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41.发明授权公开(公告)号：US10164593B1
公开(公告)日：2018-12-25
申请号：US15697940
申请日：2017-09-07
Applicant: Silicon Laboratories Inc.
Inventor： Navin Harwalkar , John M. Khoury
Abstract: Embodiments of power detector circuits and related methods to compensate for undesired DC offsets generated within power detector circuits are disclosed. Input signals having input frequencies are received and converted to a magnitude signal, and reference signals are also generated. The magnitude signal may include a DC component proportional to a power of the input signal along with undesired DC offsets. The reference signal may include a DC component proportional to a power of at least one input reference signal along with undesired DC offsets. To compensate for errors introduced by the DC offsets, a programmable digital input signal is determined in a calibration mode and then applied to reference circuitry in a normal mode to compensate for the DC offsets. For the calibration mode, a difference between the magnitude signal and the reference signal is compared to a threshold value to generate a power detection output signal.
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公开(公告)号：US20180054162A1
公开(公告)日：2018-02-22
申请号：US15238525
申请日：2016-08-16
Applicant: Silicon Laboratories Inc.
Inventor： Marty Pflum , Arup Mukherji , John M. Khoury
CPC classification number: H03B5/04 , G01R19/00 , G06F1/04 , H03B1/00 , H03B5/36 , H03B27/00 , H03L7/00 , H03L7/1976 , H03M3/30
Abstract: An apparatus includes a first oscillator to generate an output signal that has a first frequency. The apparatus further includes a second oscillator to generate an output signal that has a second frequency. The second frequency varies as a function of temperature. The apparatus further includes a controller that counts a number of cycles of the output signal of the second oscillator in order to determine whether to calibrate the first oscillator.
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公开(公告)号：US09823687B2
公开(公告)日：2017-11-21
申请号：US14978837
申请日：2015-12-22
Applicant: SILICON LABORATORIES INC.
Inventor： Arup Mukherji , John M. Khoury
Abstract: A technique includes using a first oscillator to clock operations of a radio of an integrated circuit (IC). The technique includes intermittently using the first oscillator to frequency tune a second oscillator of the IC.
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公开(公告)号：US20160233869A1
公开(公告)日：2016-08-11
申请号：US14616624
申请日：2015-02-06
Applicant: Silicon Laboratories Inc.
Inventor： John M. Khoury
CPC classification number: H03L7/099 , H04B1/10 , H04J3/06 , H04J3/0685
Abstract: In some embodiments, an integrated circuit may include a radio frequency synthesizer configured to provide a local oscillator (LO) signal at a selected frequency related to a frequency of interest. The integrated circuit may also include a re-clocking circuit having a first input to receive a clock signal having a first frequency, a second input to receive a local timing signal related to the LO signal, and an output. The re-clocking circuit may be configured to provide a local timing output signal that is a frequency adjusted version of the clock signal based upon the local re-clocking signal. The integrated circuit further may include a digital circuit including an input to receive the local timing output signal as a digital clock signal in a receive mode.
Abstract translation: 在一些实施例中，集成电路可以包括射频合成器，其被配置为以与感兴趣频率相关的选定频率提供本地振荡器（LO）信号。 集成电路还可以包括具有第一输入以接收具有第一频率的时钟信号的第一输入端，用于接收与该LO信号相关的本地定时信号的第二输入端和输出端的再计时电路。 重新计时电路可以被配置为基于本地重新计时信号来提供作为时钟信号的频率调整版本的本地定时输出信号。 集成电路还可以包括数字电路，其包括用于在接收模式下接收本地定时输出信号作为数字时钟信号的输入。
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公开(公告)号：US12127144B2
公开(公告)日：2024-10-22
申请号：US18215488
申请日：2023-06-28
Applicant: Silicon Laboratories Inc.
Inventor： John M. Khoury , Yan Zhou , Michael A. Wu , Wentao Li
CPC classification number: H04W56/0035 , H04W56/005 , H04W4/023
Abstract: In at least one embodiment, a method for measuring a distance between a first communications device including a first local oscillator and a second communications device including a second local oscillator includes unwrapping N phase values to generate N unwrapped phase values. N is an integer greater than one. Each of the N phase values indicate an instantaneous phase of a received signal. The method includes averaging the N unwrapped phase values to generate an average phase value. The method includes wrapping the average phase value to generate a final phase measurement of the first local oscillator with respect to the second local oscillator.
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Patent Agency Ranking
公开(公告)号：US11737038B2
公开(公告)日：2023-08-22
申请号：US17107316
申请日：2020-11-30
Applicant: Silicon Laboratories Inc.
Inventor： Michael A. Wu , Wentao Li , John M. Khoury , Yan Zhou
CPC classification number: H04W56/0035 , H04W56/005 , H04W56/0055 , H04W52/0287
Abstract: A method for communicating between a first radio frequency communications device including a first local oscillator and a second radio frequency communications device including a second local oscillator includes generating phase values based on samples of a received signal. Each of the phase values indicates an instantaneous phase of the received signal. The method includes unwrapping the phase values to generate unwrapped phase values. The method includes generating frequency offset estimates based on the unwrapped phase values. The method includes generating an average frequency offset estimate based on the unwrapped phase values. The method includes wrapping the average frequency offset estimate to generate a residual frequency offset estimate. The method includes adjusting the first local oscillator based on the residual frequency offset estimate, thereby reducing a frequency offset between the first local oscillator and the second local oscillator.
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公开(公告)号：US11545985B2
公开(公告)日：2023-01-03
申请号：US16221436
申请日：2018-12-14
Applicant: Silicon Laboratories Inc.
Inventor： John M. Khoury
Abstract: An apparatus includes a digitally controlled oscillator (DCO), which includes an inductor coupled in series with a first capacitor. The DCO further includes a second capacitor coupled in parallel with the series-coupled inductor and first capacitor, a first inverter coupled in parallel with the second capacitor, and a second inverter coupled back-to-back to the first inverter. The DCO further includes a digital-to-analog-converter (DAC) to vary a capacitance of the first capacitor.
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公开(公告)号：US20220337255A1
公开(公告)日：2022-10-20
申请号：US17855537
申请日：2022-06-30
Applicant: Silicon Laboratories Inc.
Inventor： John M. Khoury
Abstract: An apparatus includes a digitally controlled oscillator (DCO), which includes an inductor coupled in series with a first capacitor. The DCO further includes a second capacitor coupled in parallel with the series-coupled inductor and first capacitor, a first inverter coupled in parallel with the second capacitor, and a second inverter coupled back-to-back to the first inverter. The DCO further includes a digital-to-analog-converter (DAC) to vary a capacitance of the first capacitor.
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公开(公告)号：US20220337254A1
公开(公告)日：2022-10-20
申请号：US17855525
申请日：2022-06-30
Applicant: Silicon Laboratories Inc.
Inventor： John M. Khoury
Abstract: An apparatus includes a digitally controlled oscillator (DCO), which includes an inductor coupled in series with a first capacitor. The DCO further includes a second capacitor coupled in parallel with the series-coupled inductor and first capacitor, a first inverter coupled in parallel with the second capacitor, and a second inverter coupled back-to-back to the first inverter. The DCO further includes a digital-to-analog-converter (DAC) to vary a capacitance of the first capacitor.
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50.发明申请公开(公告)号：US20220209718A1
公开(公告)日：2022-06-30
申请号：US17587678
申请日：2022-01-28
Applicant: Silicon Laboratories Inc.
Inventor： Luigi Panseri , Mustafa H. Koroglu , Praveen Vangala , John M. Khoury
Abstract: An apparatus includes a radio-frequency (RF) circuit, which includes a power amplifier coupled to receive an RF input signal and to provide an RF output signal in response to a modified bias signal. The RF circuit further includes a bias path circuit coupled to modify a bias signal as a function of a characteristic of an input signal to generate the modified bias signal. The bias path circuit provides the modified bias signal to the power amplifier.
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