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21. 发明申请

US20120187951A1 POWER AMPLIFIER FOR A MAGNETIC RESONANCE DEVICE 有权
标题翻译：用于磁共振装置的功率放大器
公开(公告)号：US20120187951A1
公开(公告)日：2012-07-26
申请号：US13189315
申请日：2011-07-22
申请人： Adam Albrecht , Horst Kröckel , Markus Vester
发明人： Adam Albrecht , Horst Kröckel , Markus Vester
IPC分类号： G01R33/34 , H03F1/00
CPC分类号： G01R33/3614 , G01R33/34007
摘要： A power amplifier unit for a magnetic resonance device includes at least two power amplifier modules. Symmetrical output signals from the at least two power amplifier modules are fed to a shared balun. The shared balun is provided on a printed circuit board (PCB) and is realized in a unit with the at least two power amplifier modules. The balun is configured to asymmetrize a sum signal.
摘要翻译：用于磁共振装置的功率放大器单元包括至少两个功率放大器模块。来自至少两个功率放大器模块的对称输出信号被馈送到共享平衡 - 不平衡变压器。共享平衡 - 不平衡变压器设置在印刷电路板（PCB）上，并且与至少两个功率放大器模块一起实现。平衡 - 不平衡变换器被配置为使和信号不对称。

22. 发明申请

US20120154042A1 ANALOG MULTIPLIER 失效
标题翻译：模拟乘法器
公开(公告)号：US20120154042A1
公开(公告)日：2012-06-21
申请号：US13047361
申请日：2011-03-14
申请人： Praveen Varma Nadimpalli , Joseph Hubert Colles
发明人： Praveen Varma Nadimpalli , Joseph Hubert Colles
IPC分类号： H03F1/00 , G06G7/16
CPC分类号： G06G7/16
摘要： An exemplary embodiment of an analog multiplier may include a voltage controlled resistance circuit, a first transistor and a second transistor, where the resistance of the voltage controlled resistance circuit is based upon a difference between a supply voltage and a first input voltage and a constant current supply. The current passing through the voltage controlled resistance circuit is based upon a difference between the voltage supply and a second input voltage. The first transistor may be configured to mirror the current passing through the voltage controlled resistance circuit.
摘要翻译：模拟乘法器的示例性实施例可以包括电压控制电阻电路，第一晶体管和第二晶体管，其中电压控制电阻电路的电阻基于电源电压和第一输入电压与恒定电流之间的差供应。通过压控电阻电路的电流是基于电源和第二输入电压之间的差。第一晶体管可以被配置为镜像通过压控电阻电路的电流。

23. 发明申请

US20120139627A1 METHOD FOR USING AN AMPLIFIER 审中-公开
标题翻译：使用放大器的方法
公开(公告)号：US20120139627A1
公开(公告)日：2012-06-07
申请号：US13127754
申请日：2011-04-23
申请人： Mats Carlsson
发明人： Mats Carlsson
IPC分类号： H03F1/00
CPC分类号： H03F3/19 , H03F1/34
摘要： An amplifier is provided that has a first loop interacting with a second loop. A feedback signal and input signal are provided to the amplifier. The first loop and the second loop interact with the input signal to nullify the feedback signal.
摘要翻译：提供了具有与第二回路相互作用的第一回路的放大器。反馈信号和输入信号被提供给放大器。第一回路和第二回路与输入信号相互作用以使反馈信号无效。

24. 发明授权

US08169261B2 High efficiency amplification 有权
标题翻译：高效放大
公开(公告)号：US08169261B2
公开(公告)日：2012-05-01
申请号：US12360727
申请日：2009-01-27
申请人： Martin Paul Wilson
发明人： Martin Paul Wilson
IPC分类号： H03F1/00
CPC分类号： H03F1/0222 , H03F1/00 , H03F1/02 , H03F1/025 , H03F3/189 , H03F3/19 , H03F3/21 , H03F3/245 , H03F2200/102 , H03F2200/331 , H03F2200/451 , H03F2200/504 , H03F2200/511
摘要： A radio frequency amplification stage comprising: an amplifier for receiving an input signal to be amplified and a power supply voltage; and a power supply voltage stage for supplying said power supply voltage, comprising: means for providing a reference signal representing the envelope of the input signal; means for selecting one of a plurality of supply voltage levels in dependence on the reference signal; and means for generating an adjusted selected power supply voltage, comprising an ac amplifier for amplifying a difference between the reference signal and one of the selected supply voltage level or the adjusted selected supply voltage level, and a summer for summing the amplified difference with the selected supply voltage to thereby generate the adjusted supply voltage.
摘要翻译：一种射频放大级，包括：放大器，用于接收待放大的输入信号和电源电压; 以及用于提供所述电源电压的电源电压级，包括：用于提供表示所述输入信号的包络的参考信号的装置; 用于根据参考信号选择多个电源电压电平中的一个的装置; 以及用于产生经调整的所选择的电源电压的装置，包括用于放大参考信号与所选择的电源电压电平或所调整的所选电源电压电平之一之间的差的交流放大器，以及用于将放大的差与所选择的电源电压相加的加法器供给电压，从而生成调整后的电源电压。

25. 发明申请

US20120049951A1 HIGH SPEED SWITCHED CAPACITOR REFERENCE BUFFER 审中-公开
标题翻译：高速开关电容参考缓冲器
公开(公告)号：US20120049951A1
公开(公告)日：2012-03-01
申请号：US12901877
申请日：2010-10-11
申请人： Jagannathan Venkataraman , Visvesvaraya A. Pentakota , Ganesh Kiran
发明人： Jagannathan Venkataraman , Visvesvaraya A. Pentakota , Ganesh Kiran
IPC分类号： H03F1/00
CPC分类号： H03F3/505 , G11C27/026 , H03F2203/5018
摘要： Conventional single-ended and differential reference buffers used for switched capacitor loads (such as sample-and-hold circuits for analog-to-digital converters) often have errors due to “memory” and are current source limited. Here, however, single-ended and differential reference buffers are provided, which include low bandwidth switched capacitor feedback loops to limit noise from the feedback loop and decouple internal bias nodes to avoid memory issues. Additionally, the differential reference buffers shown include flipped voltage followers that can sink/source large currents, which are not current source limited, and that can be underdamped so as to obtain a two pole settling response to reduce power consumption.
摘要翻译：用于开关电容器负载的传统单端和差分参考缓冲器（例如模数转换器的采样和保持电路）通常由于“存储器”而导致错误，并且电流源受限。然而，这里提供了单端和差分参考缓冲器，其包括低带宽开关电容器反馈回路，以限制来自反馈回路的噪声并且去耦内部偏置节点以避免存储器问题。此外，所示的差分参考缓冲器包括可以吸收/源极大电流的翻转电压跟随器，其不是电流源限制的，并且可以被阻尼，以获得两极稳定响应以降低功耗。

26. 发明授权

US08116700B2 Reducing common mode effects in an output stage 有权
标题翻译：在输出阶段降低共模效应
公开(公告)号：US08116700B2
公开(公告)日：2012-02-14
申请号：US12619062
申请日：2009-11-16
申请人： Eric Kimball
发明人： Eric Kimball
IPC分类号： H04B1/02 , H03F3/68 , H03F1/00
CPC分类号： H03F3/195 , H03F1/565 , H03F3/211 , H03F3/24 , H03F2200/387 , H03F2200/451 , H03F2200/541 , H03F2203/21139 , H04B1/0458
摘要： In one embodiment, a power amplifier may include an output stage with multiple transformers and corresponding matching capacitances. The capacitances may include a first matching capacitance coupled in parallel with a secondary coil of a first transformer and a second matching capacitance coupled in parallel with a secondary coil of a second transformer, where the secondary coils are coupled in series in an output stack configuration. By accounting for parasitics present in the power amplifier, the first matching capacitance can be designed to have a greater capacitance than the second matching capacitor, even where the first and second transformers are configured to output substantially equal power levels.
摘要翻译：在一个实施例中，功率放大器可以包括具有多个变压器的输出级和相应的匹配电容。电容可以包括与第一变压器的次级线圈并联耦合的第一匹配电容和与第二变压器的次级线圈并联耦合的第二匹配电容，其中次级线圈以输出堆叠配置串联耦合。通过考虑存在于功率放大器中的寄生效应，即使第一和第二变压器被配置为输出基本相等的功率电平，第一匹配电容可被设计成具有比第二匹配电容器更大的电容。

27. 发明申请

US20120019317A1 Self-Oscillating Driver Circuit 有权
标题翻译：自振驱动电路
公开(公告)号：US20120019317A1
公开(公告)日：2012-01-26
申请号：US13267476
申请日：2011-10-06
申请人： Dario Giotta , Thomas Poctscher , David San Segundo Bello , Andreas Wiesbauer
发明人： Dario Giotta , Thomas Poctscher , David San Segundo Bello , Andreas Wiesbauer
IPC分类号： H03F1/00
CPC分类号： H03F3/45475 , H03F2203/45644
摘要： A self-oscillating driver circuit includes a driver stage, a feedforward path which is coupled to an input of the driver stage, and a feedback path which couples an output of the driver stage to an input of the feedforward path. The feedforward path includes a feedforward filter which is designed as an active filter. In order to prevent an oscillatory state of the driver circuit at an unwanted frequency, it is proposed that an internal state variable of the feedforward filter be monitored and that the feedforward filter be reset if the value of the monitored internal state variable is outside a predefined range.
摘要翻译：自振荡驱动器电路包括驱动器级，耦合到驱动器级的输入的前馈路径以及将驱动级的输出耦合到前馈路径的输入的反馈路径。前馈路径包括被设计为有源滤波器的前馈滤波器。为了防止驱动电路的振荡状态处于不期望的频率，建议监视前馈滤波器的内部状态变量，并且如果所监视的内部状态变量的值在预定义的值之外，则前馈滤波器被复位范围。

28. 发明申请

US20120007673A1 AMPLIFIER WITH WIDE GAIN RANGE 有权
标题翻译：具有宽增益范围的放大器
公开(公告)号：US20120007673A1
公开(公告)日：2012-01-12
申请号：US12857525
申请日：2010-08-16
申请人： Ying-Chung Chiu
发明人： Ying-Chung Chiu
IPC分类号： H03F1/00
CPC分类号： H03F1/0277 , H03F1/26 , H03F3/189 , H03F3/72 , H03F2200/249 , H03F2200/294 , H03F2200/405 , H03F2200/417 , H03F2200/78 , H03F2203/7236 , H03G1/0088
摘要： An amplifier with wide gain range includes a signal converting unit, a channel unit, and multiple amplifiers. The signal converting unit receives a gain modulation signal and accordingly outputs multiple modulation signals and multiple selection signals. Based on a level of the gain modulation signal, one of the selection signals is set at a first logic state and the other selection signals are at a second logic state. The channel unit has multiple channels, respectively controlled by the selection signals, so as to conduct the channel with at the first logic state. The amplifiers are connected in series. Output terminals of the amplifiers are also respectively output to the channels of the channel unit. The amplifiers are also controlled by the modulation signals of the signal converting unit.
摘要翻译：具有宽增益范围的放大器包括信号转换单元，通道单元和多个放大器。信号转换单元接收增益调制信号，并相应地输出多个调制信号和多个选择信号。基于增益调制信号的电平，选择信号中的一个被设置在第一逻辑状态，而其他选择信号处于第二逻辑状态。信道单元具有分别由选择信号控制的多个信道，以便以第一逻辑状态进行信道。放大器串联。放大器的输出端也分别输出到通道单元的通道。放大器也由信号转换单元的调制信号控制。

29. 发明申请

US20110316625A1 MIXED-SIGNAL TRANSMISSION CIRCUIT FOR SWITCHING POWER AMPLIFIERS 有权
标题翻译：用于切换功率放大器的混合信号传输电路
公开(公告)号：US20110316625A1
公开(公告)日：2011-12-29
申请号：US12998946
申请日：2009-12-04
申请人： Johann Christoph Scheytt
发明人： Johann Christoph Scheytt
IPC分类号： H03F1/00
CPC分类号： H03F3/245 , H03F1/32 , H03F3/19 , H03F3/217 , H03F2200/351 , H04L25/4902 , H04L27/361
摘要： The invention relates to an upstream unit (1) for a switched power amplifier (2) for a high-frequency transmission circuit (16). The upstream unit (1) supplies a pulse-length modulated HF pulse signal (22) to the switched power amplifier (2), wherein the linearity of the pulse length modulation and of the high-frequency transmission circuit is improved. The upstream unit (1) according to the invention has a first signal input (3) for a high-frequency, phase-modulated first input signal (18), a second signal input (4) for a second input signal (19) having a low frequency in comparison with the first input signal, a controllable first delay unit (5), a controllable second delay unit (7), a pulse generator (9) and a control unit (10).
摘要翻译：本发明涉及一种用于高频传输电路（16）的开关式功率放大器（2）的上游单元（1）。上游单元（1）向切换的功率放大器（2）提供脉冲长度调制的HF脉冲信号（22），其中提高了脉冲长度调制的线性度和高频率传输电路的线性。根据本发明的上游单元（1）具有用于高频，相位调制的第一输入信号（18）的第一信号输入（3），用于第二输入信号（19）的第二信号输入（4），其具有与第一输入信号相比，低频，可控第一延迟单元（5），可控第二延迟单元（7），脉冲发生器（9）和控制单元（10）。

30. 发明授权

US08063513B2 Power source and method for controlling operational power 有权
标题翻译：用于控制运行功率的电源和方法
公开(公告)号：US08063513B2
公开(公告)日：2011-11-22
申请号：US11631073
申请日：2005-06-28
申请人： Eero Koukkari , Pasi Kurttio
发明人： Eero Koukkari , Pasi Kurttio
IPC分类号： H02J3/00 , H03F1/00
CPC分类号： H03F1/0227 , H03F1/0272 , H03F3/24 , H03F2200/228 , H03F2200/393 , H03F2200/471 , H03F2200/504 , H03F2200/555 , H03F2200/78 , Y10T307/593 , Y10T307/658
摘要： The solution controls electric operational power to be fed to an amplifier. The control can be carried out, for instance, in accordance with a predetermined signal. The operational power is fed to the amplifier with a voltage source unit and a current source unit, and the operational voltage that the voltage source unit feeds to the amplifier is controlled. The current source unit feeds at least some of the operational electric current of the amplifier.
摘要翻译：该解决方案控制供电到放大器的电动功率。控制可以例如根据预定信号进行。操作功率用电压源单元和电流源单元馈送到放大器，并且电压源单元馈送到放大器的工作电压被控制。电流源单元馈送放大器的至少一些工作电流。

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