公开(公告)号：EP2649724B1

公开(公告)日：2015-01-21

申请号：EP11815602.5

申请日：2011-12-09

Applicant: RF Micro Devices, Inc.

Inventor： KHLAT, Nadim ,  KAY, Michael, R. ,  GORISSE, Philippe

IPC: H03F3/217

CPC classification number: H03F1/0227 ,  H03F3/217

公开(公告)号：EP2673880A2

公开(公告)日：2013-12-18

申请号：EP12706742.9

申请日：2012-02-07

Applicant: RF Micro Devices, Inc.

Inventor： KHLAT, Nadim ,  HORLANDER, Karl, F.

IPC: H03F1/02

CPC classification number: H03F1/0227 ,  H03F3/24 ,  H03F2200/411 ,  H03F2200/447 ,  H03F2200/465

Abstract: An open loop envelope tracking system calibration technique and circuitry are proposed. A radio frequency power amplifier receives a modulated signal. An envelope tracker power converter generates a modulated power amplifier supply voltage for the radio frequency power amplifier based on a control signal derived from the modulated signal. A first output power and a second output power of the radio frequency power amplifier are measured when the control signal is respectively delayed by a first delay period and a second delay period. A sensitivity of the output power of the radio frequency power amplifier is near a maximum near the first delay period and the second delay period. The first delay period and/or the second delay period are adjusted until the first output power substantially equals the second output power. The first delay period and the second delay period are used to obtain a calibrated fine tuning delay offset.

Abstract translation: 开环包络跟踪系统的校准技术和电路的提议。 一种射频功率放大器接收的调制信号。 包络跟踪器powerconverter基因率基于从调制信号得到的控制信号的射频功率放大器的调制功率放大器的电源电压。 的第一输出功率和射频功率放大器的第2输出功率进行测量。当控制信号是分别由第一延迟周期和第二延迟周期延迟。 所述射频功率放大器的输出功率的灵敏度是靠近第一延迟周期的最大和第二延迟周期的附近。 第一延迟周期和/或第二延迟周期被调节，直到所述第一输出功率基本上等于所述第二输出功率。 第一延迟周期和第二延迟周期被用于获得校准的微调延迟偏移。

公开(公告)号：EP2561611A1

公开(公告)日：2013-02-27

申请号：EP11720630.0

申请日：2011-04-19

Applicant: RF Micro Devices, Inc.

Inventor： KHLAT, Nadim ,  KAY, Michael, R.

IPC: H03F1/02 ,  H02M3/07 ,  H03F3/189 ,  H03F3/24

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：EP1878184A2

公开(公告)日：2008-01-16

申请号：EP06740532.4

申请日：2006-04-04

Applicant: RF Micro Devices, Inc.

Inventor： KHLAT, Nadim ,  BAUDER, Ruediger

IPC: H04L27/10

CPC classification number: H04L27/362 ,  H03F1/0205 ,  H03F3/24 ,  H03F2200/102 ,  H03F2200/451 ,  H03G3/3042 ,  H04W52/52

Abstract: Power control circuitry is provided for controlling an output power of a transmitter of a mobile terminal operating according to a continuous time transmit scheme such as Wideband Code Division Multiple Access (WCDMA). Transmit circuitry processes a quadrature baseband signal to provide a radio frequency transmit signal. The radio frequency transmit signal is coupled to the power control circuitry via a coupler and processed to provide a feedback amplitude signal. The power control circuitry operates to remove an amplitude modulation component from the feedback signal using a reference amplitude signal generated from the quadrature baseband signal, thereby providing a measured gain signal of the transmit circuitry. Based on the measured gain signal and a target output power, the power control circuitry operates to control a gain of the transmit circuitry such that the output power of the transmit circuitry is within a predetermined range about the target output power.

公开(公告)号：EP2649724A1

公开(公告)日：2013-10-16

申请号：EP11815602.5

申请日：2011-12-09

Applicant: RF Micro Devices, Inc.

Inventor： KHLAT, Nadim ,  KAY, Michael, R. ,  GORISSE, Philippe

IPC: H03F3/217

CPC classification number: H03F1/0227 ,  H03F3/217

Abstract: Embodiments disclosed in the detailed description relate to a pseudo-envelope follower power management system including a parallel amplifier and a switch mode power supply converter cooperatively coupled to generate a power supply voltage at a power supply output coupled to a linear RF power amplifier. The parallel amplifier output is in communication with the power amplifier supply output. The parallel amplifier governs operation of the switch mode power supply converter and regulates the power amplifier supply voltage base on a V
RAMP signal. The parallel amplifier circuit includes an open loop high frequency compensation assist circuit that generates a high frequency ripple compensation current based on an estimate of the high frequency ripple currents contained in a ripple current of the power inductor. The high frequency ripple compensation current is injected into the parallel amplifier circuit output to cancel out high frequency ripple currents at the power amplifier supply output.

公开(公告)号：EP1878184B1

公开(公告)日：2012-03-14

申请号：EP06740532.4

申请日：2006-04-04

Applicant: RF Micro Devices, Inc.

Inventor： KHLAT, Nadim ,  BAUDER, Ruediger

IPC: H04L27/10 ,  H03G3/30

CPC classification number: H04L27/362 ,  H03F1/0205 ,  H03F3/24 ,  H03F2200/102 ,  H03F2200/451 ,  H03G3/3042 ,  H04W52/52

Abstract: Power control circuitry is provided for controlling an output power of a transmitter of a mobile terminal operating according to a continuous time transmit scheme such as Wideband Code Division Multiple Access (WCDMA). Transmit circuitry processes a quadrature baseband signal to provide a radio frequency transmit signal. The radio frequency transmit signal is coupled to the power control circuitry via a coupler and processed to provide a feedback amplitude signal. The power control circuitry operates to remove an amplitude modulation component from the feedback signal using a reference amplitude signal generated from the quadrature baseband signal, thereby providing a measured gain signal of the transmit circuitry. Based on the measured gain signal and a target output power, the power control circuitry operates to control a gain of the transmit circuitry such that the output power of the transmit circuitry is within a predetermined range about the target output power.

公开(公告)号：EP2561611B1

公开(公告)日：2015-01-14

申请号：EP11720630.0

申请日：2011-04-19

Applicant: RF Micro Devices, Inc.

Inventor： KHLAT, Nadim ,  KAY, Michael, R.

IPC: H03F1/02 ,  H02M3/07 ,  H03F3/189 ,  H03F3/24

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

公开(公告)号：EP2705604A2

公开(公告)日：2014-03-12

申请号：EP12725911.7

申请日：2012-05-07

Applicant: RF Micro Devices, Inc.

Inventor： KHLAT, Nadim ,  KAY, Michael, R. ,  GORISSE, Philippe ,  NGO, Christopher, Truong

IPC: H03F1/32 ,  H03F1/02 ,  H03F3/195 ,  H03F3/24 ,  H04B17/00 ,  H03G3/00 ,  H03G3/30 ,  H03F3/217

Abstract: A pseudo-envelope tracking modulated power supply system, which is used to provide a power amplifier supply voltage to a radio frequency power amplifier, is disclosed. In a first embodiment, during a high power modulation mode and a medium power modulation mode, the power amplifier supply voltage provides envelope tracking. During a low power average power tracking mode, the power amplifier supply voltage provides average power tracking. In a second embodiment, an output power from the radio frequency power amplifier is regulated based on a difference between a target output power from the radio frequency power amplifier and a measured output power from the radio frequency power amplifier. The power amplifier supply voltage provides power for amplification, based on the difference between the target output power and the measured output power.