Patents by Inventor Seyed Mohammad Hossein Mohammadnezhad
Seyed Mohammad Hossein Mohammadnezhad 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: 20240030875Abstract: An electronic device may include wireless circuitry with a processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The amplifier circuitry may include non-linearity suppression circuitry that suppresses or reduces non-linear behavior of components such as a core amplification transistor and a degeneration inductor within the amplifier circuitry. The non-linearity suppression circuitry may include an intermodulation distortion suppression circuit having an auxiliary amplification transistor. The non-linearity suppression circuitry may include a frequency-selective filter coupled to the degeneration inductor.Type: ApplicationFiled: July 19, 2022Publication date: January 25, 2024Inventors: Seyed Mohammad Hossein Mohammadnezhad, Xi Yao, Aly Ismail
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Patent number: 11711105Abstract: An electronic device may include wireless circuitry with a baseband processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The low noise amplifier is operable in a non-carrier-aggregation (NCA) mode and a carrier aggregation (CA) mode. The low noise amplifier may include a first input stage, a second input stage, a complementary degeneration transformer, and an input impedance compensation circuit. During the NCA mode, the first input stage is turned on while the second input stage is turned off, the degeneration transformer is controlled to provide maximum inductance, and the compensation circuit is turned on to provide input matching. During the CA mode, the first and second input stages are turned on, the degeneration transformer is adjusted to provide less inductance, and the compensation circuit is turned off.Type: GrantFiled: September 16, 2021Date of Patent: July 25, 2023Assignee: Apple Inc.Inventors: Seyed Mohammad Hossein Mohammadnezhad, Aly Ismail, Xi Yao
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Patent number: 11664844Abstract: An electronic device may include wireless circuitry with a baseband processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The amplifier circuitry is operable in a non-carrier-aggregation mode and a carrier aggregation mode. The amplifier circuitry may include an input transformer that is coupled to multiple amplifier stages such as a common gate amplifier stage, a cascode amplifier stage, and a common source amplifier stage. The common gate amplifier stage may include switches for selectively activating a set of cross-coupled capacitors to help maintain input impedance matching in the non-carrier-aggregation mode and the carrier-aggregation mode.Type: GrantFiled: September 20, 2022Date of Patent: May 30, 2023Assignee: Apple Inc.Inventors: Seyed Mohammad Hossein Mohammadnezhad, Xi Yao, Aly Ismail
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Patent number: 11595075Abstract: An electronic device may include wireless circuitry with a baseband processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The amplifier circuitry is operable in a non-carrier-aggregation mode and a carrier aggregation mode. The amplifier circuitry may include an input transformer that is coupled to multiple amplifier stages such as a common gate amplifier stage, a cascode amplifier stage, and a common source amplifier stage. The common gate amplifier stage may include switches for selectively activating a set of cross-coupled capacitors to help maintain input impedance matching in the non-carrier-aggregation mode and the carrier-aggregation mode.Type: GrantFiled: June 7, 2021Date of Patent: February 28, 2023Assignee: Apple Inc.Inventors: Seyed Mohammad Hossein Mohammadnezhad, Xi Yao, Aly Ismail
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Publication number: 20230020706Abstract: An electronic device may include wireless circuitry with a baseband processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The amplifier circuitry is operable in a non-carrier-aggregation mode and a carrier aggregation mode. The amplifier circuitry may include an input transformer that is coupled to multiple amplifier stages such as a common gate amplifier stage, a cascode amplifier stage, and a common source amplifier stage. The common gate amplifier stage may include switches for selectively activating a set of cross-coupled capacitors to help maintain input impedance matching in the non-carrier-aggregation mode and the carrier-aggregation mode.Type: ApplicationFiled: September 20, 2022Publication date: January 19, 2023Inventors: Seyed Mohammad Hossein Mohammadnezhad, Xi Yao, Aly Ismail
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Patent number: 11394597Abstract: Methods, systems, and apparatuses provide a transmitter architecture that directly generates 4N-QAM constellation using a raw bit stream as input and that does not require a digital-to-analog converter (DAC) in the signal path.Type: GrantFiled: January 29, 2021Date of Patent: July 19, 2022Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Seyed Mohammad Hossein Mohammadnezhad, Huan Wang, Payam Heydari
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Publication number: 20220094313Abstract: An electronic device may include wireless circuitry with a baseband processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The amplifier circuitry is operable in a non-carrier-aggregation mode and a carrier aggregation mode. The amplifier circuitry may include an input transformer that is coupled to multiple amplifier stages such as a common gate amplifier stage, a cascode amplifier stage, and a common source amplifier stage. The common gate amplifier stage may include switches for selectively activating a set of cross-coupled capacitors to help maintain input impedance matching in the non-carrier-aggregation mode and the carrier-aggregation mode.Type: ApplicationFiled: June 7, 2021Publication date: March 24, 2022Inventors: Seyed Mohammad Hossein Mohammadnezhad, Xi Yao, Aly Ismail
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Publication number: 20220085840Abstract: An electronic device may include wireless circuitry with a baseband processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The low noise amplifier is operable in a non-carrier-aggregation (NCA) mode and a carrier aggregation (CA) mode. The low noise amplifier may include a first input stage, a second input stage, a complementary degeneration transformer, and an input impedance compensation circuit. During the NCA mode, the first input stage is turned on while the second input stage is turned off, the degeneration transformer is controlled to provide maximum inductance, and the compensation circuit is turned on to provide input matching. During the CA mode, the first and second input stages are turned on, the degeneration transformer is adjusted to provide less inductance, and the compensation circuit is turned off.Type: ApplicationFiled: September 16, 2021Publication date: March 17, 2022Inventors: Seyed Mohammad Hossein Mohammadnezhad, Aly Ismail, Xi Yao
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Patent number: 11159191Abstract: An electronic device may include wireless circuitry with a baseband processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The low noise amplifier is operable in a non-carrier-aggregation (NCA) mode and a carrier aggregation (CA) mode. The low noise amplifier may include a first input stage, a second input stage, a complementary degeneration transformer, and an input impedance compensation circuit. During the NCA mode, the first input stage is turned on while the second input stage is turned off, the degeneration transformer is controlled to provide maximum inductance, and the compensation circuit is turned on to provide input matching. During the CA mode, the first and second input stages are turned on, the degeneration transformer is adjusted to provide less inductance, and the compensation circuit is turned off.Type: GrantFiled: September 11, 2020Date of Patent: October 26, 2021Assignee: Apple Inc.Inventors: Seyed Mohammad Hossein Mohammadnezhad, Aly Ismail, Xi Yao
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Patent number: 11095334Abstract: An electronic device may include wireless circuitry with a baseband processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The amplifier circuitry is operable in a non-carrier-aggregation mode and a carrier aggregation mode. The amplifier circuitry may include an input transformer that is coupled to multiple amplifier stages such as a common gate amplifier stage, a cascode amplifier stage, and a common source amplifier stage. The common gate amplifier stage may include switches for selectively activating a set of cross-coupled capacitors to help maintain input impedance matching in the non-carrier-aggregation mode and the carrier-aggregation mode.Type: GrantFiled: September 22, 2020Date of Patent: August 17, 2021Assignee: Apple Inc.Inventors: Seyed Mohammad Hossein Mohammadnezhad, Xi Yao, Aly Ismail
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Publication number: 20210218614Abstract: Methods, systems, and apparatuses provide a transmitter architecture that directly generates 4N-QAM constellation using a raw bit stream as input and that does not require a digital-to-analog converter (DAC) in the signal path.Type: ApplicationFiled: January 29, 2021Publication date: July 15, 2021Inventors: Seyed Mohammad Hossein Mohammadnezhad, Huan Wang, Payam Heydari
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Patent number: 10243523Abstract: Design of ultra broadband transimpedance amplifiers (TIA) for optical fiber communications is disclosed. In one embodiment, a TIA comprises a gm-boosted dual-feedback common-base stage, a level shifter and an RC-degenerated common-emitter stage, and a first emitter-follower stage, wherein the first emitter follower stage is inductively degenerated. An output of the TIA is buffered using a second emitter-follower stage.Type: GrantFiled: October 4, 2017Date of Patent: March 26, 2019Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Payam Heydari, Seyed Mohammad Hossein Mohammadnezhad, Alireza Karimi Bidhendi, Michael M. Green, David Howard, Edward Preisler
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Publication number: 20180102749Abstract: Design of ultra broadband transimpedance amplifiers (TIA) for optical fiber communications is disclosed. In one embodiment, a TIA comprises a gm-boosted dual-feedback common-base stage, a level shifter and an RC-degenerated common-emitter stage, and a first emitter-follower stage, wherein the first emitter follower stage is inductively degenerated. An output of the TIA is buffered using a second emitter-follower stage.Type: ApplicationFiled: October 4, 2017Publication date: April 12, 2018Inventors: Payam Heydari, Seyed Mohammad Hossein Mohammadnezhad, Alireza Karimi Bidhendi, Michael M. Green, David Howard, Edward Preisler