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公开(公告)号：US20240250709A1
公开(公告)日：2024-07-25
申请号：US18157772
申请日：2023-01-20
Applicant: Apple Inc.
Inventor： Omar A Abdelatty , Kefei Wu , Woorim Shin , Yi Zhao
IPC: H04B1/40
CPC classification number: H04B1/40
Abstract: An electronic device may be provided with wireless circuitry that includes a transceiver. The transceiver may include a first signal path and a second signal path extending parallel to the first signal path. The first signal path may include a first chain of gain stages and a first inductive matching network. The second signal path may include a second chain of gain stages and a second inductive matching network. The first inductive matching network may be magnetically coupled to the second inductive matching network. The first and/or second signal path may include one or more crossovers that invert a polarity of the signals on the signal paths. The crossovers may help to mitigate the effects of the magnetic coupling between the first and second signal paths while allowing for minimal spatial separation between the signal paths.
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公开(公告)号：US20240063759A1
公开(公告)日：2024-02-22
申请号：US18466116
申请日：2023-09-13
Applicant: Apple Inc.
Inventor： Nitesh Singhal , Bo Yu , Kefei Wu
CPC classification number: H03F1/26 , H04B1/40 , H03F3/19 , H03F2200/451 , H03F2200/09 , H03F2200/294
Abstract: Wireless circuitry can have an antenna connected to a transmitting amplifier and a receiving amplifier. The wireless circuitry may be operable in a transmit mode during which only the transmitting amplifier is active and in a receive mode during which only the receiving amplifier is active. The transmitting amplifier may be connected to the antenna via a balun and a radio-frequency coupler without an intervening switch that is enabled during the transmit mode and disabled during the receive mode. The transmitting amplifier may include input transistors, cascode transistors, first switches configured to selectively decouple gate terminals of the cascode transistors from a bias voltage, output capacitors, and second switches configured to selectively decouple the output capacitors from a ground line. The first and second switches are turned on during the transmit mode and are turned off during the receive mode to increase an output impedance of the transmitting amplifier.
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Patent Agency Ranking
公开(公告)号：US20240063758A1
公开(公告)日：2024-02-22
申请号：US17892869
申请日：2022-08-22
Applicant: Apple Inc.
Inventor： Nitesh Singhal , Bo Yu , Kefei Wu
CPC classification number: H03F1/26 , H03F3/19 , H04B1/40 , H03F2200/451 , H03F2200/294 , H03F2200/09
Abstract: Wireless circuitry can have an antenna connected to a transmitting amplifier and a receiving amplifier. The wireless circuitry may be operable in a transmit mode during which only the transmitting amplifier is active and in a receive mode during which only the receiving amplifier is active. The transmitting amplifier may be connected to the antenna via a balun and a radio-frequency coupler without an intervening switch that is enabled during the transmit mode and disabled during the receive mode. The transmitting amplifier may include input transistors, cascode transistors, first switches configured to selectively decouple gate terminals of the cascode transistors from a bias voltage, output capacitors, and second switches configured to selectively decouple the output capacitors from a ground line. The first and second switches are turned on during the transmit mode and are turned off during the receive mode to increase an output impedance of the transmitting amplifier.
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公开(公告)号：US20230412135A1
公开(公告)日：2023-12-21
申请号：US17843507
申请日：2022-06-17
Applicant: Apple Inc.
Inventor： Kefei Wu , Morteza Nick , David M Signoff , Preeti S Mulage
CPC classification number: H03G3/3026 , H03F3/72 , H04B1/0053 , H03F2200/24 , H03G2201/103
Abstract: This disclosure is directed to reducing output voltage distortions of Variable Gain Amplifiers (VGAs). A VGA may include a number of amplifiers each providing a portion of a total gain of the VGA. For example, a processing circuit may select one or more of the amplifiers of the VGA to provide the output signal with a selected gain. However, the selected amplifiers may provide amplified signals with one or more distortion signals when receiving a bias voltage. Systems and methods are described to reduce or cancel the distortion signals of the selected amplifiers by providing a subthreshold nonzero bias voltage (e.g., a weak voltage) to the remaining (e.g., non-selected) amplifiers of the VGA. For example, the non-selected amplifiers may receive the weak voltage to provide distortion signals with similar voltage amplitude and out of phase compared to the distortion signals of the selected amplifiers.
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公开(公告)号：US20240250710A1
公开(公告)日：2024-07-25
申请号：US18475123
申请日：2023-09-26
Applicant: Apple Inc.
Inventor： Omar A Abdelatty , Kefei Wu , Woorim Shin , Yi Zhao
IPC: H04B1/40
CPC classification number: H04B1/40
Abstract: An electronic device may be provided with wireless circuitry that includes a transceiver. The transceiver may include a first signal path and a second signal path extending parallel to the first signal path. The first signal path may include a first chain of gain stages and a first inductive matching network. The second signal path may include a second chain of gain stages and a second inductive matching network. The first inductive matching network may be magnetically coupled to the second inductive matching network. The first and/or second signal path may include one or more crossovers that invert a polarity of the signals on the signal paths. The crossovers may help to mitigate the effects of the magnetic coupling between the first and second signal paths while allowing for minimal spatial separation between the signal paths.
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公开(公告)号：US20240250604A1
公开(公告)日：2024-07-25
申请号：US18099674
申请日：2023-01-20
Applicant: Apple Inc.
Inventor： David M. Signoff , Fei Wang , Kefei Wu , Song Hu , Morteza Nick , Xiang Guan
Abstract: Radio frequency (RF) transmitters of a device (aggressor device) may unintentionally transmit a high-power output signal to antennas of a receiving device (victim device). In some RF systems, a victim device may have no or little protection between its antennas and transistors in an integrated circuit. Performance or lifetime of the transistors may be negatively impacted due to large voltage swings that may result from the high-power signal received from the aggressor device. To prevent or mitigate impact to performance or lifetime of the transistors due to the large voltage swings, protection circuitry including switches and a direct current (DC) power source (e.g., a charge pump) may be implemented at an input of a receiver of the victim device to shunt the power from sensitive circuit components of the victim device.
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公开(公告)号：US20240022223A1
公开(公告)日：2024-01-18
申请号：US18476190
申请日：2023-09-27
Applicant: Apple Inc.
Inventor： Kefei Wu , Morteza Nick , David M. Signoff , Preeti S. Mulage
CPC classification number: H03G3/3026 , H03F3/72 , H04B1/0053 , H03G2201/103 , H03F2200/24
Abstract: This disclosure is directed to reducing output voltage distortions of Variable Gain Amplifiers (VGAs). A VGA may include a number of amplifiers each providing a portion of a total gain of the VGA. For example, a processing circuit may select one or more of the amplifiers of the VGA to provide the output signal with a selected gain. However, the selected amplifiers may provide amplified signals with one or more distortion signals when receiving a bias voltage. Systems and methods are described to reduce or cancel the distortion signals of the selected amplifiers by providing a subthreshold nonzero bias voltage (e.g., a weak voltage) to the remaining (e.g., non-selected) amplifiers of the VGA. For example, the non-selected amplifiers may receive the weak voltage to provide distortion signals with similar voltage amplitude and out of phase compared to the distortion signals of the selected amplifiers.
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