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公开(公告)号：US20130176912A1
公开(公告)日：2013-07-11
申请号：US13726782
申请日：2012-12-26
发明人： Nadim Khlat
IPC分类号： H04L5/14
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：US20130141169A1
公开(公告)日：2013-06-06
申请号：US13692084
申请日：2012-12-03
发明人： Nadim Khlat , Philippe Gorisse
IPC分类号： H03F1/02
CPC分类号： H03F1/0211 , H03F1/0227 , H03F3/245 , H03F2200/459 , H03F2200/511
摘要： Circuitry, which includes a linear amplifier and a linear amplifier power supply, is disclosed. The linear amplifier at least partially provides an envelope power supply signal to a radio frequency (RF) power amplifier (PA) using a selected one of a group of linear amplifier supply voltages. The linear amplifier power supply provides at least one of the group of linear amplifier supply voltages. Selection of the selected one of the group of linear amplifier supply voltages is based on a desired voltage of the envelope power supply signal.
摘要翻译： 公开了包括线性放大器和线性放大器电源的电路。 线性放大器至少部分地使用一组线性放大器电源电压中的所选择的一个向射频（RF）功率放大器（PA）提供包络电源信号。 线性放大器电源提供至少一组线性放大器电源电压。 所选择的一组线性放大器电源电压的选择是基于包络电源信号的期望电压。
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53.发明申请公开(公告)号：US20130134956A1
公开(公告)日：2013-05-30
申请号：US13689940
申请日：2012-11-30
发明人： Nadim Khlat
IPC分类号： G05F3/02
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：US20130121217A1
公开(公告)日：2013-05-16
申请号：US13732935
申请日：2013-01-02
发明人： Nadim Khlat
IPC分类号： H04L5/14
CPC分类号： H04L5/14 , H04B1/0057
摘要： The present disclosure relates to a split-band duplexer architecture that takes advantage of a relationship between a frequency division duplex (FDD) transmit band, an FDD receive band, and a time division duplex (TDD) band, which has frequencies located between FDD transmit band frequencies and FDD receive band frequencies. As such, by splitting the FDD receive and transmit bands into two sub-bands, two separate sub-band duplexers may be used to fully support the FDD receive and transmit bands. Further, a passband of one of the sub-band duplexers may be widened to support the TDD band while transmitting, and a passband of the other of the sub-band duplexers may be widened to support the TDD band while receiving. By using sub-band duplexers, isolation margins and insertion loss margins may be increased, which may allow use of standard filter components, such as surface acoustic wave (SAW) filters.
摘要翻译： 本公开涉及一种分频带双工器架构，其利用频分双工（FDD）发射频带，FDD接收频带和时分双工（TDD）频带之间的关系，频带位于FDD发射之间 频带频率和FDD接收频带频率。 因此，通过将FDD接收和发送频带分成两个子带，可以使用两个单独的子带双工器来完全支持FDD接收和发送频带。 此外，可以扩展子带双工器之一的通带以在发送时支持TDD频带，并且可以扩展另一个子带双工器的通带以在接收时支持TDD频带。 通过使用子带双工器，可以增加隔离余量和插入损耗裕度，这可以允许使用诸如表面声波（SAW）滤波器的标准滤波器组件。
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公开(公告)号：US10312960B2
公开(公告)日：2019-06-04
申请号：US14926116
申请日：2015-10-29
发明人： Nadim Khlat
摘要： A switchable 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. The group of RF TX bandpass filters includes a first RF TX bandpass filter and a second RF TX bandpass filter, such that each of the first RF TX bandpass filter and the second RF TX bandpass filter is coupled to a first filter connection node. The group of RF TX switching elements includes a first RF TX switching element coupled between the first filter connection node and a first common connection node, which is coupled to a first RF antenna. Each of the group of RF RX bandpass filters is coupled to the first common connection node.
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公开(公告)号：US10250290B2
公开(公告)日：2019-04-02
申请号：US13953808
申请日：2013-07-30
发明人： Nadim Khlat
摘要： This disclosure relates generally to radio frequency (RF) front-end circuitry for different types of carrier aggregation, along with methods of operating the same. In one embodiment, the RF front-end circuitry includes a first diplexer, a second diplexer, first antenna selection circuitry, and second antenna selection circuitry. In order to maintain adequate isolation between high bands and low bands but provide carrier aggregation, the first antenna selection circuitry is configured to selectively couple each of a first plurality of RF ports to any one of a first low band port in the first diplexer and a second low band port in the second diplexer, while the second antenna selection circuitry is configured to selectively couple each of the second plurality of RF ports to any one of a first high band port in the first diplexer and a second high band port in the second diplexer.
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公开(公告)号：US10224759B2
公开(公告)日：2019-03-05
申请号：US14792891
申请日：2015-07-07
发明人： Nadim Khlat
摘要： Aspects disclosed in the detailed description include a wireless charging circuit comprising a radio frequency (RF) power harvesting circuit. In one aspect, the RF power harvesting circuit is configured to harvest a wireless RF charging signal provided by a wireless charging station to generate a direct-current (DC) charging signal to charge a battery, for example, a lithium-ion (Li-ion) battery, in a battery-operated electronic device. In another aspect, a wireless charging controller controls the RF power harvesting circuit to dynamically increase or decrease an effective charging power of the DC charging signal according to a target charging power determined according to a charging profile of the battery. By dynamically adjusting the effective charging power provided to the battery according to the charging profile of the battery, it is possible to provide fast charging to the battery while protecting the battery from overcharging damage.
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公开(公告)号：US10090762B2
公开(公告)日：2018-10-02
申请号：US14831080
申请日：2015-08-20
摘要： 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.
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公开(公告)号：US09899986B2
公开(公告)日：2018-02-20
申请号：US14547502
申请日：2014-11-19
发明人： Nadim Khlat , Marcus Granger-Jones
CPC分类号： H03H7/463 , H03H7/48 , H04B1/0057 , H04B1/40 , H04B1/50 , H04B10/556 , H04L5/08 , H04L27/2085
摘要： Embodiments of a tunable radio frequency (RF) diplexer and methods of operating the same are disclosed. In one embodiment, the RF diplexer includes a first hybrid coupler, a second hybrid coupler, an RF filter circuit, and a phase inversion component. Both the RF filter circuit and the phase inversion component are connected between the first hybrid coupler and the second hybrid coupler. The phase inversion component is configured to provide approximately a differential phase. The RF filter circuit is configured to provide a passband and a notch. The RF filter circuit is tunable to provide the notch on both a high-frequency side of the passband and a low frequency side of the passband. Accordingly, the tunable RF diplexer provides lower insertion losses and higher isolation regardless of whether the one of the diplexed frequency bands is set at higher frequencies or lower frequencies than the other diplexed frequency band.
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60.发明授权公开(公告)号：US09837984B2
公开(公告)日：2017-12-05
申请号：US15004084
申请日：2016-01-22
CPC分类号： H03H9/542 , H03H9/605 , H03H9/6483 , H03H9/6489
摘要： 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.
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