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公开(公告)号：US20250105792A1
公开(公告)日：2025-03-27
申请号：US18739614
申请日：2024-06-11
Applicant: Apple Inc.
Inventor： Stephan Henzler , Andreas Langer
Abstract: Wireless circuitry may include a radio-frequency amplifier configured to receive a power supply voltage, a load modulation circuit configured to generate a load control signal, and supply voltage error compensation circuitry configured to generate an error signal that is applied to the load control signal to produce a compensated load control signal. The compensated load control signal can be used to tune an adjustable load component of the radio-frequency amplifier. The power supply voltage may exhibit a piecewise constant waveform. The supply voltage error compensation circuitry can include a reference signal generator configured to generate a reference signal and a filter configured to generate a target signal based on the reference signal. The error signal can be computed based on a difference between the target signal and a sensed or estimated version of the power supply voltage received at the amplifier.
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公开(公告)号：US20240248509A1
公开(公告)日：2024-07-25
申请号：US18156952
申请日：2023-01-19
Applicant: Apple Inc.
Inventor： Stephan Henzler , Alexander Klinkan
Abstract: A radio-frequency amplifier can have a radio-frequency input configured to receive a radio-frequency signal and a control input for receiving a control signal. The radio-frequency signal can be generated using a first group of digital-to-analog converters (DACs), whereas the control signal can be generated using a second set of DACs. Data intended for the first group of DACs can be fed through a first set of retiming circuits and a first crossbar circuit. Data intended for the second group of DACs can be fed through a second set of retiming circuits and a second crossbar circuit. A low skew clocking interface and constant latency control and clock domain cross circuits can be employed to ensure that data streams arriving at the first group of DACs are time aligned with data streams arriving at the second group of DACs.
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公开(公告)号：US11277948B2
公开(公告)日：2022-03-15
申请号：US16299601
申请日：2019-03-12
Applicant: Apple Inc.
Inventor： Stephan Henzler , Eckehard Plaettner
Abstract: A circuit assembly includes a printed circuit board (PCB), and a power management arrangement positioned on and electrically coupled to the PCB. The power management arrangement includes a substrate, a power management circuit chip positioned on and electrically coupled to the substrate, and a shield can positioned over the substrate and providing electromagnetic shielding for the power management chip. The circuit assembly further includes a self-shielded coil positioned on and electrically coupled to the PCB, wherein the self-shielded coil is positioned adjacent to the power management arrangement.
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公开(公告)号：US11121684B2
公开(公告)日：2021-09-14
申请号：US16765668
申请日：2017-12-15
Applicant: Apple Inc.
Inventor： Stephan Henzler , Andreas Langer , Otto Schumacher
Abstract: A device for digital envelope tracking with dynamically changing voltage levels for a radio frequency (RF) power amplifier is disclosed. A power management unit generates a set of supply voltages for a power amplifier based on a control signal. A setpoint generator in the power management integrated circuit gradually increases or decreases a target voltage such that the set of supply voltages output from the voltage converter gradually increase or decrease in response to a gradual transition of the target voltage. A transceiver includes digital models for replicating a behavior of the setpoint generator and a voltage regulator in the voltage converter such that a signal pre-distortion unit may use an instantaneous voltage level for signal predistortion.
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公开(公告)号：US12034409B2
公开(公告)日：2024-07-09
申请号：US18159604
申请日：2023-01-25
Applicant: Apple Inc.
Inventor： Stephan Henzler , Andreas Langer
CPC classification number: H03F1/0288 , H03F3/211 , H04B1/0475 , H03F2200/451 , H04B2001/0416
Abstract: An electronic device may include wireless circuitry with a processor that generates baseband signals, an upconversion circuit that upconverts the baseband signals to radio-frequency signals, a power amplifier, an antenna, and a transmit filter with a frequency dependent filter response coupled between the output of the power amplifier and the antenna. To help mitigate the frequency dependent filter response, the wireless circuitry may further include predistortion circuitry having an amplifier load response estimator that implements a baseband model of the filter response, an amplifier non-linearity estimator that models the non-linear behavior of the amplifier, and a control signal generator for adjusting the power amplifier based on the output of the amplifier load response estimator and the amplifier non-linearity estimator.
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Patent Agency Ranking
公开(公告)号：US20240089876A1
公开(公告)日：2024-03-14
申请号：US17943400
申请日：2022-09-13
Applicant: Apple Inc.
Inventor： Andrea Camuffo , Andreas Langer , Guenther Hackl , Stephan Henzler
CPC classification number: H04W52/52 , H03G3/3042 , H04W52/36
Abstract: This disclosure is directed to compensating for gain drift due to switching the output power of a transmitter of an electronic device. In some cellular network applications, the transmit power level of a transmitter may be frequently adjusted from a low power level to a high power level. If the power level is not switched to the desired power level within a given interval, the transmission signal may be distorted. To enable the transmitter to reach a desired output power within the interval, the voltage supply of a power amplifier may be raised during a low power symbol, which may produce an undesirable gain increase. To mitigate or eliminate the low power symbol gain increase, a gain compensation signal may be introduced into the transmitter. The compensation signal may be adjusted and refined by implementing a power control loop, the power control loop may include a signal generator.
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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：US20240413845A1
公开(公告)日：2024-12-12
申请号：US18641901
申请日：2024-04-22
Applicant: Apple Inc.
Inventor： Bradley D Scoles , Christopher J Huber , Stephan Henzler , Qishan Yu
Abstract: An electronic device may include transceivers, radio-frequency front end (RFFE) circuitry, antennas, and a feedback receiver. The RFFE circuitry may include power amplifier (PA) modules that each transmits radio-frequency signals in a corresponding group of frequency bands. The modules may include power amplifiers, a band selection switch, and an antenna selection switch coupled to the band selection switch over a signal path. A radio-frequency coupler may be disposed on the signal path between the band selection switch and the antenna selection switch. A PA module may include a feedback receiver aggregation switch. The aggregation switch may be coupled to the radio-frequency coupler on its PA module and radio-frequency coupler(s) on other PA modules over feedback paths. The aggregation switch may pass coupled signals from the couplers to the feedback receiver for measurement.
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公开(公告)号：US20240284422A1
公开(公告)日：2024-08-22
申请号：US18423034
申请日：2024-01-25
Applicant: Apple Inc.
Inventor： Jochen O Schrattenecker , Stephan Henzler
IPC: H04W72/0453 , H04B7/0413
CPC classification number: H04W72/0453 , H04B7/0413
Abstract: User equipment may include a transmitter coupled to an antenna to enable the user equipment to transmit data with a base station and/or the wireless communication network. In certain instances, the user equipment may operate in a double multi-in multi-out (MIMO) configuration with or without switching. In the double MIMO with switching configuration, the user equipment may transmit data via two antennas on a first frequency band and switch to transmit additional data via the two antennas on a second frequency band. In the double MIMO without switching configuration, the user equipment may concurrently transmit data via two antennas on a first frequency band and transmit second data via two additional antennas on a second frequency band. Additionally, the user equipment may operate in a PC1.5 configuration using high power via two or more antennas.
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公开(公告)号：US20230353098A1
公开(公告)日：2023-11-02
申请号：US18159604
申请日：2023-01-25
Applicant: Apple Inc.
Inventor： Stephan Henzler , Andreas Langer
CPC classification number: H03F1/0288 , H03F3/211 , H04B1/0475 , H03F2200/451 , H04B2001/0416
Abstract: An electronic device may include wireless circuitry with a processor that generates baseband signals, an upconversion circuit that upconverts the baseband signals to radio-frequency signals, a power amplifier, an antenna, and a transmit filter with a frequency dependent filter response coupled between the output of the power amplifier and the antenna. To help mitigate the frequency dependent filter response, the wireless circuitry may further include predistortion circuitry having an amplifier load response estimator that implements a baseband model of the filter response, an amplifier non-linearity estimator that models the non-linear behavior of the amplifier, and a control signal generator for adjusting the power amplifier based on the output of the amplifier load response estimator and the amplifier non-linearity estimator.
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