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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：US09294067B2
公开(公告)日：2016-03-22
申请号：US13668743
申请日：2012-11-05
Applicant: RF Micro Devices, Inc.
Inventor： Michael F. Zybura , Marcus Granger-Jones
CPC classification number: H03H7/42 , H03H7/0115 , H03H7/09 , H03H7/1775
Abstract: In one embodiment, a balanced to unbalanced transformer utilizes a crossover configuration such that some portion of the secondary coil (inductor) is shared between two resonators (capacitors). Adding a first capacitor in parallel with a portion of the secondary inductor creates a first harmonic trap (filter), and also efficiently uses the secondary coil (inductor) as a resonating element.Adding a second capacitor which shares (crossover configuration) a portion of the secondary inductor with the first capacitor creates a second harmonic trap (filter), which may be tuned to the same harmonic as the first harmonic trap, or may be tuned to a different harmonic.
Abstract translation: 在一个实施例中，平衡到不平衡变压器利用交叉配置，使得次级线圈（电感器）的某些部分在两个谐振器（电容器）之间共享。 添加与次级电感器的一部分并联的第一电容器产生第一谐波陷波器（滤波器），并且还有效地使用次级线圈（电感器）作为谐振元件。 使用第一电容器添加共享（交叉配置）次级电感器的一部分的第二电容器产生二次谐波陷波器（滤波器），其可以调谐到与第一谐波陷波器相同的谐波，或者可以被调谐到不同的 谐波。
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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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Patent Agency Ranking
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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公开(公告)号：US09209784B2
公开(公告)日：2015-12-08
申请号：US13922337
申请日：2013-06-20
Applicant: RF Micro Devices, Inc.
Inventor： Christian Rye Iversen , Marcus Granger-Jones
CPC classification number: H03H21/0007 , H03K17/102
Abstract: Switchable capacitive elements are disclosed, along with programmable capacitor arrays (PCAs). One embodiment of the switchable capacitive element includes a field effect transistor (FET) device stack, a first capacitor, and a second capacitor. The FET device stack is operable in an open state and in a closed state and has a plurality of FET devices coupled in series to form the FET device stack. The first capacitor and the second capacitor are both coupled in series with the FET device stack. However, the first capacitor is coupled to a first end of the FET device stack while the second capacitor is coupled to a second end opposite the first end of the FET device stack. In this manner, the switchable capacitive element can be operated without a negative charge pump, with decreased bias swings, and with a better power performance.
Abstract translation: 公开了可切换电容元件以及可编程电容器阵列（PCA）。 可切换电容元件的一个实施例包括场效应晶体管（FET）器件堆叠，第一电容器和第二电容器。 FET器件堆栈可在打开状态和关闭状态下工作，并且具有串联耦合以形成FET器件堆叠的多个FET器件。 第一电容器和第二电容器都与FET器件堆叠串联耦合。 然而，第一电容器耦合到FET器件堆叠的第一端，而第二电容器耦合到与FET器件堆叠的第一端相对的第二端。 以这种方式，可切换的电容元件可以在没有负电荷泵的情况下操作，具有减小的偏置摆动以及更好的功率性能。
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公开(公告)号：US09197182B2
公开(公告)日：2015-11-24
申请号：US14010643
申请日：2013-08-27
Applicant: RF Micro Devices, Inc.
Inventor： Brian Baxter , Jason Millard , Roman Zbigniew Arkiszewski , Steven Selby
CPC classification number: H03G99/00 , H03G3/20 , H03G3/3042 , H04B1/62
Abstract: The present disclosure relates to envelope power supply calibration of a multi-mode RF power amplifier (PA) to ensure adequate headroom when operating using one of multiple communications modes. The communications modes may include multiple modulation modes, a half-duplex mode, a full-duplex mode, or any combination thereof. As such, each communications mode may have specific peak-to-average power and linearity requirements for the multi-mode RF PA. As a result, each communications mode may have corresponding envelope power supply headroom requirements. The calibration may include determining a saturation operating constraint based on calibration data obtained during saturated operation of the multi-mode RF PA. During operation of the multi-mode RF PA, the envelope power supply may be restricted to provide a minimum allowable magnitude based on an RF signal level of the multi-mode RF PA, the communications mode, and the saturation operating constraint to provide adequate headroom.
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公开(公告)号：US20150325568A1
公开(公告)日：2015-11-12
申请号：US14687310
申请日：2015-04-15
Applicant: RF Micro Devices, Inc.
Inventor： Muhammad Iqbal Chaudhry , Nathaniel Peachey
IPC: H01L27/02
CPC classification number: H01L27/0251 , H01L27/0259
Abstract: Aspects disclosed in the detailed description include an electrostatic discharge (ESD) protection circuit. In this regard, in one aspect, an ESD protection circuit is provided to protect an integrated circuit (IC) during fabrication and production. An ESD detection circuitry detects an ESD event by detecting a voltage spike between a supply rail and a ground rail exceeding an ESD threshold voltage. In response to detecting the ESD event, an ESD clamping circuitry is activated to discharge the ESD event, thus protecting the IC from being damaged by the ESD event. By detecting the ESD event based on the ESD threshold voltage, as opposed to detecting the ESD event based on rise time of the voltage spike, it is possible to prevent the ESD clamping circuitry from missing voltage spikes associated with a slow rise time or being falsely activated by a normal power-on voltage associated with a fast rise time.
Abstract translation: 在详细描述中公开的方面包括静电放电（ESD）保护电路。 在这方面，在一个方面，提供ESD保护电路以在制造和制造期间保护集成电路（IC）。 ESD检测电路通过检测超过ESD阈值电压的电源轨和接地轨之间的电压尖峰来检测ESD事件。 响应于检测到ESD事件，ESD钳位电路被激活以释放ESD事件，从而保护IC免受ESD事件的损害。 通过基于ESD阈值电压检测ESD事件，与基于电压尖峰的上升时间检测ESD事件相反，可以防止ESD钳位电路丢失与缓慢上升时间相关联的电压尖峰或错误地 由与快速上升时间相关联的正常上电电压激活。
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公开(公告)号：US09184701B2
公开(公告)日：2015-11-10
申请号：US13937810
申请日：2013-07-09
Applicant: RF Micro Devices, Inc.
Inventor： Jean-Christophe Berchtold , Chris Levesque , William David Southcombe , David E. Jones , Scott Yoder , Terry J. Stockert
IPC: H02M3/156 , H03F1/02 , H02M3/00 , H02M3/158 , H03F3/195 , H03F3/21 , H03F3/24 , H02M3/07 , H04B1/04 , H02M1/34
CPC classification number: H03F1/0211 , H02M1/34 , H02M3/00 , H02M3/07 , H02M3/1584 , H03F1/0227 , H03F1/0277 , H03F3/195 , H03F3/211 , H03F3/245 , H03F2200/18 , H03F2200/336 , H04B2001/0416
Abstract: Circuitry, which includes a direct current (DC)-DC converter having a first switching power supply is disclosed. The first switching power supply includes a first switching converter, an energy storage element, a first inductive element, which is coupled between the first switching converter and the energy storage element, and a first snubber circuit, which is coupled across the first inductive element. The first switching power supply receives and converts a DC power supply signal to provide a first switching power supply output signal based on a setpoint.
Abstract translation: 公开了包括具有第一开关电源的直流（DC）-DC转换器的电路。 第一开关电源包括耦合在第一开关转换器和能量存储元件之间的第一开关转换器，能量存储元件，第一电感元件和耦合在第一电感元件上的第一缓冲电路。 第一开关电源接收并转换DC电源信号，以基于设定点提供第一开关电源输出信号。
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