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公开(公告)号：US20130106508A1
公开(公告)日：2013-05-02
申请号：US13661552
申请日：2012-10-26
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Michael R. Kay , Philippe Gorisse
CPC classification number: H02M3/156 , H02M1/15 , H02M2001/0045 , H02M2001/0048 , H03F1/0216 , H03F3/2171 , Y02B70/1491
Abstract: A direct current (DC)-DC converter, which includes a parallel amplifier and a switching supply, is disclosed. The switching supply includes switching circuitry, a first inductive element, and a second inductive element. The parallel amplifier has a feedback input and a parallel amplifier output. The switching circuitry has a switching circuitry output. The first inductive element is coupled between the switching circuitry output and the feedback input. The second inductive element is coupled between the feedback input and the parallel amplifier output.
Abstract translation: 公开了一种包括并联放大器和开关电源的直流（DC）-DC转换器。 开关电源包括开关电路，第一电感元件和第二电感元件。 并联放大器具有反馈输入和并行放大器输出。 开关电路具有开关电路输出。 第一电感元件耦合在开关电路输出和反馈输入之间。 第二电感元件耦合在反馈输入端和并行放大器输出端之间。
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公开(公告)号：US10374652B2
公开(公告)日：2019-08-06
申请号：US14872800
申请日：2015-10-01
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat
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.
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公开(公告)号：US10009058B2
公开(公告)日：2018-06-26
申请号：US13943969
申请日：2013-07-17
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat
Abstract: RF front-end circuitry arranged to provide for RF Multiple-Input and Multiple-Output (MIMO) signals is disclosed. In one embodiment, the RF front-end circuitry may include an antenna port, a first multiple throw (MT) switch, and a second MT switch. The first MT switch is configured to selectively couple a first pole port to any one of a first set of throw ports, and the second MT switch is configured to selectively couple a second pole port to any one of a second set of throw ports. The first pole port of the first MT switch is coupled to the antenna port. More than one of the second set of throw ports of the second MT switch are coupled to transmit one or more receive MIMO signals to RF transceiver circuitry. Accordingly, the RF front-end circuitry routes receive MIMO signals from the antenna port to the RF transceiver circuitry.
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公开(公告)号：US09941844B2
公开(公告)日：2018-04-10
申请号：US15142725
申请日：2016-04-29
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat
IPC: H03F1/02 , H02M1/14 , H03F3/195 , H03F3/24 , H03F3/19 , H04B1/04 , H04W52/02 , H03F3/68 , H04W88/06
CPC classification number: H03F1/0227 , H02M1/14 , H03F1/02 , H03F1/0233 , H03F3/19 , H03F3/195 , H03F3/245 , H03F3/68 , H03F2200/102 , H03F2200/105 , H03F2200/111 , H03F2200/451 , H03F2200/48 , H03F2203/21181 , H04B1/04 , H04W52/0209 , H04W88/06 , Y02D70/00 , Y02D70/142
Abstract: Envelope tracking power converter circuitry is configured to receive a supply voltage and simultaneously provide a first envelope tracking power supply signal for amplifying a first RF input signal and a second envelope tracking signal for amplifying a second RF input signal.
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公开(公告)号：US09929761B2
公开(公告)日：2018-03-27
申请号：US15062693
申请日：2016-03-07
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Marcus Granger-Jones
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.
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Patent Agency Ranking
公开(公告)号：US09929752B2
公开(公告)日：2018-03-27
申请号：US14681725
申请日：2015-04-08
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Marcus Granger-Jones
CPC classification number: H04B1/0057 , H04B1/18 , H04B7/01 , H04B7/0837
Abstract: A first RF receive diplexer, which includes a first hybrid RF coupler, a second hybrid RF coupler, and RF filter circuitry, is disclosed. The first hybrid RF coupler has a first main port, a first pair of quadrature ports, and a first isolation port, which is coupled to an RF antenna. The second hybrid RF coupler has a second main port and a second pair of quadrature ports. The RF filter circuitry is coupled between the first pair of quadrature ports and the second pair of quadrature ports. The first RF receive diplexer receives a first adjunct RF antenna receive signal via the first isolation port to provide a first adjunct RF receive signal via the second main port. The first RF receive diplexer receives a first RF transmit signal via the first main port to provide a first RF antenna transmit signal via the first isolation port.
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公开(公告)号：US09859943B2
公开(公告)日：2018-01-02
申请号：US14498991
申请日：2014-09-26
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat
CPC classification number: H04B1/40 , H04B1/0057 , H04B7/0413 , H04B15/00 , H04L5/08 , H04L5/14
Abstract: A first RF diplexer, which includes a first RF highpass with tunable notch filter and a first RF lowpass with tunable notch filter, is disclosed. The first RF diplexer has a first main port, a second main port, and a first common port. The first RF highpass with tunable notch filter is coupled between the first main port and the first common port. The first RF lowpass with tunable notch filter is coupled between the second main port and the first common port. The first RF highpass with tunable notch filter has a first highpass notch frequency, which is tunable. The first RF lowpass with tunable notch filter has a first lowpass notch frequency, which is tunable.
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公开(公告)号：US09768838B2
公开(公告)日：2017-09-19
申请号：US14820006
申请日：2015-08-06
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Marcus Granger-Jones
CPC classification number: H04B7/01 , H04B1/0057 , H04B1/18 , H04B1/58 , H04B7/0837
Abstract: A reconfigurable RF receive diplexer, which includes a first hybrid RF coupler, a second hybrid RF coupler, and reconfigurable RF filter circuitry, is disclosed. The reconfigurable RF receive diplexer receives a first adjunct RF antenna receive signal via a first isolation port to provide a first adjunct RF receive signal via a second main port. The reconfigurable RF receive diplexer further receives a first RF transmit signal via a first main port to provide a first RF antenna transmit signal via the first isolation port. The reconfigurable RF receive diplexer operates in each of a group of operating modes, such that during a first operating mode, a carrier frequency of the first adjunct RF antenna receive signal is within a first RF communications band; and during a second operating mode, a carrier frequency of the first adjunct RF antenna receive signal is within a second RF communications band.
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公开(公告)号：US09735854B2
公开(公告)日：2017-08-15
申请号：US15130380
申请日：2016-04-15
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Marcus Granger-Jones
IPC: H04B1/44 , H04B7/08 , H04B1/00 , H04B1/3827
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.
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公开(公告)号：US09722639B2
公开(公告)日：2017-08-01
申请号：US14267095
申请日：2014-05-01
Applicant: RF Micro Devices, Inc.
Inventor： Nadim Khlat , Marcus Granger-Jones
CPC classification number: H04B1/0064 , H04L5/001 , H04L5/0041
Abstract: Front end circuitry for a wireless communication system includes a first antenna node, a second antenna node, a first triplexer, a second triplexer, and front end switching circuitry coupled between the first triplexer, the second triplexer, the first antenna node, and the second antenna node. The front end switching circuitry is configured to selectively couple the first triplexer to one of the first antenna node and the second antenna node and couple the second triplexer to a different one of the first antenna node and the second antenna node. By using a first triplexer and a second triplexer in the mobile front end circuitry, the mobile front end circuitry may operate in one or more carrier aggregation configurations while reducing the maximum load presented to the first antenna node and the second antenna node, thereby improving the performance of the front end circuitry.
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