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公开(公告)号：US20140340156A1
公开(公告)日：2014-11-20
申请号：US14082301
申请日：2013-11-18
发明人： Kenta KURODA
IPC分类号： H03F1/26
CPC分类号： H03F1/26 , H03F1/02 , H03F1/32 , H03F1/56 , H03F3/189 , H03F3/245 , H03F2200/192 , H03F2200/195 , H03F2200/204 , H03F2200/207 , H03F2200/228 , H03F2200/393
摘要： An amplifier comprises a power amplifier for amplifying an unmodulated high-frequency input signal, a first branching device which is provided at an input terminal side of the power amplifier and extracts a signal, a second branching device which is provided at an output terminal side of the power amplifier and extracts a signal, a mixer for mixing a signal from the first branching device and a signal from the second branching device, a low-pass filter for removing a frequency band component of the input signal from an output signal of the mixer, a high-pass filter for removing a DC component from an output signal of the low-pass filter, and a wave detector for extracting a signal.
摘要翻译： 放大器包括用于放大未调制的高频输入信号的功率放大器，设置在功率放大器的输入端侧并提取信号的第一分支装置，设置在功率放大器的输出端侧的第二分支装置 功率放大器并提取信号，用于混合来自第一分支装置的信号的混合器和来自第二分支装置的信号的低通滤波器，用于从混频器的输出信号中去除输入信号的频带分量的低通滤波器 ，用于从低通滤波器的输出信号中去除DC分量的高通滤波器，以及用于提取信号的波检测器。
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公开(公告)号：US20130033317A1
公开(公告)日：2013-02-07
申请号：US13197691
申请日：2011-08-03
IPC分类号： H03F1/26
CPC分类号： H03F1/3247 , H03F1/3294 , H03F2200/192 , H03F2200/195 , H03F2200/204 , H03F2200/207 , H03F2200/228
摘要： An apparatus and a method select and use parameter values for an RF power amplifier linearizer to pre-distort the input signals of a power amplifier, so as to achieve a linear output response in the power amplifier. The apparatus and the method select from a number sets of parameter values, each set of parameter values corresponding to a different output power range of the power amplifier. The set of parameters include a coefficient vector tailored for the particular output power range for that set. The power amplifier input power is repeatedly measured and filtered at various time intervals. The input power measurements may be filtered by a fast attack/slow decay filter, which follows the peaks of the measurements under operation of the fast attack portion of the filter and provides a low variance during operation of the slow decay portion of the filter. The coefficient values for the predistortion linearization of the power amplifier is adapted dynamically, in response to changes in the input power level of the power amplifier. In one embodiment, hysteresis is used to reduce the rate at which the predistortion linearizer hops between two sets of the parameter values. Using the apparatus and the method, good ACLR across a wide range of power amplifier output power is achieved. Such characteristics are particularly advantageous in a system in which waveforms having fast power transients are present.
摘要翻译： 一种装置和方法选择并使用RF功率放大器线性化器的参数值来预失真功率放大器的输入信号，从而在功率放大器中实现线性输出响应。 该装置和方法从多组参数值中选择每组与功率放大器的不同输出功率范围对应的参数值。 该组参数包括针对该组的特定输出功率范围量身定制的系数向量。 功率放大器输入功率以不同的时间间隔重复测量和滤波。 输入功率测量可以通过快速攻击/慢衰减滤波器来滤波，该滤波器跟随滤波器的快速攻击部分操作的测量的峰值，并且在滤波器的缓慢衰减部分的操作期间提供低的方差。 响应于功率放大器的输入功率电平的变化，功率放大器的预失真线性化的系数值被动态地适配。 在一个实施例中，使用滞后来降低预失真线性化器在两组参数值之间跳跃的速率。 使用该装置和方法，实现了广泛的功率放大器输出功率的良好的ACLR。 在存在具有快速功率瞬变的波形的系统中，这种特性是特别有利的。
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公开(公告)号：US20100007415A1
公开(公告)日：2010-01-14
申请号：US11721709
申请日：2004-12-21
申请人： Hongtao Ru
发明人： Hongtao Ru
IPC分类号： H03F1/26
CPC分类号： H04W52/14 , H03F1/34 , H03F3/24 , H03F2200/195 , H03F2200/207 , H04B17/13 , H04B2001/0433 , H04W52/143 , H04W52/146
摘要： The present invention relates to a method for detecting signal nonlinear distortion magnitude, used for extracting and detecting the nonlinear distortion output by a radio frequency power amplifier, characterized in respectively extracting input signal and output signal, and performing square after matching the amplitudes and frequencies of the input signal and output signal respectively, obtaining respective low frequency components of the squared input signal and output signal, therefore, the carrier component of the signals can be filtered, and the low frequency components can characterize the distorted signal feature as well as facilitate handling. The present invention performs square after matching the input signal and output signal, extracts the low frequency component, and then the relativity with the frequency and bandwidth of the signal is low, therefore, the difficulty in detecting the distortion can be reduced greatly. In addition, the square is equivalent to amplify the distortion, which is favorable to improve the detection sensitivity of output distortion.
摘要翻译： 本发明涉及一种用于检测信号非线性失真幅度的方法，用于提取和检测由射频功率放大器输出的非线性失真，其特征在于分别提取输入信号和输出信号，并在匹配幅度和频率之后进行平方 输入信号和输出信号，获得平方输入信号和输出信号的各自的低频分量，因此信号的载波分量可以被滤波，低频分量可以表征失真的信号特征以及便于处理 。 本发明在匹配输入信号和输出信号之后进行平方，提取低频分量，然后与信号的频率和带宽相关性低，因此可以大大降低检测失真的难度。 另外，平方相当于放大失真，有利于提高输出失真的检测灵敏度。
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公开(公告)号：US20090261908A1
公开(公告)日：2009-10-22
申请号：US12473443
申请日：2009-05-28
申请人： Piotr Markowski
发明人： Piotr Markowski
IPC分类号： H03F3/04
CPC分类号： H03F1/0227 , H03F1/0205 , H03F1/0238 , H03F1/32 , H03F3/2178 , H03F2200/102 , H03F2200/195 , H03F2200/207 , H03F2200/351 , H03F2200/451 , H03F2200/504
摘要： A power supply for providing a modulated output voltage to a load is disclosed. According to various embodiments, the power supply comprises a plurality of parallel-connected switch-mode power modules and a controller. The controller is connected to each of the power modules and is for controlling the duty cycles of the respective power modules such that the power modules have a common duty cycle in steady state, but in a phase-shifted or “interleaved” manner. In addition, the controller is for controlling the output voltage of the power converter by controlling the ratio of power modules in the forward state at a time to the total number of power modules. In this way, by providing a sufficiently large number of power modules, arbitrarily low output voltage amplitudes and intra-level oscillations can be achieved. Further, the rate of modulation of the output voltage can exceed the switching frequency (f=1/T, where T is the switching period) of the power modules. An rf power amplifier system including such a power supply is also disclosed.
摘要翻译： 公开了一种用于向负载提供调制输出电压的电源。 根据各种实施例，电源包括多个并联的开关模式电源模块和控制器。 控制器连接到每个功率模块，并且用于控制各个功率模块的占空比，使得功率模块在稳定状态下具有公共占空比，而是以相移或“交错”的方式。 此外，控制器用于通过控制功率模块在一次的正向状态下与功率模块总数的比率来控制功率转换器的输出电压。 以这种方式，通过提供足够大数量的功率模块，可以实现任意低的输出电压幅度和级内振荡。 此外，输出电压的调制率可以超过功率模块的开关频率（f = 1 / T，其中T是开关周期）。 还公开了包括这种电源的射频功率放大器系统。
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公开(公告)号：US07602155B2
公开(公告)日：2009-10-13
申请号：US11190642
申请日：2005-07-27
申请人： Piotr Markowski
发明人： Piotr Markowski
CPC分类号： H03F1/0227 , H03F1/0205 , H03F1/0238 , H03F1/32 , H03F3/2178 , H03F2200/102 , H03F2200/195 , H03F2200/207 , H03F2200/351 , H03F2200/451 , H03F2200/504
摘要： A power supply for providing a modulated output voltage to a load is disclosed. According to various embodiments, the power supply comprises a plurality of parallel-connected switch-mode power modules and a controller. The controller is connected to each of the power modules and is for controlling the duty cycles of the respective power modules such that the power modules have a common duty cycle in steady state, but in a phase-shifted or “interleaved” manner. In addition, the controller is for controlling the output voltage of the power converter by controlling the ratio of power modules in the forward state at a time to the total number of power modules. In this way, by providing a sufficiently large number of power modules, arbitrarily low output voltage amplitudes and intra-level oscillations can be achieved. Further, the rate of modulation of the output voltage can exceed the switching frequency (f=1/T, where T is the switching period) of the power modules. An rf power amplifier system including such a power supply is also disclosed.
摘要翻译： 公开了一种用于向负载提供调制输出电压的电源。 根据各种实施例，电源包括多个并联的开关模式电源模块和控制器。 控制器连接到每个功率模块，并且用于控制各个功率模块的占空比，使得功率模块在稳定状态下具有公共占空比，而是以相移或“交错”的方式。 此外，控制器用于通过控制功率模块在一次的正向状态下与功率模块总数的比率来控制功率转换器的输出电压。 以这种方式，通过提供足够大数量的功率模块，可以实现任意低的输出电压幅度和级内振荡。 此外，输出电压的调制率可以超过功率模块的开关频率（f = 1 / T，其中T是开关周期）。 还公开了包括这种电源的射频功率放大器系统。
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公开(公告)号：US20070259630A1
公开(公告)日：2007-11-08
申请号：US11744291
申请日：2007-05-04
申请人： Klaus Huber , Ralph Oppelt
发明人： Klaus Huber , Ralph Oppelt
CPC分类号： H03G3/3036 , G01R33/3621 , H03F1/3247 , H03F1/3282 , H03F1/3294 , H03F2200/195 , H03F2200/207 , H03F2200/336 , H03F2200/451 , H03G1/04
摘要： A controller for an RF amplifier, in particular for a RF amplifier of an MR tomography apparatus, has an IQ control element for adjusting the magnitude and phase an RF signal that is be fed to the RF amplifier. The IQ control element has a signal splitter that splits the RF signal into two partial signals having a 90° phase offset in an I path and a Q path, each having a multiplier for multiplying the partial signal by an I factor in the I path and a Q factor in the Q path. A summing unit recombines the partial signals. A detector determines the actual phase difference and actual amplification between the RF signal fed to the IQ control element and the RF signal amplified by the RF amplifier. An IQ controller determines the I factor and the Q factor from the actual difference and a desired phase difference and the actual amplifier and a desired amplification. The IQ controller has an operating point at which the I factor and the Q factor are the same magnitude if the actual and desired phase differences and the actual and desired amplifications are the same.
摘要翻译： 用于RF放大器的控制器，特别是用于MR断层摄影装置的RF放大器的控制器具有用于调整幅度和相位的IQ控制元件，RF信号被馈送到RF放大器。 IQ控制元件具有信号分离器，其将RF信号分解成在I路径和Q路径中具有90°相位偏移的两个部分信号，每个具有用于将该部分信号乘以I路径中的I因子的乘法器和Q路径， Q路径中的Q因子。 求和单元重新组合部分信号。 检测器确定馈送到IQ控制元件的RF信号与由RF放大器放大的RF信号之间的实际相位差和实际放大。 IQ控制器根据实际差异和所需的相位差以及实际的放大器和所需的放大率来确定I因子和Q因子。 如果实际和所需的相位差以及实际和所需的放大倍数相同，则IQ控制器具有I因子和Q因子的幅度相同的工作点。
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公开(公告)号：US20030155978A1
公开(公告)日：2003-08-21
申请号：US10080225
申请日：2002-02-21
发明人： David R. Pehlke
IPC分类号： H03F003/04
CPC分类号： H03F1/0272 , H03F1/025 , H03F1/301 , H03F2200/108 , H03F2200/195 , H03F2200/451 , H03F2200/462 , H03F2200/481 , H03F2200/483 , H03F2200/504
摘要： A bias controller sets the quiescent current of a power amplifier to a desired value by dynamically adjusting the power amplifier bias voltage. Using closed-loop control, the bias controller sets the bias voltage to whatever value is needed despite circuit component variations and temperature effects. Operation of the bias controller complements dynamic bias voltage adjustment in advance of transmit operations, such as in advance of a transmit burst. In a first state, where the power amplifier is in a quiescent condition, the bias controller adjusts bias voltage to set the desired quiescent current by detecting the supply current into the power amplifier. The bias controller then transitions to a second state, where it maintains the adjusted bias voltage irrespective of amplifier supply current. Despite its ability to sense supply current into the power amplifier, the bias controller's configurations avoid dissipative current sensing during normal operation of the power amplifier.
摘要翻译： 偏置控制器通过动态调整功率放大器偏置电压将功率放大器的静态电流设置为所需的值。 使用闭环控制，偏置控制器将偏置电压设置为尽管电路元件变化和温度影响所需的任何值。 偏置控制器的操作在发送操作之前补充动态偏置电压调整，例如在发送突发之前。 在功率放大器处于静态状态的第一状态中，偏置控制器通过检测进入功率放大器的供电电流来调节偏置电压以设置所需的静态电流。 然后，偏置控制器转变到第二状态，其中它保持调节的偏置电压，而与放大器电源电流无关。 尽管它能够感测到功率放大器的电源电流，但是偏置控制器的配置避免了功率放大器正常工作期间的耗散电流检测。
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公开(公告)号：US09379675B2
公开(公告)日：2016-06-28
申请号：US14282484
申请日：2014-05-20
CPC分类号： H03F1/52 , H03F1/0222 , H03F1/0266 , H03F3/195 , H03F3/24 , H03F3/72 , H03F2200/102 , H03F2200/18 , H03F2200/192 , H03F2200/195 , H03F2200/426 , H03F2200/435 , H03F2200/451 , H03F2203/7215 , H03F2203/7221
摘要： Aspects of this disclosure relate to protecting a circuit, such as an amplifier, from transient overdrive events and/or average overdrive events. In one embodiment, an indication of average power, such as root mean squared (RMS) power of a radio frequency (RF) signal, can be compared to a first threshold and an indication of a peak RF power can be compared to a second threshold. When the indication of average power exceeds the first threshold, an average overdrive event can be detected. When the indication of peak power exceeds the second threshold, a peak overdrive event can be detected. If either a transient overdrive event or an average overdrive event is detected, a circuit, such as an amplifier, can be protected.
摘要翻译： 本公开的方面涉及保护诸如放大器的电路免受瞬态过驱动事件和/或平均过驱动事件的影响。 在一个实施例中，能够将射频（RF）信号的平均功率（诸如均方根（RMS））功率的指示与第一阈值进行比较，并且峰值RF功率的指示可以与第二阈值进行比较 。 当平均功率的指示超过第一阈值时，可以检测平均过驱动事件。 当峰值功率的指示超过第二阈值时，可以检测峰值过驱动事件。 如果检测到瞬态过驱动事件或平均过驱动事件，则可以保护诸如放大器的电路。
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公开(公告)号：US20150236658A1
公开(公告)日：2015-08-20
申请号：US14282484
申请日：2014-05-20
CPC分类号： H03F1/52 , H03F1/0222 , H03F1/0266 , H03F3/195 , H03F3/24 , H03F3/72 , H03F2200/102 , H03F2200/18 , H03F2200/192 , H03F2200/195 , H03F2200/426 , H03F2200/435 , H03F2200/451 , H03F2203/7215 , H03F2203/7221
摘要： Aspects of this disclosure relate to protecting a circuit, such as an amplifier, from transient overdrive events and/or average overdrive events. In one embodiment, an indication of average power, such as root mean squared (RMS) power of a radio frequency (RF) signal, can be compared to a first threshold and an indication of a peak RF power can be compared to a second threshold. When the indication of average power exceeds the first threshold, an average overdrive event can be detected. When the indication of peak power exceeds the second threshold, a peak overdrive event can be detected. If either a transient overdrive event or an average overdrive event is detected, a circuit, such as an amplifier, can be protected.
摘要翻译： 本公开的方面涉及保护诸如放大器的电路免受瞬态过驱动事件和/或平均过驱动事件的影响。 在一个实施例中，能够将射频（RF）信号的平均功率（诸如均方根（RMS））功率的指示与第一阈值进行比较，并且峰值RF功率的指示可以与第二阈值进行比较 。 当平均功率的指示超过第一阈值时，可以检测平均过驱动事件。 当峰值功率的指示超过第二阈值时，可以检测峰值过驱动事件。 如果检测到瞬态过驱动事件或平均过驱动事件，则可以保护诸如放大器的电路。
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10.发明授权公开(公告)号：US08280323B2
公开(公告)日：2012-10-02
申请号：US11973951
申请日：2007-10-11
申请人： Rick L. Thompson
发明人： Rick L. Thompson
CPC分类号： H04B1/0458 , H03F1/02 , H03F1/0205 , H03F1/56 , H03F3/24 , H03F2200/195 , H03F2200/207 , H03F2200/321 , H03F2200/451 , H03H7/40
摘要： Fuzzy logic is utilized to control an RF amplifier and associated tuner for continuous self-optimization and automatic load matching to at least double the battery life of a battery-powered transmitter.
摘要翻译： 模糊逻辑用于控制RF放大器和相关联的调谐器，用于连续自优化和自动负载匹配，至少使电池供电的发射器的电池寿命的两倍。
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