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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
申请人： Apple Inc.
发明人： Long Kong , Simone Gambini , Cristian Marcu , Nachum M. Kanovsky
摘要： 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：US11843413B1
公开(公告)日：2023-12-12
申请号：US17707778
申请日：2022-03-29
申请人： Apple Inc.
发明人： Long Kong , Chia-Hsiang Chen , Utku Seckin
IPC分类号： H04B1/7163 , H04B1/717
CPC分类号： H04B1/71635 , H04B1/7172 , H04B2201/7163
摘要： 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：US20240137067A1
公开(公告)日：2024-04-25
申请号：US18500959
申请日：2023-11-01
申请人： Apple Inc.
发明人： Long Kong , Chia-Hsiang Chen , Utku Seckin
IPC分类号： H04B1/7163 , H04B1/717
CPC分类号： H04B1/71635 , H04B1/7172 , H04B2201/7163
摘要： 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
申请人： Apple Inc.
发明人： Long Kong , Simone Gambini , Utku Seckin
摘要： 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：US20240235607A9
公开(公告)日：2024-07-11
申请号：US18500959
申请日：2023-11-02
申请人： Apple Inc.
发明人： Long Kong , Chia-Hsiang Chen , Utku Seckin
IPC分类号： H04B1/7163 , H04B1/717
CPC分类号： H04B1/71635 , H04B1/7172 , H04B2201/7163
摘要： 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
申请人： Apple Inc.
发明人： Long Kong , Simone Gambini , Utku Seckin
摘要： 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：US11139817B1
公开(公告)日：2021-10-05
申请号：US16855828
申请日：2020-04-22
申请人： Apple Inc.
发明人： Long Kong , Simone Gambini , Cristian Marcu , Nachum M. Kanovsky
摘要： 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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