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公开(公告)号：US20240014833A1
公开(公告)日：2024-01-11
申请号：US18321454
申请日：2023-05-22
Applicant: Apple Inc.
Inventor： Stephan Henzler , Pedro Mirassol Tomé , Andreas Langer , Alexander Klinkan
CPC classification number: H04B1/0096 , H04B1/0089 , H04B1/0475 , H04B2001/0416
Abstract: An electronic device may include wireless circuitry. The wireless circuitry may include at least a digital predistortion circuit, an upconversion circuit, and a load-line modulated amplifier circuit. The digital predistortion circuit can be configured to receive a reference baseband signal from one or more processors and to selectively output a predistorted version of the reference baseband signal. The upconversion circuit can be configured to receive a signal from the digital predistortion circuit and to output a radio-frequency signal. The load-line modulated amplifier circuit can be configured to amplify the radio-frequency signal. The load-line modulated amplifier circuit can include an adjustable load component. The adjustable load component can have a constant impedance when an instantaneous signal amplitude of the reference baseband signal is within a first range and can be tuned to have a varying impedance when the instantaneous signal amplitude of the reference baseband signal is within a second range.
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公开(公告)号：US11828871B2
公开(公告)日：2023-11-28
申请号：US17150974
申请日：2021-01-15
Applicant: Apple Inc.
Inventor： Jochen Schrattenecker , Bernhard Sogl , Andreas Menkhoff , Joonhoi Hur , Harald Pretl , Christian Mayer , Andreas Langer , Rastislav Vazny
IPC: G01S7/40
CPC classification number: G01S7/4056 , G01S7/40 , G01S7/4073
Abstract: An electronic device may include radar circuitry. Control circuitry may calibrate the radar circuitry using a multi-tone calibration signal. A first mixer may upconvert the calibration signal for transmission by a transmit antenna. A de-chirp mixer may mix the calibration signal output by the first mixer with the calibration signal as received by a receive antenna or loopback path to produce a baseband multi-tone calibration signal. The baseband signal will be offset from DC by the frequency gap. This may prevent DC noise or other system effects from interfering with the calibration signal. The control circuitry may sweep the first mixer over the radio frequencies of operation of the radar circuitry to estimate the power droop and phase shift of the radar circuitry based on baseband calibration signal. Distortion circuitry may distort transmit signals used in spatial ranging operations to invert the estimated power droop and phase shift.
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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：US20230120605A1
公开(公告)日：2023-04-20
申请号：US18082809
申请日：2022-12-16
Applicant: Apple Inc.
Inventor： Andreas Langer , Thomas Bruder
IPC: H04B1/04 , H04B7/0413
Abstract: An apparatus for wireless communication is provided. The apparatus includes a processing circuit configured to receive data to be wirelessly transmitted within a predefined frequency range. Further, the processing circuit is configured to generate a first radio frequency transmit signal of a first frequency range based on the data, and to generate a second radio frequency transmit signal of a second frequency range based on the data. The first frequency range and the second frequency range are subranges of the predefined frequency range. The apparatus further includes a front-end circuit configured to supply the first radio frequency transmit signal to a first antenna, and to supply the second radio frequency transmit signal to a second antenna.
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Patent Agency Ranking
公开(公告)号：US11569849B2
公开(公告)日：2023-01-31
申请号：US16761421
申请日：2017-11-23
Applicant: Apple Inc.
Inventor： Andreas Langer , Thomas Bruder
Abstract: An apparatus for wireless communication is provided. The apparatus includes a processing circuit configured to receive data to be wirelessly transmitted within a predefined frequency range. Further, the processing circuit is configured to generate a first radio frequency transmit signal of a first frequency range based on the data, and to generate a second radio frequency transmit signal of a second frequency range based on the data. The first frequency range and the second frequency range are subranges of the predefined frequency range. The apparatus further includes a front-end circuit configured to supply the first radio frequency transmit signal to a first antenna, and to supply the second radio frequency transmit signal to a second antenna.
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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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