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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
发明人： Nadim Khlat , Michael R. Kay
CPC分类号： H03F3/19 , H03F1/0227 , H03F3/245 , H03F2200/102 , H03F2200/451
摘要： 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.
摘要翻译： 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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公开(公告)号：US09356643B2
公开(公告)日：2016-05-31
申请号：US13718148
申请日：2012-12-18
发明人： Nadim Khlat
CPC分类号： H04B1/44 , H04B1/525 , H04L5/1461
摘要： 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
发明人： Nadim Khlat
CPC分类号： H04W72/0446 , H04L5/001 , H04L5/1469
摘要： 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.
摘要翻译： 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
发明人： Nadim Khlat , Ruediger Bauder , Andrew F. Folkmann
CPC分类号： H04L5/14 , H04B1/0483
摘要： 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
发明人： Nadim Khlat
CPC分类号： H04B1/44 , H01Q21/28 , H04B7/0602 , H04B7/0686 , H04B7/0871 , H04L5/14
摘要： 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.
摘要翻译： 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
发明人： Michael R. Kay , Nadim Khlat
CPC分类号： G05F1/46 , H02M1/14 , H02M2001/0067 , H03F1/0227 , H03F1/26 , H03F3/24 , H03F2200/351 , H03F2200/451 , H03F2200/504 , H04B15/005
摘要： 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.
摘要翻译： 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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17.发明授权公开(公告)号：US09250643B2
公开(公告)日：2016-02-02
申请号：US13689940
申请日：2012-11-30
发明人： Nadim Khlat
CPC分类号： G05F3/02 , H02M1/143 , H02M3/156 , H02M2003/1586
摘要： Embodiments of circuitry, which includes power supply switching circuitry, a first inductive element, and a second inductive element, are disclosed. The power supply switching circuitry provides a first switching output signal to the first inductive element and a second switching output signal to the second inductive element. The first inductive element has a first inductor current and the second inductive element has a second inductor current. The second switching output signal is delayed from the first switching output signal by a switching signal delay. The first inductor current and the second inductor current combine to provide a combined inductor current, which has a frequency response with a group of notches, such that frequency locations of the group of notches are based on the switching signal delay.
摘要翻译： 公开了包括电源开关电路，第一电感元件和第二电感元件的电路的实施例。 电源开关电路向第一电感元件提供第一开关输出信号，并向第二电感元件提供第二开关输出信号。 第一电感元件具有第一电感器电流，并且第二电感元件具有第二电感器电流。 第二开关输出信号通过开关信号延迟从第一开关输出信号延迟。 第一电感器电流和第二电感器电流组合以提供组合电感器电流，其具有具有一组陷波的频率响应，使得该组陷波的频率位置基于开关信号延迟。
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公开(公告)号：US09247496B2
公开(公告)日：2016-01-26
申请号：US14072120
申请日：2013-11-05
发明人： Nadim Khlat
IPC分类号： H03C1/02 , H04W52/02 , H03F1/02 , H02M3/07 , H03F1/42 , H03F3/195 , H03F3/24 , H03F3/30 , H03F3/45 , H03F3/50 , H03F3/72 , H03G3/30
CPC分类号： H04W52/0209 , H02M3/07 , H03F1/02 , H03F1/0244 , H03F1/025 , H03F1/0277 , H03F1/42 , H03F3/195 , H03F3/245 , H03F3/3022 , H03F3/45475 , H03F3/505 , H03F3/72 , H03F2200/102 , H03F2200/204 , H03F2200/36 , H03F2200/375 , H03F2200/451 , H03F2200/555 , H03F2200/78 , H03F2203/45526 , H03F2203/45544 , H03F2203/45594 , H03F2203/45694 , H03F2203/45712 , H03F2203/45718 , H03F2203/7221 , H03G3/3042 , Y02D70/00
摘要： Configuration-feedback circuitry and transceiver circuitry are disclosed. The configuration-feedback circuitry regulates an output power from a radio frequency power amplifier based on a difference between a target output power from the radio frequency power amplifier and a measured output power from the radio frequency power amplifier. The transceiver circuitry regulates a modulated power supply voltage, which is used by the radio frequency power amplifier to provide power for amplification, based on the difference between the target output power from the radio frequency power amplifier and the measured output power from the radio frequency power amplifier.
摘要翻译： 公开了配置反馈电路和收发器电路。 配置反馈电路基于来自射频功率放大器的目标输出功率与来自射频功率放大器的测量输出功率之间的差异来调节来自射频功率放大器的输出功率。 收发器电路基于射频功率放大器的目标输出功率与来自射频功率的测量输出功率之间的差异来调节由射频功率放大器用于提供放大功率的调制电源电压 放大器
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19.发明授权公开(公告)号：US09246460B2
公开(公告)日：2016-01-26
申请号：US14072140
申请日：2013-11-05
IPC分类号： H03G3/00 , H03F3/04 , H03G3/30 , H02M3/07 , H02M3/158 , H03F1/02 , H03F3/24 , H03F3/45 , H02M1/00
CPC分类号： H03G3/3042 , H02M3/07 , H02M3/158 , H02M2001/0032 , H03F1/0227 , H03F3/24 , H03F3/45663 , Y02B70/16
摘要： A power management system, which includes a parallel amplifier circuit and a switch mode power supply converter, is disclosed. The switch mode power supply converter cooperatively operates with the parallel amplifier circuit to form the power management system. The power management system operates in one of a high power modulation mode, a medium power modulation mode, and a low power average power tracking mode. Further, during the high power modulation mode and the medium power modulation mode, the power management system controls a power amplifier supply voltage to a radio frequency power amplifier to provide envelope tracking. During the low power average power tracking mode, the power management system controls the power amplifier supply voltage to the radio frequency power amplifier to provide average power tracking.
摘要翻译： 公开了一种电源管理系统，其包括并联放大器电路和开关模式电源转换器。 开关模式电源转换器与并行放大器电路协同工作，形成电源管理系统。 电源管理系统以高功率调制模式，中等功率调制模式和低功率平均功率跟踪模式之一工作。 此外，在高功率调制模式和中等功率调制模式期间，电力管理系统控制向射频功率放大器的功率放大器电源电压以提供包络跟踪。 在低功率平均功率跟踪模式下，电源管理系统控制功率放大器对射频功率放大器的电源电压，以提供平均功率跟踪。
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公开(公告)号：US20160006398A1
公开(公告)日：2016-01-07
申请号：US14789464
申请日：2015-07-01
发明人： Nadim Khlat
CPC分类号： H03F1/0222 , H03F1/0233 , H03F3/245 , H03F2200/102 , H03F2200/129 , H03F2200/451 , H03F2200/504
摘要： An RF communications system, which includes an RF power amplifier, an envelope tracking power supply, and supply control circuitry, is disclosed. The RF communications system operates in one of a normal operation mode and a calibration mode. During the calibration mode, the RF power amplifier receives and amplifies an RF input signal to provide an RF transmit signal using an envelope power supply signal, which is provided by the envelope tracking power supply. Further, the supply control circuitry controls the envelope tracking power supply to cause a sharp transition of the envelope power supply signal when a setpoint of the envelope power supply signal transitions through a setpoint threshold of the envelope power supply signal.
摘要翻译： 公开了一种包括RF功率放大器，包络跟踪电源和供电控制电路的RF通信系统。 RF通信系统以正常操作模式和校准模式之一工作。 在校准模式期间，RF功率放大器接收并放大RF输入信号，以使用由包络跟踪电源提供的包络电源信号来提供RF发射信号。 此外，当包络电源信号的设定点转换到包络电源信号的设定点阈值时，电源控制电路控制包络跟踪电源以引起包络电源信号的急剧转变。
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