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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
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat
CPC classification number: H03F1/0227 , H03F3/19 , H03F3/245 , H03F2200/102 , H03F2200/451 , H03G3/3036 , H04B1/04 , H04B2001/0416
Abstract: 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.
Abstract translation: 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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公开(公告)号：US20160365836A1
公开(公告)日：2016-12-15
申请号：US15055119
申请日：2016-02-26
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Michael R. Kay
IPC: H03F1/02 , H03F3/19 , H03F3/24 , H03K5/1536
CPC classification number: H03K5/1536 , H03F1/0222 , H03F1/0266 , H03F3/19 , H03F3/245 , H03F2200/102 , H03F2200/391 , H03F2200/432 , H03F2200/451 , H03F2200/462
Abstract: Circuitry, which includes a parallel amplifier and a switching supply, is disclosed. The parallel amplifier regulates a power supply output voltage based on a power supply control signal and provides a current sense signal, which is representative of a parallel amplifier output current from the parallel amplifier. The switching supply is coupled to the parallel amplifier. The switching supply provides a switching output voltage and makes an early determination of the switching output voltage using the current sense signal and the power supply control signal to at least partially compensate for delay in the switching supply. Additionally, the switching supply drives the parallel amplifier output current toward zero using the switching output voltage to increase efficiency.
Abstract translation: 公开了包括并联放大器和开关电源的电路。 并联放大器基于电源控制信号调节电源输出电压，并提供电流检测信号，其代表来自并行放大器的并行放大器输出电流。 开关电源耦合到并联放大器。 开关电源提供开关输出电压，并且使用电流检测信号和电源控制信号来早期确定开关输出电压，以至少部分地补偿开关电源中的延迟。 此外，开关电源使用开关输出电压将并行放大器输出电流驱动到零，以提高效率。
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63.发明申请RF LADDER FILTER WITH SIMPLIFIED ACOUSTIC RF RESONATOR PARALLEL CAPACITANCE COMPENSATION 有权射频梯形滤波器，具有简化的声学RF谐振器并联电容补偿公开(公告)号：US20160191012A1
公开(公告)日：2016-06-30
申请号：US15004084
申请日：2016-01-22
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Andrew F. Folkmann , Robert Aigner , Marcus Granger-Jones
CPC classification number: H03H9/542 , H03H9/605 , H03H9/6483 , H03H9/6489
Abstract: An RF ladder filter having a parallel capacitance compensation circuit is disclosed. The parallel capacitance compensation circuit is made up of a first inductive element with a first T-terminal and a first end coupled to a first ladder terminal and a second inductive element with a second T-terminal that is coupled to the first T-terminal of the first inductive element and a second end coupled to a second ladder terminal. Further included is a compensating acoustic RF resonator (ARFR) having a fixed node terminal and a third T-terminal that is coupled to the first T-terminal of the first inductive element and the second T-terminal of the second inductive element, and a finite number of series-coupled ladder ARFRs, wherein the parallel capacitance compensation circuit is coupled across one of the finite number of series-coupled ARFRs by way of the first ladder terminal and the second ladder terminal.
Abstract translation: 公开了一种具有并联电容补偿电路的RF梯形滤波器。 并联电容补偿电路由具有第一T端和第一端耦合到第一梯形终端的第一电感元件和与第二电感元件耦合的第二电感元件组成，第二电感元件连接到第一T端的第一T端 第一电感元件和耦合到第二梯形终端的第二端。 还包括具有固定节点终端的补偿声RF谐振器（ARFR）和耦合到第一电感元件的第一T端和第二电感元件的第二T端的第三T端，以及 有限数量的串联耦合梯形ARFR，其中并联电容补偿电路通过第一梯形终端和第二梯形终端耦合在有限数量的串联耦合ARFR之一上。
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公开(公告)号：US09379670B2
公开(公告)日：2016-06-28
申请号：US14163256
申请日：2014-01-24
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Michael R. Kay , Manbir Singh Nag
Abstract: A parallel amplifier and an offset capacitance voltage control loop are disclosed. The parallel amplifier has a parallel amplifier output, which is coupled to an envelope tracking power supply output via an offset capacitive element. The offset capacitive element has an offset capacitive voltage. The offset capacitance voltage control loop regulates the offset capacitive voltage, which is adjustable on a communications slot-to-communications slot basis.
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公开(公告)号：US20160164551A1
公开(公告)日：2016-06-09
申请号：US14959954
申请日：2015-12-04
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Michael R. Kay
CPC classification number: H03F3/19 , H03F1/0227 , H03F3/245 , H03F2200/102 , H03F2200/451
Abstract: The present disclosure relates to envelope tracking with reduced circuit area and power consumption. In one embodiment, an envelope power converter includes a switching power converter configured to receive a supply voltage and provide an output based on a switching control signal. A holding inductor is coupled between the switching power converter and envelope power supply output node. An offset capacitor is coupled between the envelope power supply output node and control node. In response to a target envelope power supply output voltage, a control circuit is configured to generate the switching control signal and a control voltage to maintain envelope power supply signal at target voltage level. The control circuit is configured to generate switching control signal and control voltage such that supply voltage is provided by switching power converter to holding inductor and offset capacitor is charged to target level without changing voltage of envelope power supply signal.
Abstract translation: 本公开涉及具有减小的电路面积和功耗的包络跟踪。 在一个实施例中，包络功率转换器包括被配置为接收电源电压并且基于开关控制信号提供输出的开关功率转换器。 保持电感耦合在开关电源转换器和外壳电源输出节点之间。 偏置电容器耦合在封装电源输出节点和控制节点之间。 响应于目标包络电源输出电压，控制电路被配置为产生开关控制信号和控制电压，以将包络电源信号保持在目标电压电平。 控制电路被配置为产生开关控制信号和控制电压，使得电源电压由开关功率转换器提供给保持电感器，并且偏移电容器被充电到目标电平而不改变包络电源信号的电压。
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Patent Agency Ranking
公开(公告)号：US09356643B2
公开(公告)日：2016-05-31
申请号：US13718148
申请日：2012-12-18
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat
CPC classification number: H04B1/44 , H04B1/525 , H04L5/1461
Abstract: Radio frequency (RF) duplexing devices and methods of operating the same are disclosed. In one embodiment, an RF duplexing device includes a transmission port, a receive port, a first duplexer, and a second duplexer. The first duplexer is coupled to the transmission port and the receive port, and is configured to provide a first phase shift from the transmission port to the receive port. The second duplexer is also coupled to the transmission port and the receive port. However, the second duplexer is configured to provide a second phase shift that is differential to the first phase shift from the transmission port to the receive port. By providing the second phase shift so that the second phase shift is differential to the first phase shift, the RF duplexing device can provide isolation through cancellation without needing to introduce significant insertion losses.
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公开(公告)号：US20160149690A1
公开(公告)日：2016-05-26
申请号：US14939272
申请日：2015-11-12
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat
CPC classification number: H04W72/0446 , H04L5/001 , H04L5/1469
Abstract: Circuitry includes an antenna node, a number of input/output nodes, radio frequency (RF) multiplexer circuitry, and bypass circuitry. The RF multiplexer circuitry is coupled between the input/output nodes and the antenna node. The bypass circuitry is coupled to the input/output nodes and the antenna node. The bypass circuitry is configured to, in each uplink time slot of a TDD frame, couple one of the input/output nodes directly to the antenna node such that the RF multiplexer circuitry is bypassed. Further, the bypass circuitry is configured to, in each downlink time slot of the TDD frame, couple each one of the input/output nodes to the antenna node via the RF multiplexer circuitry.
Abstract translation: 电路包括天线节点，多个输入/输出节点，射频（RF）多路复用器电路和旁路电路。 RF多路复用器电路耦合在输入/输出节点和天线节点之间。 旁路电路耦合到输入/输出节点和天线节点。 旁路电路被配置为在TDD帧的每个上行链路时隙中将输入/输出节点中的一个直接耦合到天线节点，使得RF多路复用器电路被旁路。 此外，旁路电路被配置为在TDD帧的每个下行链路时隙中经由RF多路复用器电路将每个输入/输出节点耦合到天线节点。
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公开(公告)号：US09331836B2
公开(公告)日：2016-05-03
申请号：US14029015
申请日：2013-09-17
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Ruediger Bauder , Andrew F. Folkmann
CPC classification number: H04L5/14 , H04B1/0483
Abstract: The present disclosure relates to de-multiplexing at least one RF input signal feeding RF power amplifier circuitry to create multiple de-multiplexed RF output signals, which may be used to provide RF transmit signals in an RF communications system. Output transformer circuitry is coupled to outputs from the RF power amplifier circuitry to provide the de-multiplexed RF output signals, which may support multiple modes, multiple frequency bands, or both. The de-multiplexed RF output signals may be used in place of RF switching elements in certain embodiments. As a result, RF front-end switching circuitry in the RF communications system may be simplified, thereby reducing insertion losses, reducing costs, reducing size, or any combination thereof. Additionally, the output transformer circuitry may provide load line transformation, output transistor biasing, or both to the RF power amplifier circuitry.
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公开(公告)号：US20160119016A1
公开(公告)日：2016-04-28
申请号：US14872800
申请日：2015-10-01
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat
CPC classification number: H04B1/44 , H01Q21/28 , H04B7/0602 , H04B7/0686 , H04B7/0871 , H04L5/14
Abstract: Aspects disclosed in the detailed description include antenna switching for a communication circuit. A communication circuit includes an antenna switching circuit that couples the communication circuit to a first antenna and/or a second antenna for radio frequency (RF) signal transmission and reception. The antenna switching circuit is configured to include fewer antenna switches compared to a conventional antenna switching circuit to reduce the cost and footprint of the communication circuit. Furthermore, by reducing the number of antenna switches in the antenna switching circuit, it is possible to improve RF isolation between the first antenna and the second antenna, thus leading to improved RF performance of the communication circuit.
Abstract translation: 在详细描述中公开的方面包括用于通信电路的天线切换。 通信电路包括将通信电路耦合到用于射频（RF）信号发送和接收的第一天线和/或第二天线的天线切换电路。 与常规天线切换电路相比，天线切换电路被配置为包括更少的天线开关，以降低通信电路的成本和占地面积。 此外，通过减少天线切换电路中的天线开关的数量，可以改善第一天线和第二天线之间的RF隔离，从而导致通信电路的RF性能的改善。
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公开(公告)号：US09280163B2
公开(公告)日：2016-03-08
申请号：US13747725
申请日：2013-01-23
Applicant: RF Micro Devices, Inc.
Inventor： Michael R. Kay , Nadim Khlat
CPC classification number: G05F1/46 , H02M1/14 , H02M2001/0067 , H03F1/0227 , H03F1/26 , H03F3/24 , H03F2200/351 , H03F2200/451 , H03F2200/504 , H04B15/005
Abstract: This disclosure relates to radio frequency (RF) power converters and methods of operating the same. In one embodiment, an RF power converter includes an RF switching converter, a low-drop out (LDO) regulation circuit, and an RF filter. The RF filter is coupled to receive a pulsed output voltage from the RF switching converter and a supply voltage from the LDO regulation circuit. The RF filter is operable to alternate between a first RF filter topology and a second RF filter topology. In the first RF filter topology, the RF filter is configured to convert the pulsed output voltage from a switching circuit into the supply voltage. The RF filter in the second RF filter topology is configured to filter the supply voltage from the LDO regulation circuit to reduce a ripple variation in a supply voltage level of the supply voltage. As such, the RF filter provides greater versatility.
Abstract translation: 本公开涉及射频（RF）功率转换器及其操作方法。 在一个实施例中，RF功率转换器包括RF开关转换器，低压降（LDO）调节电路和RF滤波器。 RF滤波器被耦合以接收来自RF开关转换器的脉冲输出电压和来自LDO调节电路的电源电压。 RF滤波器可操作以在第一RF滤波器拓扑和第二RF滤波器拓扑之间交替。 在第一RF滤波器拓扑中，RF滤波器被配置为将来自开关电路的脉冲输出电压转换成电源电压。 第二RF滤波器拓扑中的RF滤波器被配置为对来自LDO调节电路的电源电压进行滤波，以减少电源电压的电源电压电平中的纹波变化。 因此，RF滤波器提供更大的通用性。
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