Patents by Inventor Andy Cheng Pang Wu
Andy Cheng Pang Wu 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: 20190214946Abstract: Apparatus and methods for multi-mode power amplifiers are provided herein. In certain configurations, a wireless device includes a multi-mode power amplifier including a plurality of amplification paths electrically connected in parallel with one another. The plurality of amplification paths includes a first amplification path including an input stage of a first stage type and an output stage of a second stage type, and a second amplification path including an output stage of the second stage type. The first stage type provides non-inverting gain and the second stage type provides inverting gain. The wireless device further includes a transceiver that provides a radio frequency signal to the multi-mode power amplifier, and that operates the multi-mode power amplifier in a selected power mode chosen from a plurality of power modes based on selectively activating one or more of the plurality of amplification paths.Type: ApplicationFiled: January 16, 2019Publication date: July 11, 2019Inventors: Andy Cheng Pang Wu, Younkyu Chung
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Patent number: 10218311Abstract: Apparatus and methods for multi-mode power amplifiers are provided herein. In certain configurations, a wireless device includes a multi-mode power amplifier including a plurality of amplification paths electrically connected in parallel with one another. The plurality of amplification paths includes a first amplification path including an input stage of a first stage type and an output stage of a second stage type, and a second amplification path including an output stage of the second stage type. The first stage type provides non-inverting gain and the second stage type provides inverting gain. The wireless device further includes a transceiver that provides a radio frequency signal to the multi-mode power amplifier, and that operates the multi-mode power amplifier in a selected power mode chosen from a plurality of power modes based on selectively activating one or more of the plurality of amplification paths.Type: GrantFiled: October 16, 2017Date of Patent: February 26, 2019Assignee: Skyworks Solutions, Inc.Inventors: Andy Cheng Pang Wu, Younkyu Chung
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Patent number: 10135408Abstract: Aspects of this disclosure relate to efficient power amplifiers, such as class-F power amplifiers. A power amplifier transistor can provide an amplified RF signal. A termination can be coupled to an output of the power amplifier transistor and configured to provide a short circuit at a second harmonic. In some instances, the termination circuit can provide an open circuit at a third harmonic. A resonant circuit can be coupled to the output terminal of the power amplifier transistor and configured to provide an open circuit at the third harmonic. In certain embodiments, an input termination circuit coupled to an input terminal of the power amplifier transistor can provide a short circuit at the second harmonic. The power amplifiers of this disclosure can be implemented, for example, in envelope tracking applications.Type: GrantFiled: October 17, 2016Date of Patent: November 20, 2018Assignee: Skyworks Solutions, Inc.Inventors: Haibo Cao, Andy Cheng Pang Wu, Yu-Jui Lin, Joel Richard King
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Patent number: 10063200Abstract: Feedback circuit for power amplifier. In some embodiments, a radio-frequency amplifier can include a bipolar junction transistor configured to amplify a signal, and having an input and an output. The radio-frequency amplifier can further include a feedback circuit implemented between the output and input of the bipolar junction transistor. The feedback circuit can include a parallel assembly of a field-effect transistor and a resistive element such that the resistive element is bypassed when the field-effect transistor is ON and an overall resistance of the feedback circuit includes the resistive element when the field-effect transistor is OFF. Such a feedback circuit can be configured to be capable of providing a plurality of resistance values between the output and input of the bipolar junction transistor to facilitate different gains of the bipolar junction transistor.Type: GrantFiled: March 21, 2017Date of Patent: August 28, 2018Assignee: Skyworks Solutions, Inc.Inventors: Andy Cheng Pang Wu, Yu-Jui Lin, Peter Phu Tran
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Publication number: 20180175814Abstract: Circuits and methods for biasing power amplifiers. In some embodiments, a power amplifier circuit can include a transistor having and input and an output, and configured to amplify a signal. The power amplifier circuit can further include a bias circuit configured to provide a bias signal to the input of the transistor. The power amplifier circuit can further include a switchable feed circuit implemented between the bias circuit and the input of the transistor, and configured to provide a plurality of different resistance values for the bias signal between the bias circuit and the input of the transistor.Type: ApplicationFiled: November 28, 2017Publication date: June 21, 2018Inventors: Andy Cheng Pang WU, Yu-Jui LIN, Florina Alexandra LEFTER-ELARABI
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Publication number: 20180123518Abstract: Apparatus and methods for multi-mode power amplifiers are provided herein. In certain configurations, a wireless device includes a multi-mode power amplifier including a plurality of amplification paths electrically connected in parallel with one another. The plurality of amplification paths includes a first amplification path including an input stage of a first stage type and an output stage of a second stage type, and a second amplification path including an output stage of the second stage type. The first stage type provides non-inverting gain and the second stage type provides inverting gain. The wireless device further includes a transceiver that provides a radio frequency signal to the multi-mode power amplifier, and that operates the multi-mode power amplifier in a selected power mode chosen from a plurality of power modes based on selectively activating one or more of the plurality of amplification paths.Type: ApplicationFiled: October 16, 2017Publication date: May 3, 2018Inventors: Andy Cheng Pang Wu, Younkyu Chung
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Patent number: 9831841Abstract: Switchable base feed circuit for radio-frequency (RF) power amplifiers. In some embodiments, an RF power amplifier (PA) circuit can include a transistor having a base, a collector, and an emitter, with the transistor being configured to amplify an RF signal. The PA circuit can further include a bias circuit configured to provide a base bias signal to the base of the transistor. The PA circuit can further include a switchable base feed circuit implemented between the bias circuit and the base of the transistor. The switchable base feed circuit can be configured to provide a plurality of different resistance values for the base bias signal between the bias circuit and the base of the transistor. Such a PA circuit can be implemented in products such as a die, a module, and a wireless device.Type: GrantFiled: June 28, 2014Date of Patent: November 28, 2017Assignee: Skyworks Solutions, Inc.Inventors: Andy Cheng Pang Wu, Yu-Jui Lin, Florina Alexandra Lefter-Elarabi
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Patent number: 9819310Abstract: Apparatus and methods for multi-mode power amplifiers are provided herein. In certain configurations, a wireless device includes a multi-mode power amplifier including a plurality of amplification paths electrically connected in parallel with one another. The plurality of amplification paths includes a first amplification path including an input stage of a first stage type and an output stage of a second stage type, and a second amplification path including an output stage of the second stage type. The first stage type provides non-inverting gain and the second stage type provides inverting gain. The wireless device further includes a transceiver that provides a radio frequency signal to the multi-mode power amplifier, and that operates the multi-mode power amplifier in a selected power mode chosen from a plurality of power modes based on selectively activating one or more of the plurality of amplification paths.Type: GrantFiled: September 12, 2016Date of Patent: November 14, 2017Assignee: SKYWORKS SOLUTIONS, INC.Inventors: Andy Cheng Pang Wu, Younkyu Chung
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Publication number: 20170302239Abstract: Feedback circuit for power amplifier. In some embodiments, a radio-frequency amplifier can include a bipolar junction transistor configured to amplify a signal, and having an input and an output. The radio-frequency amplifier can further include a feedback circuit implemented between the output and input of the bipolar junction transistor. The feedback circuit can include a parallel assembly of a field-effect transistor and a resistive element such that the resistive element is bypassed when the field-effect transistor is ON and an overall resistance of the feedback circuit includes the resistive element when the field-effect transistor is OFF. Such a feedback circuit can be configured to be capable of providing a plurality of resistance values between the output and input of the bipolar junction transistor to facilitate different gains of the bipolar junction transistor.Type: ApplicationFiled: March 21, 2017Publication date: October 19, 2017Inventors: Andy Cheng Pang WU, Yu-Jui LIN, Peter Phu TRAN
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Patent number: 9698740Abstract: Aspects of this disclosure relate to a mode linearization switch circuit that can adjust an effective impedance provided to an output of an amplifier. In an embodiment, an apparatus includes an amplifier configured to amplify a radio frequency (RF) signal and a mode linearization switch circuit electrically coupled to an output of the amplifier. The mode linearization switch circuit can include a capacitor, a switch in series with the capacitor, and a series LC circuit in parallel with the switch.Type: GrantFiled: July 6, 2015Date of Patent: July 4, 2017Assignee: Skyworks Solutions, Inc.Inventors: Yu-Jui Lin, Andy Cheng Pang Wu, Peter Phu Tran
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Publication number: 20170093339Abstract: Apparatus and methods for multi-mode power amplifiers are provided herein. In certain configurations, a wireless device includes a multi-mode power amplifier including a plurality of amplification paths electrically connected in parallel with one another. The plurality of amplification paths includes a first amplification path including an input stage of a first stage type and an output stage of a second stage type, and a second amplification path including an output stage of the second stage type. The first stage type provides non-inverting gain and the second stage type provides inverting gain. The wireless device further includes a transceiver that provides a radio frequency signal to the multi-mode power amplifier, and that operates the multi-mode power amplifier in a selected power mode chosen from a plurality of power modes based on selectively activating one or more of the plurality of amplification paths.Type: ApplicationFiled: September 12, 2016Publication date: March 30, 2017Inventors: Andy Cheng Pang Wu, Younkyu Chung
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Patent number: 9602064Abstract: Switchable feedback circuit for radio-frequency (RF) power amplifiers. In some embodiments, an RF power amplifier (PA) circuit can include a transistor having a base, a collector, and an emitter. The transistor can be configured to amplify an RF signal. The RF PA circuit can further include a switchable feedback circuit implemented between the collector and the base. The switchable feedback circuit can be configured to provide a plurality of resistance values between the collector and the base. Such a PA circuit can be implemented in products such as a die, a module, and a wireless device.Type: GrantFiled: June 28, 2014Date of Patent: March 21, 2017Assignee: Skyworks Solutions, Inc.Inventors: Andy Cheng Pang Wu, Yu-Jui Lin, Peter Phu Tran
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Publication number: 20170040958Abstract: Aspects of this disclosure relate to efficient power amplifiers, such as class-F power amplifiers. A power amplifier transistor can provide an amplified RF signal. A termination can be coupled to an output of the power amplifier transistor and configured to provide a short circuit at a second harmonic. In some instances, the termination circuit can provide an open circuit at a third harmonic. A resonant circuit can be coupled to the output terminal of the power amplifier transistor and configured to provide an open circuit at the third harmonic. In certain embodiments, an input termination circuit coupled to an input terminal of the power amplifier transistor can provide a short circuit at the second harmonic. The power amplifiers of this disclosure can be implemented, for example, in envelope tracking applications.Type: ApplicationFiled: October 17, 2016Publication date: February 9, 2017Inventors: Haibo Cao, Andy Cheng Pang Wu, Yu-Jui Lin, Joel Richard King
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Patent number: 9503025Abstract: Aspects of this disclosure relate to efficient power amplifiers, such as class-F power amplifiers. A power amplifier transistor can provide an amplified RF signal. A termination can be coupled to an output of the power amplifier transistor and configured to provide a short circuit at a second harmonic. In some instances, the termination circuit can provide an open circuit at a third harmonic. A resonant circuit can be coupled to the output terminal of the power amplifier transistor and configured to provide an open circuit at the third harmonic. In certain embodiments, an input termination circuit coupled to an input terminal of the power amplifier transistor can provide a short circuit at the second harmonic. The power amplifiers of this disclosure can be implemented, for example, in envelope tracking applications.Type: GrantFiled: March 27, 2015Date of Patent: November 22, 2016Assignee: Skyworks Solutions, Inc.Inventors: Haibo Cao, Andy Cheng Pang Wu, Yu-Jui Lin, Joel Richard King
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Publication number: 20160013767Abstract: Aspects of this disclosure relate to a mode linearization switch circuit that can adjust an effective impedance provided to an output of an amplifier. In an embodiment, an apparatus includes an amplifier configured to amplify a radio frequency (RF) signal and a mode linearization switch circuit electrically coupled to an output of the amplifier. The mode linearization switch circuit can include a capacitor, a switch in series with the capacitor, and a series LC circuit in parallel with the switch.Type: ApplicationFiled: July 6, 2015Publication date: January 14, 2016Inventors: Yu-Jui Lin, Andy Cheng Pang Wu, Peter Phu Tran
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Publication number: 20160013758Abstract: Aspects of this disclosure relate to efficient power amplifiers, such as class-F power amplifiers. A power amplifier transistor can provide an amplified RF signal. A termination can be coupled to an output of the power amplifier transistor and configured to provide a short circuit at a second harmonic. In some instances, the termination circuit can provide an open circuit at a third harmonic. A resonant circuit can be coupled to the output terminal of the power amplifier transistor and configured to provide an open circuit at the third harmonic. In certain embodiments, an input termination circuit coupled to an input terminal of the power amplifier transistor can provide a short circuit at the second harmonic. The power amplifiers of this disclosure can be implemented, for example, in envelope tracking applications.Type: ApplicationFiled: March 27, 2015Publication date: January 14, 2016Inventors: Haibo Cao, Andy Cheng Pang Wu, Yu-Jui Lin, Joel Richard King
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Publication number: 20150381126Abstract: Switchable base feed circuit for radio-frequency (RF) power amplifiers. In some embodiments, an RF power amplifier (PA) circuit can include a transistor having a base, a collector, and an emitter, with the transistor being configured to amplify an RF signal. The PA circuit can further include a bias circuit configured to provide a base bias signal to the base of the transistor. The PA circuit can further include a switchable base feed circuit implemented between the bias circuit and the base of the transistor. The switchable base feed circuit can be configured to provide a plurality of different resistance values for the base bias signal between the bias circuit and the base of the transistor. Such a PA circuit can be implemented in products such as a die, a module, and a wireless device.Type: ApplicationFiled: June 28, 2014Publication date: December 31, 2015Inventors: Andy Cheng Pang WU, Yu-Jui LIN, Florina Alexandra LEFTER-ELARABI
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Publication number: 20150381123Abstract: Switchable feedback circuit for radio-frequency (RF) power amplifiers. In some embodiments, an RF power amplifier (PA) circuit can include a transistor having a base, a collector, and an emitter. The transistor can be configured to amplify an RF signal. The RF PA circuit can further include a switchable feedback circuit implemented between the collector and the base. The switchable feedback circuit can be configured to provide a plurality of resistance values between the collector and the base. Such a PA circuit can be implemented in products such as a die, a module, and a wireless device.Type: ApplicationFiled: June 28, 2014Publication date: December 31, 2015Inventors: Andy Cheng Pang WU, Yu-Jui LIN, Peter Phu TRAN
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Patent number: 9054663Abstract: Apparatus and methods for reducing capacitive loading of a power amplifier supply control module are disclosed. In one embodiment, a method of power supply control in a power amplifier system includes controlling a voltage level of a supply voltage using a supply control module, amplifying a first radio frequency (RF) signal using a first power amplifier module, amplifying a second RF signal using a second power amplifier module, delivering the supply voltage to a first supply input of the first power amplifier module through a first resonant circuit, and delivering the supply voltage to a second supply input of the second power amplifier module through a second resonant circuit. The first resonant circuit includes a first inductor and a first capacitor electrically connected in parallel, and the second resonant circuit includes a second inductor and a second capacitor electrically connected in parallel.Type: GrantFiled: March 21, 2014Date of Patent: June 9, 2015Assignee: Skyworks Solutions, Inc.Inventors: Russ Alan Reisner, Daniel Lee Kaczman, Yu-Jui Lin, Andy Cheng Pang Wu
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Publication number: 20140203878Abstract: Apparatus and methods for reducing capacitive loading of a power amplifier supply control module are disclosed. In one embodiment, a method of power supply control in a power amplifier system includes controlling a voltage level of a supply voltage using a supply control module, amplifying a first radio frequency (RF) signal using a first power amplifier module, amplifying a second RF signal using a second power amplifier module, delivering the supply voltage to a first supply input of the first power amplifier module through a first resonant circuit, and delivering the supply voltage to a second supply input of the second power amplifier module through a second resonant circuit. The first resonant circuit includes a first inductor and a first capacitor electrically connected in parallel, and the second resonant circuit includes a second inductor and a second capacitor electrically connected in parallel.Type: ApplicationFiled: March 21, 2014Publication date: July 24, 2014Applicant: SKYWORKS SOLUTIONS, INC.Inventors: Russ Alan Reisner, Daniel Lee Kaczman, Yu-Jui Lin, Andy Cheng Pang Wu