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公开(公告)号：US20130141072A1
公开(公告)日：2013-06-06
申请号：US13689922
申请日：2012-11-30
发明人： Nadim Khlat , Michael R. Kay
IPC分类号： G05F3/02
CPC分类号： G05F3/02 , H02M1/14 , H02M3/155 , H02M2003/1586
摘要： Embodiments of circuitry, which includes power supply switching circuitry and a first inductive element, are disclosed. The power supply switching circuitry has a first switching output and a second switching output. The first inductive element is coupled between the first switching output and a power supply output. The power supply switching circuitry operates in one of a first operating mode and a second operating mode. During the first operating mode, the first switching output is voltage compatible with the second switching output. During the second operating mode, the first switching output is allowed to be voltage incompatible with the second switching output.
摘要翻译： 公开了包括电源开关电路和第一电感元件的电路的实施例。 电源开关电路具有第一开关输出和第二开关输出。 第一电感元件耦合在第一开关输出和电源输出之间。 电源开关电路以第一操作模式和第二操作模式中的一个操作。 在第一操作模式期间，第一开关输出与第二开关输出电压兼容。 在第二操作模式期间，允许第一开关输出与第二开关输出不兼容的电压。
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公开(公告)号：US20130107769A1
公开(公告)日：2013-05-02
申请号：US13661164
申请日：2012-10-26
CPC分类号： H03F1/0227 , H02M3/156 , H03F3/19 , H03F2200/108 , H03F2200/351
摘要： This disclosure relates generally to radio frequency (RF) switching converters and RF amplification devices that use RF switching converters. For example, an RF switching converter may include a switching circuit that receives a power source voltage and a switching controller that receives a target average frequency value identifying a target average frequency. The switching circuit is switchable so as to generate a pulsed output voltage from the power source voltage. The switching controller switches the switching circuit such that the pulsed output voltage has an average pulse frequency. The switching controller also detects that the average pulse frequency of the pulsed output voltage during a time period differs from the target average frequency, and reduces a difference between the average pulse frequency and the target average frequency. In this manner, the effects of manufacturing variations and operational variations on the average pulse frequency can be eliminated, or at least diminished.
摘要翻译： 本公开一般涉及使用RF开关转换器的射频（RF）开关转换器和RF放大器件。 例如，RF开关转换器可以包括接收电源电压的开关电路和接收识别目标平均频率的目标平均频率值的开关控制器。 开关电路是可切换的，以便从电源电压产生脉冲输出电压。 开关控制器切换开关电路，使得脉冲输出电压具有平均脉冲频率。 切换控制器还检测在一段时间内脉冲输出电压的平均脉冲频率与目标平均频率不同，并且减小了平均脉冲频率和目标平均频率之间的差。 以这种方式，可以消除或至少减少制造变化和操作变化对平均脉冲频率的影响。
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公开(公告)号：US20130106508A1
公开(公告)日：2013-05-02
申请号：US13661552
申请日：2012-10-26
发明人： Nadim Khlat , Michael R. Kay , Philippe Gorisse
CPC分类号： H02M3/156 , H02M1/15 , H02M2001/0045 , H02M2001/0048 , H03F1/0216 , H03F3/2171 , Y02B70/1491
摘要： A direct current (DC)-DC converter, which includes a parallel amplifier and a switching supply, is disclosed. The switching supply includes switching circuitry, a first inductive element, and a second inductive element. The parallel amplifier has a feedback input and a parallel amplifier output. The switching circuitry has a switching circuitry output. The first inductive element is coupled between the switching circuitry output and the feedback input. The second inductive element is coupled between the feedback input and the parallel amplifier output.
摘要翻译： 公开了一种包括并联放大器和开关电源的直流（DC）-DC转换器。 开关电源包括开关电路，第一电感元件和第二电感元件。 并联放大器具有反馈输入和并行放大器输出。 开关电路具有开关电路输出。 第一电感元件耦合在开关电路输出和反馈输入之间。 第二电感元件耦合在反馈输入端和并行放大器输出端之间。
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公开(公告)号：US09973173B2
公开(公告)日：2018-05-15
申请号：US15010829
申请日：2016-01-29
发明人： Nadim Khlat , Marcus Granger-Jones
CPC分类号： H03H19/002 , H03H7/465 , H03H2250/00 , H04B1/006
摘要： This disclosure relates to radio frequency (RF) front end circuitry used to route RF signals. In one embodiment, the RF front end circuitry has a filter circuit and a switch device. The switch device includes a common port, an RF port, and switchable path connected in series between the common port and the RF port. The switch device is configured to present approximately the filter capacitance of the filter circuit at the common port when the switchable path is closed. However, when the switchable path is open, the switch device is configured to present a device capacitance at the common port that is approximately equal to the filter capacitance of the filter circuit. In this manner, if the common port is connected to an antenna, the capacitance seen by the antenna from the common port remains substantially unchanged regardless of which of the switchable path is opened or closed.
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公开(公告)号：US09935662B2
公开(公告)日：2018-04-03
申请号：US15131417
申请日：2016-04-18
发明人： Nadim Khlat , Andrew F. Folkmann
CPC分类号： H04B1/006 , H03F3/24 , H04B1/0458 , H04B1/0475 , H04B2001/0408 , H04L5/14
摘要： A front-end module configured to cancel unwanted transmit spectrum at one or more receivers comprises at least one transmitter having a power amplifier and configured to transmit signals to an antenna. The front-end module also comprises at least one receiver to receive the transmit signals, wherein the at least one receiver receives at least a portion of unwanted transmit spectrum. A directional coupler couples at least a portion of a transmit output signal from the power amplifier to provide a coupled transmit output signal to signal conditioning circuitry associated with the at least one receiver and configured to condition the coupled transmit output signal to generate a conditioned transmit signal to provide to the at least one receiver, wherein the conditioned transmit signal at least partially cancels the unwanted transmit spectrum. The signal conditioning circuitry may adjust the amplitude and phase of the coupled transmit output signal.
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公开(公告)号：US09853685B2
公开(公告)日：2017-12-26
申请号：US14329493
申请日：2014-07-11
发明人： Nadim Khlat , Jayanti Jaganatha Rao
CPC分类号： H04B1/525 , H03H7/0153 , H03H7/463 , H04L5/14 , H04L5/1415 , H04L5/1469 , H04L5/16
摘要： RF duplexing and methods of operating the same are described herein. In one embodiment, an RF duplexing system may include a control circuit and a duplexer with a first tunable RF filter and second tunable RF filter. The control circuit is operable in a full duplexing transmission mode and a half duplexing transmission mode. The control circuit tunes the first tunable RF filter in the full duplexing transmission mode so that the first tunable RF filter defines a transmission passband and tune the second tunable RF filter so that the second tunable RF filter defines a receive passband. Also, the control circuit tunes one of the tunable RF filters so that the tunable RF filter defines the passband while the other tunable RF filter enhances the passband. In this manner, the tunable RF filters in the duplexer are both utilized to get better performance during the half duplexing mode.
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公开(公告)号：US09843342B2
公开(公告)日：2017-12-12
申请号：US14922803
申请日：2015-10-26
发明人： Nadim Khlat
IPC分类号： H04B1/00
CPC分类号： H04B1/0057 , H04B1/0064
摘要： A tunable RF transmit/receive (TX/RX) multiplexer, which includes a tunable RF TX/RX diplexing circuit and a first group of RF RX bandpass filters, is disclosed. The tunable RF TX/RX diplexing circuit has a first RX connection node and a first antenna port, which is coupled to a first RF antenna. Each of the first group of RF RX bandpass filters is coupled to the first RX connection node. At least two of the first group of RF RX bandpass filters simultaneously receive and filter respective RF input signals via the first RX connection node to provide respective filtered RF input signals.
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公开(公告)号：US09711999B2
公开(公告)日：2017-07-18
申请号：US14851642
申请日：2015-09-11
摘要： Antenna array calibration for wireless charging is disclosed. A wireless charging system is provided and configured to calibrate antenna elements in a wireless charging station based on a feedback signal provided by a wireless charging device. The antenna elements in the wireless charging station transmit wireless radio frequency (RF) charging signals to the wireless charging device. The wireless charging device provides the feedback signal to the wireless charging station to indicate total RF power in the wireless RF charging signals. The wireless charging station is configured to adjust transmitter phases associated with the antenna elements based on the feedback signal until the total RF power in the wireless RF charging signals is maximized. By calibrating the antenna elements based on the feedback signal, it is possible to achieve phase coherency among the antenna elements without requiring factory calibration.
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公开(公告)号：US09698751B2
公开(公告)日：2017-07-04
申请号：US14931165
申请日：2015-11-03
CPC分类号： H03H7/463 , H01F17/0006
摘要： RF multiplexer circuitry includes a first signal path coupled between a first intermediate node and a common node, a second signal path coupled between a second intermediate node and the common node, first resonator circuitry coupled between the first signal path and ground, and second resonator circuitry coupled between the second signal path and ground. The first resonator circuitry is configured to allow signals within a first frequency pass band to pass between the first intermediate node and the common node, while attenuating signals outside of the first frequency pass band. The first resonator circuitry includes a first LC resonator. The second resonator circuitry is configured to allow signals within a second frequency pass band to pass between the second intermediate node and the common node, while attenuating signals outside of the second frequency pass band.
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公开(公告)号：US09584071B2
公开(公告)日：2017-02-28
申请号：US14868890
申请日：2015-09-29
发明人： Nadim Khlat
CPC分类号： H03F1/0227 , H03F3/19 , H03F3/245 , H03F2200/102 , H03F2200/451 , H03G3/3036 , H04B1/04 , H04B2001/0416
摘要： Envelope power supply circuitry includes power converter circuitry and envelope tracking circuitry. The power converter circuitry is configured to receive an envelope power converter control signal and a supply voltage and provide an envelope power supply signal for an amplifier from the supply voltage and based on the envelope power converter control signal. The envelope tracking circuitry is coupled to the power converter circuitry. In a first mode of operation, the envelope tracking circuitry is configured to provide the envelope power converter control signal such that a gain of the amplifier remains substantially constant over a range of input power provided to the amplifier. In a second mode of operation, the envelope tracking circuitry is configured to limit the dynamic range of the envelope power supply signal.
摘要翻译： 信封电源电路包括电源转换器电路和信封跟踪电路。 功率转换器电路被配置为接收包络功率转换器控制信号和电源电压，并且根据电源电压并基于包络功率转换器控制信号为放大器提供包络电源信号。 信封跟踪电路耦合到功率转换器电路。 在第一操作模式中，包络跟踪电路被配置为提供包络功率转换器控制信号，使得在提供给放大器的输入功率的范围上，放大器的增益保持基本恒定。 在第二操作模式中，包络跟踪电路被配置为限制包络电源信号的动态范围。
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