Patents by Inventor Shiaw Wen Chang
Shiaw Wen Chang 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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Patent number: 11038543Abstract: Improved switched multiplexer architecture for supporting carrier aggregation in front-end applications. Front end architectures are disclosed that use two filters for a particular frequency band to allow for carrier aggregation using bands that at least partially overlap in frequency. An antenna switch module can be used to independently couple individual filters to an antenna to support a variety of carrier aggregation modes. Switches that connect to the two filters that split the particular frequency band can be configured to operate independently so as to only pass signals within a sub-band of the particular frequency band when operating in certain carrier aggregation modes.Type: GrantFiled: October 15, 2019Date of Patent: June 15, 2021Assignee: SKYWORKS SOLUTIONS, INC.Inventors: Shiaw Wen Chang, Brian Blu Duverneay, Sarah Shihui Xu, David Richard Pehlke
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Publication number: 20200106463Abstract: Improved switched multiplexer architecture for supporting carrier aggregation in front-end applications. Front end architectures are disclosed that use two filters for a particular frequency band to allow for carrier aggregation using bands that at least partially overlap in frequency. An antenna switch module can be used to independently couple individual filters to an antenna to support a variety of carrier aggregation modes. Switches that connect to the two filters that split the particular frequency band can be configured to operate independently so as to only pass signals within a sub-band of the particular frequency band when operating in certain carrier aggregation modes.Type: ApplicationFiled: October 15, 2019Publication date: April 2, 2020Inventors: Shiaw Wen CHANG, Brian Blu DUVERNEAY, Sarah Shiui XU, David Richard PEHLKE
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Patent number: 10447317Abstract: Improved switched multiplexer architecture for supporting carrier aggregation in front-end applications. A method is disclosed for providing a plurality of switchable paths between an assembly of filters and an antenna port. The method includes connecting a first filter of the filter assembly to the antenna port using a first switch of a switching circuit. The method also includes connecting a second filter of the filter assembly to the antenna port using a second switch of the switching circuit, the second switch independently operated from the first switch. The method also includes passing a first frequency range associated with a first transmission frequency range of a first band using the first filter. The method also includes passing a second frequency range associated with a first receive frequency range of the first band and with a second receive frequency range of a second band using the second filter.Type: GrantFiled: November 20, 2018Date of Patent: October 15, 2019Assignee: SKYWORKS SOLUTIONS, INC.Inventors: Shiaw Wen Chang, Brian Blu Duverneay, Sarah Shiui Xu, David Richard Pehlke
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Publication number: 20190097661Abstract: Improved switched multiplexer architecture for supporting carrier aggregation in front-end applications. A method is disclosed for providing a plurality of switchable paths between an assembly of filters and an antenna port. The method includes connecting a first filter of the filter assembly to the antenna port using a first switch of a switching circuit. The method also includes connecting a second filter of the filter assembly to the antenna port using a second switch of the switching circuit, the second switch independently operated from the first switch. The method also includes passing a first frequency range associated with a first transmission frequency range of a first band using the first filter. The method also includes passing a second frequency range associated with a first receive frequency range of the first band and with a second receive frequency range of a second band using the second filter.Type: ApplicationFiled: November 20, 2018Publication date: March 28, 2019Inventors: Shiaw Wen CHANG, Brian Blu DUVERNEAY, Sarah Shiui XU, David Richard PEHLKE
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Patent number: 10135469Abstract: Improved switched multiplexer architecture for supporting carrier aggregation in front-end applications. In some embodiments, an N-plexing system can include an assembly of filters configured to provide N filtered paths, and a switching circuit in communication with the assembly of filters. The switching circuit can be configured to provide a plurality of switchable paths between the assembly of filters and an antenna port to allow simultaneous operation between the N filtered paths and the antenna port. In some embodiments, N can be 4 for a quadruplexing system or 2 for a duplexing system, and such a system can be implemented in a front-end module (FEM) for wireless devices.Type: GrantFiled: April 10, 2017Date of Patent: November 20, 2018Assignee: SKYWORKS SOLUTIONS, INC.Inventors: Shiaw Wen Chang, Brian Blu Duverneay, Sarah Shiui Xu, David Richard Pehlke
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Patent number: 10069615Abstract: Improved switched multiplexer architecture for supporting carrier aggregation in front-end applications. In some embodiments, an N-plexing system can include an assembly of filters configured to provide N filtered paths, and a switching circuit in communication with the assembly of filters. The switching circuit can be configured to provide a plurality of switchable paths between the assembly of filters and an antenna port to allow simultaneous operation between the N filtered paths and the antenna port. In some embodiments, N can be 4 for a quadruplexing system or 2 for a duplexing system, and such a system can be implemented in a front-end module (FEM) for wireless devices.Type: GrantFiled: April 10, 2017Date of Patent: September 4, 2018Assignee: SKYWORKS SOLUTIONS, INC.Inventors: Shiaw Wen Chang, Brian Blu Duverneay, Sarah Shiui Xu, David Richard Pehlke
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Patent number: 9755670Abstract: Directional couplers for front end modules (FEMs) are disclosed that include a first port configured to receive a radio-frequency (RF) signal, a second port connected to the first port via a first transmission line and configured to provide an RF output signal, a third port connected to a second transmission line, the second transmission line being electromagnetically coupled to the first transmission line, and a fourth port connected to the second transmission line. The directional couplers further include an adaptive complex termination circuit connected to the fourth port and configured to provide an adaptive complex termination impedance selected to optimize combined performance of the directional couplers over multiple frequency bands.Type: GrantFiled: November 22, 2016Date of Patent: September 5, 2017Assignee: SKYWORKS SOLUTIONS, INC.Inventors: David Ruimin Chen, Shiaw Wen Chang, Ede Peter Enobakhare, Brian Blu DuVerneay
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Publication number: 20170244538Abstract: Improved switched multiplexer architecture for supporting carrier aggregation in front-end applications. In some embodiments, an N-plexing system can include an assembly of filters configured to provide N filtered paths, and a switching circuit in communication with the assembly of filters. The switching circuit can be configured to provide a plurality of switchable paths between the assembly of filters and an antenna port to allow simultaneous operation between the N filtered paths and the antenna port. In some embodiments, N can be 4 for a quadruplexing system or 2 for a duplexing system, and such a system can be implemented in a front-end module (FEM) for wireless devices.Type: ApplicationFiled: April 10, 2017Publication date: August 24, 2017Inventors: Shiaw Wen CHANG, Brian Blu Duverneay, Sarah Shiui XU, David Richard PEHLKE
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Publication number: 20170222665Abstract: Improved switched multiplexer architecture for supporting carrier aggregation in front-end applications. In some embodiments, an N-plexing system can include an assembly of filters configured to provide N filtered paths, and a switching circuit in communication with the assembly of filters. The switching circuit can be configured to provide a plurality of switchable paths between the assembly of filters and an antenna port to allow simultaneous operation between the N filtered paths and the antenna port. In some embodiments, N can be 4 for a quadruplexing system or 2 for a duplexing system, and such a system can be implemented in a front-end module (FEM) for wireless devices.Type: ApplicationFiled: April 10, 2017Publication date: August 3, 2017Inventors: Shiaw Wen CHANG, Brian Blu DUVERNEAY, Sarah Shiui XU, David Richard PEHLKE
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Patent number: 9621327Abstract: Improved switched multiplexer architecture for supporting carrier aggregation in front-end applications. In some embodiments, an N-plexing system can include an assembly of filters configured to provide N filtered paths, and a switching circuit in communication with the assembly of filters. The switching circuit can be configured to provide a plurality of switchable paths between the assembly of filters and an antenna port to allow simultaneous operation between the N filtered paths and the antenna port. In some embodiments, N can be 4 for a quadruplexing system or 2 for a duplexing system, and such a system can be implemented in a front-end module (FEM) for wireless devices.Type: GrantFiled: September 15, 2014Date of Patent: April 11, 2017Assignee: Skyworks Solutions, Inc.Inventors: Shiaw Wen Chang, Brian Blu Duverneay, Sarah Shihui Xu, David Richard Pehlke
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Publication number: 20170077966Abstract: Directional couplers for front end modules (FEMs) are disclosed that include a first port configured to receive a radio-frequency (RF) signal, a second port connected to the first port via a first transmission line and configured to provide an RF output signal, a third port connected to a second transmission line, the second transmission line being electromagnetically coupled to the first transmission line, and a fourth port connected to the second transmission line. The directional couplers further include an adaptive complex termination circuit connected to the fourth port and configured to provide an adaptive complex termination impedance selected to optimize combined performance of the directional couplers over multiple frequency bands.Type: ApplicationFiled: November 22, 2016Publication date: March 16, 2017Inventors: David Ruimin Chen, Shiaw Wen Chang, Ede Peter Enobakhare, Brian Blu DuVerneay
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Patent number: 9294055Abstract: A circuit for biasing a gallium arsenide (GaAs) power amplifier includes a reference voltage generator circuit implemented in a gallium arsenide (GaAs) material system, a field effect transistor (FET) bias circuit implemented in the gallium arsenide material system and adapted to receive an output of the reference voltage generator circuit and adapted to provide an output to a radio frequency (RF) amplifier stage.Type: GrantFiled: September 27, 2013Date of Patent: March 22, 2016Assignee: SKYWORKS SOLUTIONS, INC.Inventors: Ziv Alon, Shiaw Wen Chang, Andre Metzger
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Publication number: 20150349742Abstract: Directional couplers for front end modules (FEMs) are disclosed that include a first port configured to receive a radio-frequency (RF) signal, a second port connected to the first port via a first transmission line and configured to provide an RF output signal, and a third port connected to a second transmission line, the second transmission line coupled to the first transmission line. A directional coupler in accordance with the present disclosure may further include a termination circuit connected to the second transmission line and configured to provide a first impedance when the RF signal is within a first frequency band and provide a second impedance when the RF signal is within a second frequency band.Type: ApplicationFiled: May 28, 2015Publication date: December 3, 2015Inventors: David Ruimin CHEN, Shiaw Wen CHANG, Ede Peter ENOBAKHARE, Brian Blu DUVERNEAY
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Publication number: 20150133067Abstract: Improved switched multiplexer architecture for supporting carrier aggregation in front-end applications. In some embodiments, an N-plexing system can include an assembly of filters configured to provide N filtered paths, and a switching circuit in communication with the assembly of filters. The switching circuit can be configured to provide a plurality of switchable paths between the assembly of filters and an antenna port to allow simultaneous operation between the N filtered paths and the antenna port. In some embodiments, N can be 4 for a quadruplexing system or 2 for a duplexing system, and such a system can be implemented in a front-end module (FEM) for wireless devices.Type: ApplicationFiled: September 15, 2014Publication date: May 14, 2015Inventors: Shiaw Wen CHANG, Brian Blu DUVERNEAY, Sarah Shihui XU, David Richard PEHLKE
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Patent number: 8824991Abstract: A multi-mode power amplifier includes a high-power mode amplifier circuit, a mid-power mode amplifier circuit, and a low power amplifier circuit, where the low-power mode amplifier circuit comprises a plurality of independently selectable power cell/amplifier branches. The multi-mode power amplifiers selectively enable or disable amplifier branches to provide multiple levels of amplification. Selectively enabling certain of a plurality of split collector amplifier branches provides multiple low power and ultra-low power amplifier modes without the impedance mismatch or board layout problems associated with an RF switch.Type: GrantFiled: December 3, 2013Date of Patent: September 2, 2014Assignee: Skyworks Solutions, Inc.Inventors: Shiaw Wen Chang, Xuejun Chen, Guohao Zhang, Jing Sun, Piyou Zhang, Jinim Won
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Publication number: 20140097900Abstract: A circuit for biasing a gallium arsenide (GaAs) power amplifier includes a reference voltage generator circuit implemented in a gallium arsenide (GaAs) material system, a field effect transistor (FET) bias circuit implemented in the gallium arsenide material system and adapted to receive an output of the reference voltage generator circuit and adapted to provide an output to a radio frequency (RF) amplifier stage.Type: ApplicationFiled: September 27, 2013Publication date: April 10, 2014Applicant: SKYWORKS SOLUTIONS, INC.Inventors: Ziv Alon, Shiaw Wen Chang, Andre Metzger
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Publication number: 20140094129Abstract: A multi-mode power amplifier includes a high-power mode amplifier circuit, a mid-power mode amplifier circuit, and a low power amplifier circuit, where the low-power mode amplifier circuit comprises a plurality of independently selectable power cell/amplifier branches. The multi-mode power amplifiers selectively enable or disable amplifier branches to provide multiple levels of amplification. Selectively enabling certain of a plurality of split collector amplifier branches provides multiple low power and ultra-low power amplifier modes without the impedance mismatch or board layout problems associated with an RF switch.Type: ApplicationFiled: December 3, 2013Publication date: April 3, 2014Applicant: Skyworks Solutions, Inc.Inventors: Shiaw Wen Chang, Xuejun Chen, Guohao Zhang, Jing Sun, Piyou Zhang, Jinim Won
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Patent number: 8634789Abstract: A multi-mode power amplifier includes a high-power mode amplifier circuit, a mid-power mode amplifier circuit, and a low power amplifier circuit, where the low-power mode amplifier circuit comprises a plurality of independently selectable power cell/amplifier branches. The multi-mode power amplifiers selectively enable or disable amplifier branches to provide multiple levels of amplification. Selectively enabling certain of a plurality of split collector amplifier branches provides multiple low power and ultra-low power amplifier modes without the impedance mismatch or board layout problems associated with an RF switch.Type: GrantFiled: November 9, 2012Date of Patent: January 21, 2014Assignee: Skyworks Solutions, Inc.Inventors: Shiaw Wen Chang, Xuejun Chen, Guohao Zhang, Jing Sun, Piyou Zhang, Jinim Won
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Patent number: 6452454Abstract: A system is disclosed for improving the operation of a circuit having one or more semiconductor devices as temperature varies over the circuit's typical range of operating temperatures. In an environment of a current mirror, the invention can be used to reduce variation in the reference current as temperature changes. This is particularly desirable at low operating voltages. In one embodiment, the invention is configured as a current compensation module connected to a current mirror regulator node. At normal temperature, the current mirror reference current and the compensation module are configured to provide the desired amount of reference current to the current mirror. At temperatures above normal, the current compensation module automatically conducts more current than at normal temperature. At temperatures below normal, the current compensation module conducts less current than at normal temperature.Type: GrantFiled: November 13, 2000Date of Patent: September 17, 2002Assignee: Conexant Systems, Inc.Inventors: Eric Shawn Shapiro, Shiaw Wen Chang