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公开(公告)号：US10097233B2
公开(公告)日：2018-10-09
申请号：US14826316
申请日：2015-08-14
Applicant: ANALOG DEVICES GLOBAL
Inventor： Patrick Pratt
Abstract: Embodiments of full duplex radios are disclosed herein. For example, a radio may include: a first transmitter, a second transmitter, and a receiver. The first transmitter may be configured to receive an input signal, process the input signal to generate a first transmit signal, and transmit the first transmit signal. The second transmitter may be configured to receive the input signal, process the input signal to generate a second transmit signal, and couple the second transmit signal into an input path of the receiver. Leakage at the receiver may thus be reduced. Some embodiments of a radio may also include a base band correction circuit and means for reducing transmitter noise that leaks into the receiver.
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公开(公告)号：US09939476B2
公开(公告)日：2018-04-10
申请号：US14866036
申请日：2015-09-25
Applicant: ANALOG DEVICES GLOBAL
Inventor： Christian Steffen Birk , John A. Cleary , David Sayago Montilla , Elizabeth A. Lillis , Padraig O'Connor , Eoin E. English , Patrick Pratt , Kathleen Embrechts , Wim Rens , Jan Crols
CPC classification number: G01R27/2605 , B81B2201/0235 , B81C99/003
Abstract: Embodiments of the present invention may provide a method of measuring an unknown capacitance of a device. The method may comprise the steps of driving a test signal to a circuit system that includes a current divider formed by the device with unknown capacitance and a reference capacitor; mirroring a current developed in the reference capacitor to a second circuit system that includes a measurement impedance; measuring a voltage within the second circuit system; and deriving a capacitance of the unknown capacitance based on the measured voltage with reference to a capacitance of the reference capacitor and the measurement impedance.
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公开(公告)号：US09660675B2
公开(公告)日：2017-05-23
申请号：US14982701
申请日：2015-12-29
Applicant: Analog Devices Global
Inventor： Patrick Pratt
CPC classification number: H04B1/0475 , H03F1/3247 , H03F3/19 , H03F3/245 , H03F2200/451 , H03M1/12 , H03M1/66 , H04B2001/0425 , H04L25/03878 , H04L27/368
Abstract: Otherwise incompatible digital predistortion and uptilt can be used together, such as in a cable television or other cable communications system having a frequency-dependent signal loss at high frequencies. The predistortion can be used to compensate for a nonlinear gain compression of a power amplifier at higher frequencies. Additional uptilt and equalizer circuits can be included to address deleterious distortion effects that may otherwise arise by using predistortion and uptilt together. Training and adaptation of various components are described. Fine and coarse uptilt adjustments can be provided.
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公开(公告)号：US20170089966A1
公开(公告)日：2017-03-30
申请号：US14866036
申请日：2015-09-25
Applicant: ANALOG DEVICES GLOBAL
Inventor： Christian Steffen Birk , John A. Cleary , David Sayago Montilla , Elizabeth A. Lillis , Padraig O'Connor , Eoin E. English , Patrick Pratt , Kathleen Embrechts , Wim Rens , Jan Crols
IPC: G01R27/26
CPC classification number: G01R27/2605 , B81B2201/0235 , B81C99/003
Abstract: Embodiments of the present invention may provide a method of measuring an unknown capacitance of a device. The method may comprise the steps of driving a test signal to a circuit system that includes a current divider formed by the device with unknown capacitance and a reference capacitor; mirroring a current developed in the reference capacitor to a second circuit system that includes a measurement impedance; measuring a voltage within the second circuit system; and deriving a capacitance of the unknown capacitance based on the measured voltage with reference to a capacitance of the reference capacitor and the measurement impedance.
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公开(公告)号：US20190131934A1
公开(公告)日：2019-05-02
申请号：US15801232
申请日：2017-11-01
Applicant: ANALOG DEVICES GLOBAL UNLIMITED COMPANY
Inventor： Ahmed I. Khalil , Patrick Pratt
Abstract: Apparatus and methods provide predistortion for a phased array. Radio frequency (RF) sample signals from phased array elements are provided along return paths and are combined by a hardware RF combiner. Phase shifters are adjusted such that the RF sample signals are phase-aligned when combined. Adaptive adjustment of predistortion for the amplifiers of the phased array can be based on a signal derived from the combined RF sample signals.
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Patent Agency Ranking
公开(公告)号：US20180309465A1
公开(公告)日：2018-10-25
申请号：US16024303
申请日：2018-06-29
Applicant: Analog Devices Global
Inventor： Patrick Pratt
CPC classification number: H04B1/0475 , H03F1/3247 , H03F1/3294 , H03F3/195 , H03F2200/451 , H03F2201/3227 , H03F2201/3233 , H04B2001/0425
Abstract: Various examples are directed to systems and methods for digital predistortion (DPD). A linear digital predistortion (DPD) circuit may be programmed to generate a pre-distorted signal linear component based at least in part on a complex baseband signal. A nonlinear DPD circuit may be programmed to generate a pre-distorted signal nonlinear component based at least in part on the complex baseband signal. A mixer circuit programmed to generate a pre-distorted signal based at least in part on the pre-distorted signal linear component and the pre-distorted signal nonlinear component.
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公开(公告)号：US20180062675A1
公开(公告)日：2018-03-01
申请号：US15801874
申请日：2017-11-02
Applicant: Analog Devices Global
Inventor： Patrick Pratt , Peadar Antony Forbes , David J. McLaurin , Martin McCormick
IPC: H04B1/04
CPC classification number: H04B1/0475 , H04B1/525
Abstract: Transmitter noise cancellation may be applied on a channel by channel basis to active channels of an incoming radio frequency signal received at a receiver. A noise cancellation filter may be provided for each active channel in a predetermined signal band. Applying noise cancellation on a per active channel basis instead of to the entire receive band may substantially reduce the filtering requirement and number of filter coefficients or taps to save power and reduce manufacturing costs. Channelized transmitter noise cancellers, multi transmitter-receiver cross coupling cancellers, and hybrid full signal band and channelized transmitter noise cancellers are also provided.
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公开(公告)号：US11038474B2
公开(公告)日：2021-06-15
申请号：US15801232
申请日：2017-11-01
Applicant: ANALOG DEVICES GLOBAL UNLIMITED COMPANY
Inventor： Ahmed I. Khalil , Patrick Pratt
Abstract: Apparatus and methods provide predistortion for a phased array. Radio frequency (RF) sample signals from phased array elements are provided along return paths and are combined by a hardware RF combiner. Phase shifters are adjusted such that the RF sample signals are phase-aligned when combined. Adaptive adjustment of predistortion for the amplifiers of the phased array can be based on a signal derived from the combined RF sample signals.
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公开(公告)号：US10063265B2
公开(公告)日：2018-08-28
申请号：US15291898
申请日：2016-10-12
Applicant: Analog Devices Global
Inventor： Patrick Pratt , Claire Masterson , Justine Mary McCormack
IPC: H04B1/04 , H04L27/36 , H04B1/7163 , H03F1/32
CPC classification number: H04B1/0475 , H03F1/3247 , H03F1/3258 , H04B1/71635 , H04B2001/0425 , H04L27/368
Abstract: A digital pre-distortion system can inversely model a power amplifier of a system to linearize the transmitter. A complex baseband model for digital pre-distortion based on a narrowband signal assumption is unworkable for an ultra wide band Cable television application. Predistortion can use a true wide band model including real-valued basis terms, obtained from a real-valued signal. When raised to a power, both even and odd harmonics or both odd or even other non-linear terms are represented and negative frequency fold-over can be accounted for. A Hilbert transform can be applied. Compressed sensing can be used to reduce the number of basis terms in the true real wide band model to generate a sparse model. Sparse equalization can be added to improve the stability of the digital pre-distortion system.
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公开(公告)号：US10033413B2
公开(公告)日：2018-07-24
申请号：US15159532
申请日：2016-05-19
Applicant: Analog Devices Global
Inventor： Patrick Pratt
Abstract: Various examples are directed to systems and methods for digital predistortion (DPD). A linear digital predistortion (DPD) circuit may be programmed to generate a pre-distorted signal linear component based at least in part on a complex baseband signal. A nonlinear DPD circuit may be programmed to generate a pre-distorted signal nonlinear component based at least in part on the complex baseband signal. A mixer circuit programmed to generate a pre-distorted signal based at least in part on the pre-distorted signal linear component and the pre-distorted signal nonlinear component.
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