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    Envelope tracking with reduced circuit area and power consumption
    51.
    发明授权
    Envelope tracking with reduced circuit area and power consumption 有权

    公开(公告)号：US09634620B2

    公开(公告)日：2017-04-25

    申请号：US14959954

    申请日：2015-12-04

    Applicant: RF Micro Devices, Inc.

    Inventor： Nadim Khlat ,  Michael R. Kay

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

    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.

    Fast transition envelope tracking
    53.
    发明授权
    Fast transition envelope tracking 有权
    快速过渡包络跟踪

    公开(公告)号：US09516693B2

    公开(公告)日：2016-12-06

    申请号：US14838515

    申请日：2015-08-28

    Applicant: RF Micro Devices, Inc.

    Inventor： Nadim Khlat ,  Michael R. Kay

    IPC: H04B1/04 ,  H04W76/04

    CPC classification number: H04W76/27 ,  H03F1/0227 ,  H03F3/24 ,  H03F2200/102 ,  H04W52/0229 ,  H04W52/028 ,  Y02D70/142

    Abstract: Envelope power supply circuitry is operated in one of an off-state, a standby-state, and a transmit-state. In the standby-state, select components in envelope power converter circuitry in the envelope power supply circuitry are turned on in order to charge one or more inductive and/or capacitive elements therein to a maximum value necessary for supporting transmission of signals about a maximum output power. Accordingly, the envelope power supply circuitry is able to prepare to support transmission about any output power without knowing the output power ahead of time.

    Abstract translation: 信封电源电路以关闭状态，待机状态和发送状态之一工作。 在待机状态下，选择包络电源电路中的包络功率转换器电路中的组件被接通，以便将其中的一个或多个感应和/或电容元件充电到支持关于最大输出的信号传输所需的最大值 功率。 因此，信封电源电路能够准备支持关于任何输出功率的传输，而无需提前知道输出功率。

    Dual instantaneous envelope tracking
    55.
    发明授权
    Dual instantaneous envelope tracking 有权
    双重瞬时包络跟踪

    公开(公告)号：US09479118B2

    公开(公告)日：2016-10-25

    申请号：US14254215

    申请日：2014-04-16

    Applicant: RF Micro Devices, Inc.

    Inventor： Nadim Khlat ,  Baker Scott ,  Michael R. Kay

    IPC: H03G3/20 ,  H03F1/02 ,  H03F3/195 ,  H03F3/24

    CPC classification number: H03F1/0227 ,  H03F1/0266 ,  H03F3/19 ,  H03F3/195 ,  H03F3/245 ,  H03F2200/432 ,  H03F2200/451 ,  H03F2200/555

    Abstract: Power supply circuitry, which includes a parallel amplifier and a parallel amplifier power supply, is disclosed. The power supply circuitry operates in either an average power tracking mode or an envelope tracking mode. The parallel amplifier power supply provides a parallel amplifier power supply signal. The parallel amplifier regulates an envelope power supply voltage based on an envelope power supply control signal using the parallel amplifier power supply signal, which provides power for amplification. During the envelope tracking mode, the envelope power supply voltage at least partially tracks an envelope of an RF transmit signal and the parallel amplifier power supply signal at least partially tracks the envelope power supply control signal. During the average power tracking mode, the envelope power supply voltage does not track the envelope of the RF transmit signal.

    Abstract translation: 公开了包括并联放大器和并行放大器电源的电源电路。 电源电路在平均功率跟踪模式或包络跟踪模式下工作。 并联放大器电源提供并联放大器电源信号。 并联放大器基于包络电源控制信号，使用并联放大器电源信号来调节包络电源电压，该信号提供放大功率。 在包络跟踪模式期间，信封电源电压至少部分地跟踪RF发射信号的包络，并且并行放大器电源信号至少部分地跟踪包络电源控制信号。 在平均功率跟踪模式期间，包络电源电压不跟踪RF发射信号的包络。

    Multiple mode RF power converter
    56.
    发明授权
    Multiple mode RF power converter 有权

    公开(公告)号：US09377797B2

    公开(公告)日：2016-06-28

    申请号：US14702192

    申请日：2015-05-01

    Applicant: RF Micro Devices, Inc.

    Inventor： Michael R. Kay ,  Nadim Khlat

    IPC: G05F1/00 ,  G05F1/46

    CPC classification number: G05F1/468 ,  H02M1/10 ,  H02M2001/0067 ,  H03F1/0211 ,  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.

    DIRECT CURRENT (DC) VOLTAGE CONVERTER OPERATION MODE TRANSITION
    59.
    发明申请
    DIRECT CURRENT (DC) VOLTAGE CONVERTER OPERATION MODE TRANSITION 审中-公开
    直流电流（DC）电压转换器运行模式转换

    公开(公告)号：US20160056705A1

    公开(公告)日：2016-02-25

    申请号：US14831080

    申请日：2015-08-20

    Applicant: RF Micro Devices, Inc.

    Inventor： Mohammad Ahsanul Adeeb ,  Philippe Gorisse ,  Nadim Khlat ,  Michael R. Kay

    IPC: H02M1/00 ,  H02M3/158

    CPC classification number: H02M3/1582 ,  H02M3/156

    Abstract: 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.

    Abstract translation: 公开了一种配置成在操作模式之间转换的直流（DC）电压转换器。 在DC电压转换电路中提供电压选择电路以控制产生DC输出电压的降压 - 升压转换器。 与基于单个切换阈值在降压模式和升压模式之间切换降压 - 升压转换器的常规方法相反，电压选择电路被配置为基于降压模式和升压模式之间的降压 - 升压转换器 多电压阈值。 多个电压阈值中的每一个定义了直流输出电压的相应范围。 通过基于多个电压阈值控制降压 - 升压转换器，可以在降压模式和升压模式之间提供更平滑的转换，从而减小直流输出电压中的电压误差并提高直流电压转换电路的可靠性。

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