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公开(公告)号：US20170141736A1
公开(公告)日：2017-05-18
申请号：US15085477
申请日：2016-03-30
Applicant: Analog Devices Global
Inventor： Patrick Pratt , Joseph Bradford Brannon , Ronald Dale Turner
CPC classification number: H03F1/0222 , H03F1/3247 , H03F3/19 , H03F3/21 , H03F3/245 , H03F2200/102 , H03F2200/165 , H03F2200/336 , H03F2200/36 , H03F2200/411 , H03F2200/451 , H03F2200/504 , H03K5/15046 , H04B1/0475
Abstract: An envelope tracking scheme can be used, such as to modulate a supply node of a power amplifier circuit to improve efficiency. For example, a magnitude or amplitude envelope of a signal to be modulated can be scaled and used to drive a node, such as a drain, of the power amplifier circuit. An envelope tracking signal can be generated such as having a bandwidth that is compressed as compared to a full-bandwidth envelope signal. A peak-value “look ahead” technique can be used, for example, so that amplitude compression or clipping of the transmit signal is suppressed when the bandwidth-compressed envelope tracking signal is used to modulate a supply node of the power amplifier used to amplify the transmit signal.
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公开(公告)号：US20160119019A1
公开(公告)日：2016-04-28
申请号：US14826316
申请日：2015-08-14
Applicant: ANALOG DEVICES GLOBAL
Inventor： Patrick Pratt
CPC classification number: H04B7/0617 , H04B1/525 , H04L5/1461 , H04L25/00 , H04W4/70
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.
Abstract translation: 全双工无线电的实施例在此公开。 例如，无线电可以包括：第一发射机，第二发射机和接收机。 第一发射机可以被配置为接收输入信号，处理输入信号以产生第一发射信号，并发射第一发射信号。 第二发射机可以被配置为接收输入信号，处理输入信号以产生第二发射信号，并将第二发射信号耦合到接收机的输入路径中。 因此可能会降低接收机的泄漏。 无线电的一些实施例还可以包括基带校正电路和用于减少泄漏到接收机中的发射机噪声的装置。
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公开(公告)号：US10320340B1
公开(公告)日：2019-06-11
申请号：US15868295
申请日：2018-01-11
Applicant: Analog Devices Global Unlimited Company
Inventor： Patrick Pratt , David Jennings
Abstract: Various examples are directed to a digital predistortion (DPD) circuit comprising a DPD actuator circuit, a DPD feedback frequency-shaping filter, a basis matrix generator circuit, a basis matrix frequency-shaping filter, and a DPD adaption circuit. The DPD actuator circuit may generate a predistorted signal based at least in part on an input signal and a set of frequency-shaped DPD parameters. The DPD feedback frequency-shaping filter may filter a DPD feedback signal to generate a frequency-shaped DPD feedback signal. A passband of the DPD feedback frequency-shaping filter may include substantially all of a bandwidth of the input signal and exclude a distortion term outside the bandwidth of the input signal. The basis matrix generator may generate a basis matrix based at least in part on a power amplifier feedback signal The basis matrix frequency-shaping filter may generate a frequency-shaped basis matrix based at least in part on the basis matrix. The DPD adaption circuit may be configured to generate the set of frequency-shaped DPD parameters based at least in part on the frequency-shaped basis matrix and the frequency-shaped DPD feedback signal.
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公开(公告)号：US10298276B2
公开(公告)日：2019-05-21
申请号：US15372723
申请日：2016-12-08
Applicant: Analog Devices Global
Inventor： Patrick Pratt , Michael O'Brien
Abstract: Power amplifier circuits can behave in a non-linear manner particularly when operated to produce output signal swings approaching an amplifier saturation region. A pre-distortion signal can be applied to a signal to be transmitted to compensate for such power amplifier non-linearity. In applications where two or more transmitter power amplifiers are used, a beam-former can be configured to modify a digitally pre-distorted transmission signal by applying respective beam-forming weighting factors to the digitally pre-distorted transmission signal to provide input transmission signals for respective ones of the power amplifier circuits. The pre-distortion signal can be established at least in part using one or more of a sensed or estimated representation of a transmitted beam formed by spatially aggregating transmitted outputs from the two or more power amplifier circuits. In this manner, power amplifier efficiency can be enhanced without entirely separate pre-distortion compensation for each of the power amplifier circuits.
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公开(公告)号：US10250194B2
公开(公告)日：2019-04-02
申请号：US15085477
申请日：2016-03-30
Applicant: Analog Devices Global
Inventor： Patrick Pratt , Joseph Bradford Brannon , Ronald Dale Turner
Abstract: An envelope tracking scheme can be used, such as to modulate a supply node of a power amplifier circuit to improve efficiency. For example, a magnitude or amplitude envelope of a signal to be modulated can be scaled and used to drive a node, such as a drain, of the power amplifier circuit. An envelope tracking signal can be generated such as having a bandwidth that is compressed as compared to a full-bandwidth envelope signal. A peak-value “look ahead” technique can be used, for example, so that amplitude compression or clipping of the transmit signal is suppressed when the bandwidth-compressed envelope tracking signal is used to modulate a supply node of the power amplifier used to amplify the transmit signal.
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Patent Agency Ranking
公开(公告)号：US20170338842A1
公开(公告)日：2017-11-23
申请号：US15159532
申请日：2016-05-19
Applicant: Analog Devices Global
Inventor： Patrick Pratt
IPC: H04B1/04
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：US20170338841A1
公开(公告)日：2017-11-23
申请号：US15159492
申请日：2016-05-19
Applicant: Analog Devices Global
Inventor： Patrick Pratt
CPC classification number: H04B1/0475 , H04B2001/0425 , H04L25/03159 , H04L25/03343 , H04L2025/03356
Abstract: Various examples are directed to systems and methods for wideband digital predistortion. A digital pre-distortion circuit may be programmed to receive a complex baseband signal and generate a pre-distorted signal. Generating the pre-distorted signal may comprise applying to the complex baseband signal a first correction for an Nth order distortion of a power amplifier at an Ith harmonic frequency zone centered at about an Ith harmonic of a carrier frequency and applying to the complex baseband signal a second correction for the Nth order distortion at a Jth harmonic frequency zone centered at about a Jth harmonic of the carrier frequency different than the Ith harmonic of a carrier frequency.
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公开(公告)号：US09641206B2
公开(公告)日：2017-05-02
申请号：US14973725
申请日：2015-12-18
Applicant: ANALOG DEVICES GLOBAL
Inventor： Patrick Pratt , Martin Steven McCormick
CPC classification number: H04B1/0475 , H03F1/3223 , H03F1/3241 , H03F1/34 , H03F3/24 , H04B1/04 , H04B1/40 , H04B1/525 , H04B7/0452 , H04B2001/0425 , H04B2001/0433 , H04B2001/0441 , H04L27/2614 , H04W88/08
Abstract: For small cells, transceivers demand high performance while maintaining system efficiency. The present disclosure describes a highly integrated cellular transceiver that offers such features by providing one or more digital functions on-chip, onto the same die in the cellular transceiver. Effectively, the scope and boundary of the cellular transceiver is expanded to move beyond the data converters of the transceiver to include a variety of digital functions, thus integrating more of the signal chain in the cellular transceiver. Integration can greatly reduce complexity for the baseband processing, lower the cost of the overall transceiver system, reduce power consumption, and at the same time, benefit from improvements on the digital functions through integration.
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公开(公告)号：US20170104502A1
公开(公告)日：2017-04-13
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 uplift 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：US20210376800A1
公开(公告)日：2021-12-02
申请号：US17303021
申请日：2021-05-18
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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