公开(公告)号：US20170207846A1

公开(公告)日：2017-07-20

申请号：US15130380

申请日：2016-04-15

Applicant: RF Micro Devices, Inc.

Inventor： Nadim Khlat ,  Marcus Granger-Jones

IPC: H04B7/08 ,  H04B1/3827 ,  H04B1/00

CPC classification number: H04B7/0868 ,  H04B1/0057 ,  H04B1/3827 ,  H04B7/0686

Abstract: The present disclosure relates to antenna swapping for a wireless, e.g., cellular, radio system. In particular, embodiments of a single-die antenna swapping switching circuit are disclosed. In some embodiments, the single-die antenna swapping switching circuit enables antenna swapping in a wireless device using only two coaxial cables or transmission line connections regardless of an order of an antenna multiplexer of the wireless device. This results in significant space savings, particularly as the order of the antenna multiplexer increases, compared to antenna swapping techniques that require a pair of coaxial cables or transmission lines for each order of the antenna multiplexer. In addition, the single-die antenna swapping switching circuit is designed to be located between a radio front-end system and the antenna multiplexer such that intermodulation distortion and harmonics resulting from the switches comprised in the single-die antenna swapping switching circuit are mitigated.

公开(公告)号：US09654151B2

公开(公告)日：2017-05-16

申请号：US15083791

申请日：2016-03-29

Applicant: RF Micro Devices, Inc.

Inventor： Nadim Khlat ,  Marcus Granger-Jones

IPC: H04B1/00 ,  H04B1/3805 ,  H04B1/48 ,  H04B7/06 ,  H04B7/08

CPC classification number: H04B1/006 ,  H04B1/3805 ,  H04B1/48 ,  H04B7/0602 ,  H04B7/0805

Abstract: RF front end circuitry includes primary transceiver circuitry associated with a primary antenna and secondary receiver circuitry associated with a secondary antenna. Generally, the primary transceiver circuitry and the primary antenna are located on one end of a mobile communications device, while the secondary receiver circuitry and the secondary antenna are located at an opposite end of the device. Cross-coupling connection lines run between the antenna switching circuitry for the primary antenna and the secondary antenna, and are reused to send a portion of primary RF transmit signals from the primary transceiver circuitry to the secondary receiver circuitry so that primary RF transmit signals coupled into the secondary receiver path via antenna-to-antenna coupling can be reduced.

公开(公告)号：US09628045B2

公开(公告)日：2017-04-18

申请号：US14449913

申请日：2014-08-01

Applicant: RF Micro Devices, Inc.

Inventor： Dirk Robert Walter Leipold ,  George Maxim ,  Baker Scott ,  Nadim Khlat ,  Jayanti Jaganatha Rao

IPC: H03H7/46 ,  H03H7/01 ,  H03F1/56 ,  H03F3/193 ,  H03F3/24 ,  H03F3/68 ,  H03F3/72 ,  H03H7/09

CPC classification number: H03H7/465 ,  H03F1/565 ,  H03F3/193 ,  H03F3/245 ,  H03F3/68 ,  H03F3/72 ,  H03F2200/111 ,  H03F2200/267 ,  H03F2200/391 ,  H03F2200/451 ,  H03F2203/7209 ,  H03H7/0115 ,  H03H7/09 ,  H03H7/1775 ,  H03H2210/012 ,  H03H2210/025 ,  H03H2210/04

Abstract: RF communications circuitry, which includes a first tunable RF filter and a second tunable RF filter, is disclosed. The first tunable RF filter is coupled to the second tunable RF filter. The RF communications circuitry operates in one of a first operating mode and a second operating mode. During the first operating mode, the second tunable RF filter receives and filters an upstream RF signal to provide a filtered RF signal. Further, during the first operating mode, the first tunable RF filter augments a frequency response of the second tunable RF filter.

公开(公告)号：US09621113B2

公开(公告)日：2017-04-11

申请号：US14638374

申请日：2015-03-04

Applicant: RF Micro Devices, Inc.

Inventor： Nadim Khlat ,  Michael R. Kay

IPC: H03G3/00 ,  H03F1/02 ,  H03F3/189 ,  H03F3/24 ,  H03F3/19 ,  H03F3/21 ,  H02M3/07

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.

公开(公告)号：US09608688B2

公开(公告)日：2017-03-28

申请号：US14498746

申请日：2014-09-26

Applicant: RF Micro Devices, Inc.

Inventor： Nadim Khlat

IPC: H04B15/00 ,  H04B1/40 ,  H04L5/14 ,  H04B1/00 ,  H04L5/08 ,  H04B7/0413

CPC classification number: H04B1/40 ,  H04B1/0057 ,  H04B7/0413 ,  H04B15/00 ,  H04L5/08 ,  H04L5/14

Abstract: A first RF diplexer, which includes a first hybrid RF coupler, a second hybrid RF coupler, a first RF filter, and a second RF filter, is disclosed. The first hybrid RF coupler has a first main port, a first in-phase port, a first quadrature-phase port, and a first isolation port, which is coupled to a primary RF antenna. The second hybrid RF coupler has a second main port, a second in-phase port, and a second quadrature-phase port. The first RF filter is coupled between the first in-phase port and the second in-phase port. The second RF filter is coupled between the first quadrature-phase port and the second quadrature-phase port.

公开(公告)号：US09595981B2

公开(公告)日：2017-03-14

申请号：US14836634

申请日：2015-08-26

Applicant: RF Micro Devices, Inc.

Inventor： Nadim Khlat

IPC: H04B1/04 ,  H03F3/19 ,  H03F1/02 ,  H03F1/32 ,  H03F3/24

CPC classification number: H04B1/0475 ,  H03F1/0227 ,  H03F1/3241 ,  H03F3/19 ,  H03F3/245 ,  H03F2200/102 ,  H03F2200/451 ,  H04B2001/0416

Abstract: Envelope power supply circuitry includes an envelope power converter circuitry and envelope tracking circuitry. The envelope power converter circuitry receives an envelope power converter control signal from the envelope tracking circuitry and a supply voltage and provides an envelope power supply signal for an amplifier based thereon. In a first mode of operation, the envelope power converter control signal is provided such that the envelope power supply signal causes the gain of the amplifier to remain substantially constant over a range of input power provided to the amplifier. In a second mode of operation, the envelope power converter control signal is provided such that the envelope power supply signal remains substantially constant for values within the range of input power below a predetermined threshold, and such that the envelope power supply signal causes the gain of the amplifier to remain substantially constant for other values.

Abstract translation: 信封电源电路包括一个信封电源转换器电路和信封跟踪电路。 信封功率转换器电路从包络跟踪电路接收包络功率转换器控制信号和电源电压，并且基于此为放大器提供包络电源信号。 在第一操作模式中，提供包络电力转换器控制信号，使得包络电源信号使放大器的增益在提供给放大器的输入功率的范围内保持基本恒定。 在第二操作模式中，提供包络功率转换器控制信号，使得对于在低于预定阈值的输入功率范围内的值，包络电源信号保持基本上恒定，并且使得包络电源信号导致 放大器对于其他值保持基本恒定。

公开(公告)号：US20160373176A1

公开(公告)日：2016-12-22

申请号：US15084142

申请日：2016-03-29

Applicant: RF Micro Devices, Inc.

Inventor： Nadim Khlat ,  Marcus Granger-Jones

IPC: H04B7/06 ,  H04B1/401 ,  H04B1/00

CPC classification number: H04B7/0608 ,  H04B1/0053 ,  H04B1/0064 ,  H04B1/0458 ,  H04B1/18 ,  H04B1/401 ,  H04B7/0602 ,  H04B7/0802

Abstract: Antenna swapping circuitry includes a first pole, a second pole, a first throw, a second throw, and a number of switching elements. A first switching element is coupled between the first pole and the first throw. A second switching element is coupled between the first pole and the second throw. A third switching element is coupled between the second pole and the first throw. A fourth switching element is coupled between the second pole and the second throw. A linearity of the first switching element and the fourth switching element is higher in a closed state of operation than in an open state of operation. A linearity of the second switching element and a third switching element is higher in an open state of operation than in a closed state of operation.

Abstract translation: 天线交换电路包括第一极，第二极，第一掷，第二掷和多个开关元件。 第一开关元件连接在第一极和第一掷之间。 第二开关元件耦合在第一极和第二掷之间。 第三开关元件耦合在第二极和第一掷之间。 第四开关元件耦合在第二极和第二掷之间。 在闭合运行状态下，第一开关元件和第四开关元件的线性度高于开启操作状态。 第二开关元件和第三开关元件的线性度在打开操作状态下高于在关闭操作状态。

公开(公告)号：US09494962B2

公开(公告)日：2016-11-15

申请号：US13689922

申请日：2012-11-30

Applicant: RF Micro Devices, Inc.

Inventor： Nadim Khlat ,  Michael R. Kay

IPC: G05F3/24 ,  G05F1/575 ,  H02M3/156 ,  G05F3/04 ,  G05F3/06 ,  G05F3/02 ,  H02M1/14 ,  H02M3/155 ,  H02M3/158

CPC classification number: G05F3/02 ,  H02M1/14 ,  H02M3/155 ,  H02M2003/1586

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US09484797B2

公开(公告)日：2016-11-01

申请号：US13661227

申请日：2012-10-26

Applicant: RF Micro Devices, Inc.

Inventor： Nadim Khlat

IPC: G05F1/00 ,  H02M1/15 ,  H02M3/156

CPC classification number: H02M1/15 ,  H02M3/156

Abstract: This disclosure relates generally to radio frequency (RF) switching converters and RF amplification devices that use RF switching converters. In one embodiment, an RF switching converter includes a switching circuit operable to receive a power source voltage, a switching controller configured to switch the switching circuit so that the switching circuit generates a pulsed output voltage from the power source voltage, and an RF filter configured to convert the pulsed output voltage into a supply voltage, wherein the RF filter includes a decoupling capacitor configured to receive the supply voltage. The switching controller is configured to generate a ripple correction current that is injected into the decoupling capacitor such that the decoupling capacitor filters the ripple correction current. The decoupling capacitor outputs the ripple correction current such that the ripple correction current reduces a ripple variation in a supply current level of a supply current resulting from the supply voltage.

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。 在一个实施例中，RF开关转换器包括可操作以接收电源电压的开关电路，被配置为切换开关电路以使得开关电路从电源电压产生脉冲输出电压的开关控制器，以及配置 将脉冲输出电压转换成电源电压，其中RF滤波器包括被配置为接收电源电压的去耦电容器。 开关控制器被配置为产生纹波校正电流，其被注入到去耦电容器中，使得去耦电容器对纹波校正电流进行滤波。 去耦电容器输出纹波校正电流，使得纹波校正电流减小由电源电压产生的电源电流的电源电流电平中的纹波变化。

公开(公告)号：US20160308576A1

公开(公告)日：2016-10-20

申请号：US15062693

申请日：2016-03-07

Applicant: RF Micro Devices, Inc.

Inventor： Nadim Khlat ,  Marcus Granger-Jones

IPC: H04B1/48 ,  H04L5/14 ,  H04B1/3827

CPC classification number: H04B1/18 ,  H03F3/24 ,  H03F2200/294 ,  H03F2200/451 ,  H04B1/0458 ,  H04B2001/0408 ,  H04L5/1469

Abstract: This disclosure relates to radio frequency (RF) front end circuitry for portable communication devices. In one embodiment, the RF front end circuitry includes an antenna, a switchable receive path configured to be opened and to be closed, a coaxial cable, and a low noise amplifier (LNA). The LNA is coupled so as to drive the coaxial cable. Thus, when the switchable receive path is closed, an RF receive signal received by the antenna can propagate through the switchable receive path to the LNA. Since the LNA is driving the coaxial cable, the RF receive signal can propagate through the coaxial cable without being excessively degraded. In this manner, embodiments of the RF front end circuitry can be utilized to provide antenna swapping and RF transceiver circuitry coupled to the coaxial cable can receive the RF receive signal from the coaxial cable without excessive degradation.

Abstract translation: 本公开涉及用于便携式通信设备的射频（RF）前端电路。 在一个实施例中，RF前端电路包括天线，被配置为打开和关闭的可切换接收路径，同轴电缆和低噪声放大器（LNA）。 LNA耦合以驱动同轴电缆。 因此，当可切换接收路径闭合时，由天线接收的RF接收信号可以通过可切换的接收路径传播到LNA。 由于LNA驱动同轴电缆，RF接收信号可以通过同轴电缆传播而不会过度劣化。 以这种方式，可以利用RF前端电路的实施例来提供天线交换，耦合到同轴电缆的RF收发器电路可以从同轴电缆接收RF接收信号而不会过度降级。