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公开(公告)号：US20240088924A1
公开(公告)日：2024-03-14
申请号：US17941905
申请日：2022-09-09
Applicant: Apple Inc.
Inventor： Stephan Henzler , Nicholas Preyss , Jochen Schrattenecker , Andreas Langer , Alexander Klinkan , Christoph Hepp , Christoph Angerer
CPC classification number: H04B1/0458 , H04L5/0048 , H04W56/005 , H04B2001/0408
Abstract: Wireless circuitry can include a processor that generates a baseband signal, an upconversion circuit that upconverts the baseband signals to a radio-frequency signal, and an amplifier that amplifies the radio-frequency signal. A tunable delay circuit can be used to selectively delay generation of the radio-frequency signal or to delay generation of another signal intended for the radio-frequency amplifier. The tunable delay circuit can be controlled using a closed-loop delay adaptation scheme. A feedback receiver that is coupled to an output of the amplifier can be used to generate a demodulated signal. A delay error measurement circuit can be used to receive the demodulated signal, to detect a peak by monitoring when an envelope of the demodulated signal crosses a threshold level, to compute an amount of asymmetry in the detected peak, and to output a signal that is used to control the tunable delay circuit.
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公开(公告)号：US11817892B2
公开(公告)日：2023-11-14
申请号：US17964958
申请日：2022-10-13
Applicant: Apple Inc.
Inventor： Andreas Langer , Christoph Hepp , Andreas Menkhoff , Gunther Kraut
CPC classification number: H04B1/0475 , H03F1/3247 , H03F3/245 , H03F2200/102 , H03F2200/451 , H03F2201/3231 , H04B2001/0425
Abstract: Systems, circuitries, and methods for predistorting a digital signal in a transmit chain based on a predistortion function are provided. A method includes shifting a center frequency of an input signal by an offset to generate an adapted signal; predistorting the adapted signal based on a predistortion function to generate a predistorted adapted signal; reverting the shifting of the center frequency of the predistorted adapted signal by the offset to generate a predistorted signal; and causing transmission of the predistorted signal by a transmit chain.
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公开(公告)号：US20230034540A1
公开(公告)日：2023-02-02
申请号：US17964958
申请日：2022-10-13
Applicant: Apple Inc.
Inventor： Andreas Langer , Christoph Hepp , Andreas Menkhoff , Gunther Kraut
Abstract: Systems, circuitries, and methods for predistorting a digital signal in a transmit chain based on a predistortion function are provided. A method includes shifting a center frequency of an input signal by an offset to generate an adapted signal; predistorting the adapted signal based on a predistortion function to generate a predistorted adapted signal; reverting the shifting of the center frequency of the predistorted adapted signal by the offset to generate a predistorted signal; and causing transmission of the predistorted signal by a transmit chain.
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Patent Agency Ranking
公开(公告)号：US11777457B2
公开(公告)日：2023-10-03
申请号：US17559879
申请日：2021-12-22
Applicant: APPLE INC.
Inventor： Andreas Langer , Christoph Hepp
CPC classification number: H03F3/19 , H03F1/0216 , H03F1/0222 , H03F3/245 , H03G3/3042 , H03F2200/105 , H03F2200/336 , H03F2200/36 , H03F2200/451 , H03G2201/302 , H03G2201/307 , H04B1/04
Abstract: A circuit for generating a radio frequency signal is provided. The circuit includes an amplifier configured to generate a radio frequency signal based on a baseband signal. Further, the circuit includes a power supply configured to generate a variable supply voltage based on a control signal indicating a desired supply voltage, and to supply the variable supply voltage to the amplifier. The circuit further includes an envelope tracking circuit configured to generate the control signal based on a bandwidth of the baseband signal, and to supply the control signal to the power supply.
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公开(公告)号：US11502707B2
公开(公告)日：2022-11-15
申请号：US17230090
申请日：2021-04-14
Applicant: Apple Inc.
Inventor： Andreas Langer , Christoph Hepp , Andreas Menkhoff , Gunther Kraut
Abstract: Systems, circuitries, and methods for predistorting a digital signal in a transmit chain based on a predistortion function are provided. A method includes shifting a center frequency of an input signal by an offset to generate an adapted signal; predistorting the adapted signal based on a predistortion function to generate a predistorted adapted signal; reverting the shifting of the center frequency of the predistorted adapted signal by the offset to generate a predistorted signal; and causing transmission of the predistorted signal by a transmit chain.
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公开(公告)号：US20220115996A1
公开(公告)日：2022-04-14
申请号：US17559879
申请日：2021-12-22
Applicant: APPLE INC.
Inventor： Andreas Langer , Christoph Hepp
Abstract: A circuit for generating a radio frequency signal is provided. The circuit includes an amplifier configured to generate a radio frequency signal based on a baseband signal. Further, the circuit includes a power supply configured to generate a variable supply voltage based on a control signal indicating a desired supply voltage, and to supply the variable supply voltage to the amplifier. The circuit further includes an envelope tracking circuit configured to generate the control signal based on a bandwidth of the baseband signal, and to supply the control signal to the power supply.
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公开(公告)号：US11218121B2
公开(公告)日：2022-01-04
申请号：US15811860
申请日：2016-06-08
Applicant: Apple Inc.
Inventor： Andreas Langer , Christoph Hepp
Abstract: A circuit for generating a radio frequency signal is provided. The circuit includes an amplifier configured to generate a radio frequency signal based on a baseband signal. Further, the circuit includes a power supply configured to generate a variable supply voltage based on a control signal indicating a desired supply voltage, and to supply the variable supply voltage to the amplifier. The circuit further includes an envelope tracking circuit configured to generate the control signal based on a bandwidth of the baseband signal, and to supply the control signal to the power supply.
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公开(公告)号：US20210234564A1
公开(公告)日：2021-07-29
申请号：US17230090
申请日：2021-04-14
Applicant: Apple Inc.
Inventor： Andreas Langer , Christoph Hepp , Andreas Menkhoff , Gunther Kraut
Abstract: Systems, circuitries, and methods for predistorting a digital signal in a transmit chain based on a predistortion function are provided. A method includes shifting a center frequency of an input signal by an offset to generate an adapted signal; predistorting the adapted signal based on a predistortion function to generate a predistorted adapted signal; reverting the shifting of the center frequency of the predistorted adapted signal by the offset to generate a predistorted signal; and causing transmission of the predistorted signal by a transmit chain.
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