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公开(公告)号：US20160087338A1
公开(公告)日：2016-03-24
申请号：US14843507
申请日：2015-09-02
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat
Abstract: Antenna array calibration for wireless charging is disclosed. In one aspect, an initial calibration sequence is performed each time a wireless charging station is powered on. The initial calibration sequence utilizes a reference antenna element, which is an antenna element randomly selected from a plurality of antenna elements in the wireless charging station, to determine relative receiver phase errors between the reference antenna element and each of the other antenna elements in an antenna array. In another aspect, a training sequence is performed after completing the initial calibration sequence to determine total relative phase errors between the reference antenna element and each of the other antenna elements in the antenna array. Adjustments can then be made to match respective total relative phase errors among the plurality of antenna elements to achieve phase coherency among the plurality of antenna elements for improved wireless charging power efficiency.
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公开(公告)号：US09294041B2
公开(公告)日：2016-03-22
申请号：US13661164
申请日：2012-10-26
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Christopher Truong Ngo
CPC classification number: H03F1/0227 , H02M3/156 , H03F3/19 , H03F2200/108 , H03F2200/351
Abstract: 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.
Abstract translation: 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：US09276784B2
公开(公告)日：2016-03-01
申请号：US14548129
申请日：2014-11-19
Applicant: RF Micro Devices, Inc.
Inventor： Andrew F. Folkmann , Nadim Khlat
CPC classification number: H04L25/08 , H03F1/0211 , H03F1/0261 , H03F1/0266 , H03F1/3247 , H03F3/19 , H03F3/245 , H03F2200/102 , H03F2201/3215 , H03F2201/3227
Abstract: A baseband PA predistortion module, which includes a baseband combiner, a baseband PA correction circuit, and a baseband filter, is disclosed. The baseband PA correction circuit replicates behavior of an RF PA by processing a modulation data signal to provide a predistortion data signal. The behavior of the RF PA includes distortion. The modulation data signal is representative of an RF input signal to an RF PA and the predistortion data signal is representative of a correction needed at an output of the RF PA. The baseband filter receives and filters the predistortion data signal to provide a reduced predistortion data signal, such that a low frequency content of the reduced predistortion data signal is less than a low frequency content of the predistortion data signal. The baseband combiner receives and combines the modulation data signal and the reduced predistortion data signal to provide a baseband transmit signal.
Abstract translation: 公开了一种基带PA预失真模块，其包括基带组合器，基带PA校正电路和基带滤波器。 基带PA校正电路通过处理调制数据信号来复制RF PA的行为以提供预失真数据信号。 RF PA的行为包括畸变。 调制数据信号表示到RF PA的RF输入信号，并且预失真数据信号表示在RF PA的输出处所需的校正。 基带滤波器接收并过滤预失真数据信号以提供减少的预失真数据信号，使得减少的预失真数据信号的低频内容小于预失真数据信号的低频内容。 基带组合器接收并组合调制数据信号和减少的预失真数据信号以提供基带发射信号。
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公开(公告)号：US20160056705A1
公开(公告)日：2016-02-25
申请号：US14831080
申请日：2015-08-20
Applicant: RF Micro Devices, Inc.
Inventor： Mohammad Ahsanul Adeeb , Philippe Gorisse , Nadim Khlat , Michael R. Kay
CPC classification number: H02M3/1582 , H02M3/156
Abstract: A direct current (DC) voltage converter configured to transition between operation modes is disclosed. A voltage selection circuitry is provided in a DC voltage conversion circuit to control a buck-boost converter that generates a DC output voltage. As opposed to conventional methods of switching the buck-boost converter between a buck mode and a boost mode based on a single switching threshold, the voltage selection circuitry is configured to switch the buck-boost converter between the buck mode and the boost mode based on multiple voltage thresholds. Each of the multiple voltage thresholds defines a respective range for the DC output voltage. By controlling the buck-boost converter based on multiple voltage thresholds, it is possible to provide a smoother transition between the buck mode and the boost mode, thus reducing voltage errors in the DC output voltage and improving reliability of the DC voltage conversion circuit.
Abstract translation: 公开了一种配置成在操作模式之间转换的直流（DC）电压转换器。 在DC电压转换电路中提供电压选择电路以控制产生DC输出电压的降压 - 升压转换器。 与基于单个切换阈值在降压模式和升压模式之间切换降压 - 升压转换器的常规方法相反，电压选择电路被配置为基于降压模式和升压模式之间的降压 - 升压转换器 多电压阈值。 多个电压阈值中的每一个定义了直流输出电压的相应范围。 通过基于多个电压阈值控制降压 - 升压转换器，可以在降压模式和升压模式之间提供更平滑的转换，从而减小直流输出电压中的电压误差并提高直流电压转换电路的可靠性。
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公开(公告)号：US20160049921A1
公开(公告)日：2016-02-18
申请号：US14824937
申请日：2015-08-12
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat
CPC classification number: H04B7/24 , H03H7/40 , H03H7/465 , H03H11/30 , H03H11/344
Abstract: A configurable RF transmit/receive (TX/RX) multiplexer, which includes a group of RF TX bandpass filters, a group of RF TX switching elements, and a group of RF RX bandpass filters; is disclosed. Each of the group of RF RX bandpass filters is coupled to a first common connection node. Each of the group of RF TX switching elements is coupled between a corresponding one of the group of RF TX bandpass filters and the first common connection node, which is coupled to a first RF antenna.
Abstract translation: 一个可配置的RF发射/接收（TX / RX）多路复用器，其包括一组RF TX带通滤波器，一组RF TX开关元件和一组RF RX带通滤波器; 被披露。 RF RX带通滤波器组中的每一个耦合到第一公共连接节点。 所述一组RF TX开关元件中的每一个耦合在所述一组RF TX带通滤波器中的相应一个和耦合到第一RF天线的第一公共连接节点之间。
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Patent Agency Ranking
公开(公告)号：US09156677B2
公开(公告)日：2015-10-13
申请号：US13764324
申请日：2013-02-11
Applicant: RF Micro Devices, Inc.
Inventor： Ruediger Bauder , Nadim Khlat , Julio Costa , Jonathan Hammond
CPC classification number: B81B7/0022 , B81B2201/014 , B81C1/00976 , H01H59/0009 , H04W52/02
Abstract: Pilot switch circuitry grounds a hot node (an injection node) of a microelectromechanical system (MEMS) switch to reduce or eliminate arcing between a cantilever contact and a terminal contact when the MEMS switch is opened or closed. The pilot switch circuitry grounds the hot node prior to, during, and after the cantilever contact and terminal contact of the MEMS come into contact with one another (when the MEMS switch is closed). Additionally, the pilot switch circuitry grounds the hot node prior to, during, and after the cantilever contact and terminal contact of the MEMS disengage from one another (when the MEMS switch is opened).
Abstract translation: 导向开关电路将微机电系统（MEMS）开关的热节点（注入节点）接地，以在MEMS开关打开或关闭时减少或消除悬臂触点和端子触点之间的电弧。 在MEMS悬臂接触之前，期间和之后，导频开关电路将热节点接地，并且MEMS的端子接触彼此接触（当MEMS开关闭合时）。 此外，导频开关电路在MEMS的彼此脱离接合之前，之中和之后，以及MEMS的彼此脱离接合（当MEMS开关断开时）接地。
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207.发明授权公开(公告)号：US09088326B2
公开(公告)日：2015-07-21
申请号：US13921285
申请日：2013-06-19
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat
IPC: H04B1/10
CPC classification number: H04B1/10 , H04B1/0057
Abstract: A front end radio architecture is configured to provide a split band frequency arrangement that includes co-banding. The disclosed split band frequency arrangement combines a medium bandwidth filter with a small bandwidth filter to provide enough bandwidth to pass a relatively large communication band. The medium bandwidth filter has a bandwidth that is large enough to support co-banding of smaller communication bands, while also having a narrow enough bandwidth to realize a relatively steep roll-off that ensures coexistence with adjacent bands that are not co-banded. The bandwidths of the medium bandwidth filter and the small bandwidth filter overlap in bandwidth by an amount that is at least as large as the highest bandwidth signal expected to be received or transmitted. The split band frequency arrangement reduces the number of filters needed in the front end radio architecture by repurposing the small bandwidth filter, and by co-banding the smaller communication bands.
Abstract translation: 前端无线电架构被配置为提供包括共带的分离频带频率布置。 所公开的分段频率布置将中带宽滤波器与小带宽滤波器组合以提供足够的带宽以通过相对较大的通信频带。 中带宽滤波器具有足够大的带宽以支持较小通信频带的共带，同时还具有足够窄的带宽以实现相对陡峭的滚降，确保与未共同带状的相邻频带共存。 中带宽滤波器和小带宽滤波器的带宽在带宽中重叠的量至少与预期接收或发送的最高带宽信号一样大。 分频带频率布置通过重新利用小带宽滤波器以及通过共同划分较小的通信频带来减少前端无线电架构中所需的滤波器的数量。
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公开(公告)号：US09083518B2
公开(公告)日：2015-07-14
申请号：US13760240
申请日：2013-02-06
Applicant: RF Micro Devices, Inc.
Inventor： Ruediger Bauder , Marcus Granger-Jones , Nadim Khlat
CPC classification number: H04L5/14 , H03H7/48 , H04B1/44 , H04B1/525 , H04L25/03878
Abstract: This disclosure includes embodiments of a tunable hybrid coupler. The tunable hybrid coupler includes a first inductive element having a first inductance, a second inductive element having a second inductance and mutually coupled to the first inductive element, a first variable capacitive element having a first variable capacitance, and a second variable capacitance having a second variable capacitance. The first variable capacitive element is coupled between a first port and a second port. The second variable capacitive element is coupled between a third port and a fourth port. The first inductive element is coupled from the first port to the third port, while the second inductive element is coupled from the second port to the fourth port. Accordingly, the tunable hybrid coupler may form an impedance matching network that is tunable to different radio frequency (RF) communication bands. The tunable hybrid coupler can be used in a tunable RF duplexer.
Abstract translation: 本公开包括可调混合耦合器的实施例。 可调混合耦合器包括具有第一电感的第一电感元件，具有第二电感并且相互耦合到第一电感元件的第二电感元件，具有第一可变电容的第一可变电容元件和具有第二可变电容的第二可变电容 可变电容。 第一可变电容元件耦合在第一端口和第二端口之间。 第二可变电容元件耦合在第三端口和第四端口之间。 第一电感元件从第一端口耦合到第三端口，而第二电感元件从第二端口耦合到第四端口。 因此，可调混合耦合器可以形成可调谐到不同射频（RF）通信频带的阻抗匹配网络。 可调混合耦合器可用于可调谐RF双工器。
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公开(公告)号：US20150180422A1
公开(公告)日：2015-06-25
申请号：US14638374
申请日：2015-03-04
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Michael R. Kay
CPC classification number: H03F1/0238 , H02M3/07 , H03F1/0244 , H03F1/025 , H03F3/189 , H03F3/19 , H03F3/21 , H03F3/24 , H03F2200/102 , H03F2200/375 , H03F2200/451 , H03F2200/555 , H03G3/004
Abstract: Embodiments disclosed in the detailed description relate to a pseudo-envelope follower power management system used to manage the power delivered to a linear RF power amplifier.
Abstract translation: 在详细描述中公开的实施例涉及用于管理传送到线性RF功率放大器的功率的伪包络跟随器功率管理系统。
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公开(公告)号：US20150117281A1
公开(公告)日：2015-04-30
申请号：US14547502
申请日：2014-11-19
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Marcus Granger-Jones
IPC: H04L5/08
CPC classification number: H03H7/463 , H03H7/48 , H04B1/0057 , H04B1/40 , H04B1/50 , H04B10/556 , H04L5/08 , H04L27/2085
Abstract: Embodiments of a tunable radio frequency (RF) diplexer and methods of operating the same are disclosed. In one embodiment, the RF diplexer includes a first hybrid coupler, a second hybrid coupler, an RF filter circuit, and a phase inversion component. Both the RF filter circuit and the phase inversion component are connected between the first hybrid coupler and the second hybrid coupler. The phase inversion component is configured to provide approximately a differential phase. The RF filter circuit is configured to provide a passband and a notch. The RF filter circuit is tunable to provide the notch on both a high-frequency side of the passband and a low frequency side of the passband. Accordingly, the tunable RF diplexer provides lower insertion losses and higher isolation regardless of whether the one of the diplexed frequency bands is set at higher frequencies or lower frequencies than the other diplexed frequency band.
Abstract translation: 公开了可调谐射频（RF）双工器的实施例及其操作方法。 在一个实施例中，RF双工器包括第一混合耦合器，第二混合耦合器，RF滤波器电路和相位反转分量。 RF滤波器电路和相位反转分量都连接在第一混合耦合器和第二混合耦合器之间。 相位反转分量被配置为提供大致差分相位。 RF滤波器电路被配置为提供通带和陷波。 RF滤波器电路是可调谐的，以在通带的高频侧和通带的低频侧提供陷波。 因此，可调谐RF双工器提供较低的插入损耗和更高的隔离度，而不管双工频带中的一个是否设置在比另一个双工频带更高的频率或更低的频率。
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