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公开(公告)号：US20150155834A1
公开(公告)日：2015-06-04
申请号：US14581630
申请日：2014-12-23
发明人： David Steven Ripley , Sabah Khesbak , Benjamin Bartram , Kevin Lee Cobley , Robert Astle Henshaw , Julian Hildersley , Robert John Thompson
CPC分类号： H04B17/13 , H03F1/0211 , H03F1/0216 , H03F1/0222 , H03F1/0227 , H03F1/025 , H03F1/30 , H03F1/301 , H03F1/32 , H03F1/56 , H03F3/19 , H03F3/193 , H03F3/21 , H03F3/211 , H03F3/245 , H03F3/68 , H03F3/72 , H03F2200/102 , H03F2200/108 , H03F2200/111 , H03F2200/15 , H03F2200/387 , H03F2200/405 , H03F2200/429 , H03F2200/451 , H03F2200/462 , H03F2200/465 , H03F2200/471 , H03F2200/507 , H03F2200/511 , H03F2203/21106 , H03G3/30 , H03G3/3036 , H03G3/3042 , H04B1/40 , H04W88/02
摘要： Apparatus and methods for envelope tracking calibration are provided. In one embodiment, a power amplifier system includes a power amplifier, an envelope tracker that generates the power amplifier's supply voltage, a power detector, and a calibration module. The envelope tracker includes an envelope shaping table generated at a desired gain compression and a scaling module that scales an amplitude of an envelope signal. The power detector measures the power amplifier's output power, and the calibration module provides calibration data to the scaling module to change the scaling of the envelope signal's amplitude. The calibration module sets the calibration data to a first value corresponding to a supply voltage level associated with substantially no gain compression, and reduces the supply voltage level by changing the calibration data until the power detector indicates that the gain compression of the power amplifier is about equal to the desired gain compression.
摘要翻译： 提供用于包络跟踪校准的装置和方法。 在一个实施例中，功率放大器系统包括功率放大器，产生功率放大器电源电压的封装跟踪器，功率检测器和校准模块。 包络跟踪器包括以期望的增益压缩生成的包络整形表和缩放包络信号的幅度的缩放模块。 功率检测器测量功率放大器的输出功率，校准模块向定标模块提供校准数据，以改变包络信号幅度的缩放。 校准模块将校准数据设置为对应于与基本上没有增益压缩相关联的电源电压电平的第一值，并且通过改变校准数据来降低电源电压，直到功率检测器指示功率放大器的增益压缩为约 等于所需的增益压缩。
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公开(公告)号：US12063133B2
公开(公告)日：2024-08-13
申请号：US17839077
申请日：2022-06-13
CPC分类号： H04L27/2613 , H04B7/0602 , H04B7/0604 , H04L5/0048 , H04L5/0051 , H04L27/2605
摘要： Apparatus and methods for sounding reference signal (SRS) switching are provided. In certain embodiments, a controller internal to the power amplifier module initiates a sequence of instructions, in response to a single command from UE. The instructions cause a reduction in gain of the power amplifier, and initiate a delay. The antennas switch actuates after the delay to switch from a first antenna to a second antenna. The teachings herein can be used to avoid over-power on the power amplifier and antenna switch.
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公开(公告)号：US12063014B2
公开(公告)日：2024-08-13
申请号：US17580549
申请日：2022-01-20
CPC分类号： H03F1/523 , H01L27/0266 , H03F3/195 , H03F2200/441 , H03F2200/451
摘要： Amplifier having electrostatic discharge and surge protection circuit. In some embodiments, a radio-frequency integrated circuit can include an amplifier, a controller configured to control operation of the amplifier, and a clamp circuit configured to provide electrostatic discharge protection and surge protection for either or both of the amplifier and the controller. The clamp circuit can include a feedback combination clamp implemented to direct a current associated with either or both of an electrostatic discharge and a surge at a first node to a second node.
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4.发明公开公开(公告)号：US20240113671A1
公开(公告)日：2024-04-04
申请号：US18471593
申请日：2023-09-21
CPC分类号： H03F3/245 , H03F1/0227 , H04B1/0475 , H03F2200/102 , H03F2200/451 , H04B2001/0408
摘要： Systems and methods for pulse shaping voltage transitions in envelope tracking systems are provided. In one aspect, a radio frequency module includes a power amplifier configured to receive a radio frequency input signal and a voltage source. The power amplifier further configured to amplify a radio frequency input signal using the voltage source to generate an output radio frequency signal. The radio frequency module further includes a multi-level switch modulator configured to receive an envelope signal indicative of an envelope of the radio frequency input signal and generate the voltage source based on the envelope signal at one of a plurality of discrete voltage levels. The multi-level switch modulator is further configured to generate the voltage source using an analog component during transitions between discrete voltage levels and a digital component following the transitions.
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公开(公告)号：US20220407572A1
公开(公告)日：2022-12-22
申请号：US17839065
申请日：2022-06-13
摘要： Apparatus and methods for sounding reference signal (SRS) switching are provided. In certain embodiments, a controller internal to the power amplifier module initiates a sequence of instructions, in response to a single command from UE. The instructions cause a reduction in RF signal amplitude at the power amplifier output and then cause the antenna switch to actuate. Thus ensuring a single command transition and preventing over-power on the power amplifier and antenna switch. The teachings herein can be used to facilitate reduction in gap times between transitions on different antennas and avoid the use of a blank symbol before and after each SRS symbol
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公开(公告)号：US20220385237A1
公开(公告)日：2022-12-01
申请号：US17663073
申请日：2022-05-12
摘要： Apparatus and methods for load modulated power amplifiers are provided. In certain embodiments, a load modulated power amplifier system includes a power amplifier that receives a radio frequency signal at an input and provides an amplified radio frequency signal at an output, and a controllable load impedance coupled to the output of the power amplifier. The controllable load impedance receives an envelope signal that changes in relation to an envelope of the radio frequency signal, and the envelope signal is operable to control an impedance of the controllable load impedance to modulate a load at the output of the power amplifier.
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公开(公告)号：US11451199B2
公开(公告)日：2022-09-20
申请号：US16943336
申请日：2020-07-30
发明人： David Steven Ripley , Philip John Lehtola , Peter J. Zampardi, Jr. , Hongxiao Shao , Tin Myint Ko , Matthew Thomas Ozalas
IPC分类号： H03F3/14 , H03F3/213 , H03F3/19 , H03F1/02 , H03F3/21 , H03F3/195 , H01L23/00 , H01L21/768 , H03F3/24 , H01L23/552 , H01L29/36 , H01L29/66 , H01L29/737 , H01L29/812 , H01L29/08 , H01L29/205 , H01L21/8252 , H01L27/06 , H01L23/498 , H01L23/50 , H03F3/60 , H01L23/66 , H01L29/20 , H01L23/48 , H01L21/48 , H01L21/56 , H01L21/78 , H01L21/8249 , H01L21/66 , H01L23/31 , H01L23/522 , H03F3/187 , H03F3/347 , H03F1/56 , H03F3/45 , H01L29/8605 , H01L27/092 , H01L29/06 , H01L29/10
摘要： One aspect of this disclosure is a power amplifier system that includes a control interface, a power amplifier, a passive component, and a bias circuit. The power amplifier and the passive component can be on a first die. The bias circuit can be on a second die. The control interface can operate as a serial interface or as a general purpose input/output interface. The power amplifier can be controllable based at least partly on an output signal from the control interface. The bias circuit can generate a bias signal based at least partly on an indication of the electrical property of the passive component. Other embodiments of the system are provided along with related methods and components thereof.
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公开(公告)号：US20210351765A1
公开(公告)日：2021-11-11
申请号：US17380104
申请日：2021-07-20
发明人： David Steven Ripley
摘要： Systems and methods for a tunable impedance are provided. A tunable impedance includes a transistor assembly having two terminals and a control input. The transistor assembly includes one or more transistors electrically connected between the two terminals to provide a first impedance between the two terminals, based upon a control signal. One or more replica transistors react to the control signal in a similar fashion as the transistor assembly, to provide a replica impedance based upon the control signal. A control circuit is configured to generate the control signal based upon a voltage across the replica transistor(s) and/or a current through the replica transistor(s).
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公开(公告)号：US11137790B2
公开(公告)日：2021-10-05
申请号：US16524810
申请日：2019-07-29
发明人： David Steven Ripley
摘要： Voltage supply system with boost converter and charge pump. A voltage supply system can include a boost converter controllable to receive an input voltage at an input node and generate an output voltage when the output voltage is greater than or equal to the input voltage. The voltage supply system can include a charge pump controllable to receive the input voltage at the input node and generate the output voltage when the output voltage is less than the input voltage. The voltage supply system can further include a controller configured to receive a control signal and control the boost converter or the charge pump to generate the output voltage at an output node based on the control signal.
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公开(公告)号：US20200336122A1
公开(公告)日：2020-10-22
申请号：US16802935
申请日：2020-02-27
发明人： Yu-Jui Lin , Wei Zhang , David Steven Ripley , Vignesh Sridharan
摘要： Envelope tracking power amplifiers with advanced gain shaping are provided. In certain implementations, a power amplifier system includes a power amplifier that amplifies a radio frequency (RF) signal and an envelope tracker that controls a voltage level of a supply voltage of the power amplifier based on an envelope of the RF signal. The power amplifier system further includes a gain shaping circuit that generates a gain shaping current that changes with the voltage level of the supply voltage from the envelope tracker. For example, the gain shaping circuit can include an analog look-up table (LUT) mapping a particular voltage level of the supply voltage to a particular current level of gain shaping current. Additionally, the gain shaping circuit biases the power amplifier based on the gain shaping current.
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