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    Direct current (DC) voltage converter operation mode transition
    12.
    发明授权
    Direct current (DC) voltage converter operation mode transition 有权

    公开(公告)号：US10090762B2

    公开(公告)日：2018-10-02

    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: H02M3/156 ,  H02M3/158

    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.

    Dual instantaneous envelope tracking
    13.
    发明授权
    Dual instantaneous envelope tracking 有权

    公开(公告)号：US09444407B2

    公开(公告)日：2016-09-13

    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

    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.

    SMOOTH TRANSITIONING BUCK-BOOST DC-DC CONVERTER
    16.
    发明申请
    SMOOTH TRANSITIONING BUCK-BOOST DC-DC CONVERTER 有权
    SMOOTH TRANSITIONING BUCK-BOOST DC-DC转换器

    公开(公告)号：US20160028305A1

    公开(公告)日：2016-01-28

    申请号：US14808119

    申请日：2015-07-24

    Applicant: RF Micro Devices, Inc.

    Inventor： Michael R. Kay ,  Manbir Singh Nag

    IPC: H02M3/04

    CPC classification number: H02M3/1582 ,  H02M3/07 ,  H02M3/1584 ,  H02M2001/0003 ,  H02M2001/0045 ,  H02M2001/4291 ,  H02M2003/1586 ,  H03F3/38

    Abstract: A buck-boost DC-DC converter, which includes converter control circuitry, converter switching circuitry, and a first inductive element, is disclosed. The converter control circuitry provides a buck mode timing signal and a boost mode timing signal. The converter switching circuitry provides a switching output signal. During a buck mode of the buck-boost DC-DC converter, when a buck pulse-width of the switching output signal is less than a buck pulse-width threshold, the buck pulse-width is limited based on both the buck mode timing signal and the boost mode timing signal. During a boost mode of the buck-boost DC-DC converter, when a boost pulse-width of the switching output signal is less than a boost pulse-width threshold, the boost pulse-width is limited based on both the buck mode timing signal and the boost mode timing signal. The first inductive element receives and filters the switching output signal to provide a converter output signal.

    Abstract translation: 公开了包括转换器控制电路，转换器开关电路和第一电感元件的降压 - 升压DC-DC转换器。 转换器控制电路提供降压模式定时信号和升压模式定时信号。 转换器切换电路提供开关输出信号。 在降压 - 升压DC-DC转换器的降压模式期间，当开关输出信号的降压脉冲宽度小于降压脉冲宽度阈值时，降压脉冲宽度基于降压模式定时信号 和升压模式定时信号。 在降压 - 升压DC-DC转换器的升压模式期间，当开关输出信号的升压脉冲宽度小于升压脉冲宽度阈值时，升压脉冲宽度基于两个降压模式定时信号 和升压模式定时信号。 第一电感元件接收和滤波开关输出信号以提供转换器输出信号。

    Multiple mode RF power converter
    18.
    发明授权
    Multiple mode RF power converter 有权
    多模RF功率转换器

    公开(公告)号：US09041365B2

    公开(公告)日：2015-05-26

    申请号：US13747694

    申请日：2013-01-23

    Applicant: RF Micro Devices, Inc.

    Inventor： Michael R. Kay ,  Nadim Khlat

    IPC: G05F1/00 ,  G05F1/46 ,  H02M1/10 ,  H03F1/02 ,  H03F1/26 ,  H03F3/24 ,  H04B15/00 ,  H02M1/00

    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.

    Abstract translation: 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。

    TRANSITIONING FROM ENVELOPE TRACKING TO AVERAGE POWER TRACKING
    20.
    发明申请
    TRANSITIONING FROM ENVELOPE TRACKING TO AVERAGE POWER TRACKING 有权
    从包装跟踪到平均功率跟踪的转换

    公开(公告)号：US20140111178A1

    公开(公告)日：2014-04-24

    申请号：US14056292

    申请日：2013-10-17

    Applicant: RF Micro Devices, Inc.

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

    IPC: G05F1/46

    CPC classification number: G05F1/46 ,  H03F1/0211 ,  H03F1/0227 ,  H03F1/3223 ,  H03F3/189 ,  H03F3/24 ,  H03F2200/102 ,  H03F2200/432 ,  H04B2001/0441

    Abstract: An envelope tracking power supply and an offset capacitive element are disclosed. The offset capacitive element is coupled between a switching output and an analog output of the envelope tracking power supply, which operates in one of an envelope tracking mode, a transition mode, and an average power tracking mode. During the envelope tracking mode, the envelope tracking power supply provides an envelope power supply signal using both the switching output and the analog output. During the transition mode, the envelope tracking power supply drives a voltage across the offset capacitive element from a first voltage to a second voltage, such that during a transition from the envelope tracking mode to the transition mode, the offset capacitive element has the first voltage, and during a transition from the transition mode to the average power tracking mode, the offset capacitive element has the second voltage.

    Abstract translation: 公开了一种包络跟踪电源和偏移电容元件。 偏移电容元件耦合在包络跟踪电源的开关输出和模拟输出之间，其以包络跟踪模式，转换模式和平均功率跟踪模式之一工作。 在包络跟踪模式期间，包络跟踪电源使用开关输出和模拟输出两者提供包络电源信号。 在转换模式期间，包络跟踪电源将偏移电容元件上的电压从第一电压驱动到第二电压，使得在从包络跟踪模式转换到转换模式期间，偏移电容元件具有第一电压 ，并且在从转换模式到平均功率跟踪模式的转变期间，偏移电容元件具有第二电压。

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