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公开(公告)号：US20250080144A1
公开(公告)日：2025-03-06
申请号：US18460238
申请日：2023-09-01
Applicant: Apple Inc.
Inventor： Long Kong , Shinan Lu , Utku Seckin
Abstract: The present disclosure relates to compensating for temperature variation of a mixer. Embodiments herein may include the mixer, a calibration circuit coupled to the mixer, a replica mixer circuit coupled to the calibration circuit, and a temperature compensation circuit coupled to the calibration circuit. The replica mixer circuit may generate or be used to generate a reference voltage that varies with a common mode voltage and/or a threshold voltage of a replica mixer. The reference voltage may be applied to a resistor ladder of the calibration circuit to adjust a bias voltage and compensate for temperature variations. Further, the temperature compensation circuit may generate a temperature coefficient that may be applied to a current going through the calibration circuit to facilitate compensating for temperature variation.
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公开(公告)号：US20250080126A1
公开(公告)日：2025-03-06
申请号：US18460259
申请日：2023-09-01
Applicant: Apple Inc.
Inventor： Long Kong , Shinan Lu , Utku Seckin
Abstract: The present disclosure relates to compensating for temperature variation of a mixer. Embodiments herein may include performing a single-point Fast Fourier Transform (FFT) (or complex downconversion with DC average) for a number of samples to obtain a transform for each of the number of samples, phase aligning a set of phases associated with each transform, and averaging each transform to generate an analog-to-digital converter (ADC) power value. Further, the disclosed embodiments may include generating a compensation value based on the analog-to-digital converter power value and applying the compensation value to the calibration circuit of the mixer to compensate for a second-order intermodulation product.
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公开(公告)号：US20210336624A1
公开(公告)日：2021-10-28
申请号：US16855828
申请日：2020-04-22
Applicant: Apple Inc.
Inventor： Long Kong , Simone Gambini , Cristian Marcu , Nachum M. Kanovsky
Abstract: A computer system may periodically calibrate an oscillator subsystem, which includes a voltage-controlled oscillator circuit configured to generate an oscillator signal using code signal. In response to activation of a calibration mode, an iterative calibration operation may be performed on the voltage-controlled oscillator circuit. In some cases, performing a given iteration of the calibration operation includes determining a value of the code signal using a number of pulses in the oscillator signal sampled during a particular time period, along with previous values of the code signal and a slope of an error function associated with the difference between a desired frequency and a current frequency of the oscillator signal. In other cases, iterations may employ variable sampling times with error handling, in order to decrease the duration of the calibration operation while maintaining a target accuracy.
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公开(公告)号：US20250105808A1
公开(公告)日：2025-03-27
申请号：US18373057
申请日：2023-09-26
Applicant: Apple Inc.
Inventor： Long Kong , Simone Gambini
Abstract: Embodiments herein provide various apparatuses and techniques to reduce flicker noise and voltage offset from the buffers and/or amplifiers while avoiding additional alias components in a sampled-data receiver with chopper stabilization. Additionally, a direct-conversion baseband chain may be improved by disposing alternating current (AC) coupling circuits between chopper circuits in the transmitter or receiver chain to enable selection of a distinct common-mode level at each stage of the direct-conversion chain, while reducing or eliminating signal loss at direct current (DC) frequencies.
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公开(公告)号：US11843413B1
公开(公告)日：2023-12-12
申请号：US17707778
申请日：2022-03-29
Applicant: Apple Inc.
Inventor： Long Kong , Chia-Hsiang Chen , Utku Seckin
IPC: H04B1/7163 , H04B1/717
CPC classification number: H04B1/71635 , H04B1/7172 , H04B2201/7163
Abstract: A signal transmitter may include a waveform synthesis circuit and a signal transmission circuit. The waveform synthesis circuit may store values of a reference waveform for a selected channel of the signal transmitter, and use the stored values to generate values of reference waveforms for one or more other channels of the signal transmitter. The waveform synthesis circuit may further include a sampling boost circuit to generate one or more additional values for the reference waveforms. The waveform transmission circuit may generate signals for the channels of the signal transmitter based at least in part on the values of the reference waveforms, and transmit the signals via one or more antennas.
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Patent Agency Ranking
公开(公告)号：US20240137067A1
公开(公告)日：2024-04-25
申请号：US18500959
申请日：2023-11-01
Applicant: Apple Inc.
Inventor： Long Kong , Chia-Hsiang Chen , Utku Seckin
IPC: H04B1/7163 , H04B1/717
CPC classification number: H04B1/71635 , H04B1/7172 , H04B2201/7163
Abstract: A signal transmitter may include a waveform synthesis circuit and a signal transmission circuit. The waveform synthesis circuit may store values of a reference waveform for a selected channel of the signal transmitter, and use the stored values to generate values of reference waveforms for one or more other channels of the signal transmitter. The waveform synthesis circuit may further include a sampling boost circuit to generate one or more additional values for the reference waveforms. The waveform transmission circuit may generate signals for the channels of the signal transmitter based at least in part on the values of the reference waveforms, and transmit the signals via one or more antennas.
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公开(公告)号：US20230084706A1
公开(公告)日：2023-03-16
申请号：US17947739
申请日：2022-09-19
Applicant: Apple Inc.
Inventor： Long Kong , Simone Gambini , Utku Seckin
Abstract: An electronic device may include wireless circuitry with processor circuitry, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as low noise amplifier circuitry for amplifying received radio-frequency signals. The amplifier circuitry may include an amplifier having an input and an output, an adjustable load component coupled to the input, and an adjustable feedback component coupled across the input and output. A control circuit may simultaneously adjust the load and feedback components to tune the gain of the amplifier circuitry while maintaining the input resistance at a desired target level. The load and feedback components can be the same or different types of adjustable passive components.
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公开(公告)号：US20250105807A1
公开(公告)日：2025-03-27
申请号：US18373093
申请日：2023-09-26
Applicant: Apple Inc.
Inventor： Long Kong , Simone Gambini
Abstract: Embodiments herein provide various apparatuses and techniques to reduce flicker noise and voltage offset from the buffers and/or amplifiers while avoiding additional alias components in a sampled-data receiver with chopper stabilization. Additionally, a direct-conversion baseband chain may be improved by disposing alternating current (AC) coupling circuits between chopper circuits in the transmitter or receiver chain to enable selection of a distinct common-mode level at each stage of the direct-conversion chain, while reducing or eliminating signal loss at direct current (DC) frequencies.
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公开(公告)号：US20240235607A9
公开(公告)日：2024-07-11
申请号：US18500959
申请日：2023-11-02
Applicant: Apple Inc.
Inventor： Long Kong , Chia-Hsiang Chen , Utku Seckin
IPC: H04B1/7163 , H04B1/717
CPC classification number: H04B1/71635 , H04B1/7172 , H04B2201/7163
Abstract: A signal transmitter may include a waveform synthesis circuit and a signal transmission circuit. The waveform synthesis circuit may store values of a reference waveform for a selected channel of the signal transmitter, and use the stored values to generate values of reference waveforms for one or more other channels of the signal transmitter. The waveform synthesis circuit may further include a sampling boost circuit to generate one or more additional values for the reference waveforms. The waveform transmission circuit may generate signals for the channels of the signal transmitter based at least in part on the values of the reference waveforms, and transmit the signals via one or more antennas.
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公开(公告)号：US20230082519A1
公开(公告)日：2023-03-16
申请号：US17750909
申请日：2022-05-23
Applicant: Apple Inc.
Inventor： Long Kong , Simone Gambini , Utku Seckin
Abstract: An electronic device may include wireless circuitry with processor circuitry, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as low noise amplifier circuitry for amplifying received radio-frequency signals. The amplifier circuitry may include an amplifier having an input and an output, an adjustable load component coupled to the input, and an adjustable feedback component coupled across the input and output. A control circuit may simultaneously adjust the load and feedback components to tune the gain of the amplifier circuitry while maintaining the input resistance at a desired target level. The load and feedback components can be the same or different types of adjustable passive components.
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