit is configured to switch a bias of the power amplifier based on the supply control mode of the power management circuit.Type: GrantFiled: May 6, 2020Date of Patent: March 23, 2021Assignee: Skyworks Solutions, Inc.Inventors: Netsanet Gebeyehu, Srivatsan Jayaraman, Edward James Anthony
-
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
-
Publication number: 20200336108Abstract: Apparatus and methods for bias switching of power amplifiers are provided herein. In certain configurations, a power amplifier system includes a power amplifier that provides amplification to a radio frequency (RF) signal, a power management circuit that controls a voltage level of a supply voltage of the power amplifier, and a bias control circuit that biases the power amplifier. The power management circuit is operable in multiple supply control modes, such as an average power tracking (APT) mode and an envelope tracking (ET) mode. The bias control circuit is configured to switch a bias of the power amplifier based on the supply control mode of the power management circuit.Type: ApplicationFiled: May 6, 2020Publication date: October 22, 2020Inventors: Netsanet Gebeyehu, Srivatsan Jayaraman, Edward James Anthony
-
Patent number: 10666200Abstract: Apparatus and methods for bias switching of power amplifiers are provided herein. In certain configurations, a power amplifier system includes a power amplifier that provides amplification to a radio frequency (RF) signal, a power management circuit that controls a voltage level of a supply voltage of the power amplifier, and a bias control circuit that biases the power amplifier. The power management circuit is operable in multiple supply control modes, such as an average power tracking (APT) mode and an envelope tracking (ET) mode. The bias control circuit is configured to switch a bias of the power amplifier based on the supply control mode of the power management circuit.Type: GrantFiled: March 30, 2018Date of Patent: May 26, 2020Assignee: Skyworks Solutions, Inc.Inventors: Netsanet Gebeyehu, Srivatsan Jayaraman, Edward James Anthony
-
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
-
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
-
Publication number: 20200099348Abstract: An amplifier system including a push-pull power amplifier having an input to receive a radio frequency (RF) input signal and an output, the push-pull power amplifier being configured to amplify the RF input signal and provide at the output an RF output signal that is an amplified version of the RF input signal, a switchable shunt capacitance switchably connected between a load-line connected to the output of the push-pull power amplifier and a reference potential, and a switch configured to selectively connect the switchable shunt capacitance to the reference potential and disconnect the switchable shunt capacitance from the reference potential to vary an impedance of load-line.Type: ApplicationFiled: September 25, 2019Publication date: March 26, 2020Inventors: Netsanet Gebeyehu, Tianzuo Xi, Sukchan Kang, Nan Ni
-
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
-
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
-
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
-
Publication number: 20180316311Abstract: Apparatus and methods for bias switching of power amplifiers are provided herein. In certain configurations, a power amplifier system includes a power amplifier that provides amplification to a radio frequency (RF) signal, a power management circuit that controls a voltage level of a supply voltage of the power amplifier, and a bias control circuit that biases the power amplifier. The power management circuit is operable in multiple supply control modes, such as an average power tracking (APT) mode and an envelope tracking (ET) mode. The bias control circuit is configured to switch a bias of the power amplifier based on the supply control mode of the power management circuit.Type: ApplicationFiled: March 30, 2018Publication date: November 1, 2018Inventors: Netsanet Gebeyehu, Srivatsan Jayaraman, Edward James Anthony
-
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