公开(公告)号：US20130241556A1

公开(公告)日：2013-09-19

申请号：US13605928

申请日：2012-09-06

申请人： Jan Bollenbeck ,  Klaus Porzelt ,  Wilfried Schnell

发明人： Jan Bollenbeck ,  Klaus Porzelt ,  Wilfried Schnell

IPC分类号： G01R33/36

CPC分类号： G01R33/3664 ,  G01R33/3415 ,  G01R33/3657

摘要： A detuning apparatus for a receive coil for a magnetic resonance device includes a number of coil elements. The coil elements may be selectively connected to a receive channel of a data processing apparatus by way of a switching apparatus. Each of the coil elements includes at least one detuning assembly such as, for example, a PIN diode that may be switched between a detuning state and a receive state by way of a continuous switching signal. A controller is provided to switch the switching apparatus and to generate the switching signals. The detuning apparatus has first diplexers connected upstream of the switching apparatus for injecting switching signals for switching the detuning assembly for coil elements to be detuned dynamically. The detuning apparatus also includes detuning modules for each of the coil elements to switch the detuning assembly to the detuning state if there is no switching signal present.

摘要翻译： 用于磁共振装置的接收线圈的失谐装置包括多个线圈元件。 线圈元件可以通过开关装置选择性地连接到数据处理装置的接收通道。 每个线圈元件包括至少一个失谐组件，例如PIN二极管，其可以通过连续切换信号在失谐状态和接收状态之间切换。 提供控制器来切换开关装置并产生开关信号。 失调装置具有连接在开关装置上游的第一双工器，用于注入开关信号，用于切换用于线圈元件的失谐组件以便动态失谐。 失调装置还包括用于每个线圈元件的失谐模块，以便在不存在切换信号的情况下将失谐组件切换到失谐状态。

公开(公告)号：US20120020259A1

公开(公告)日：2012-01-26

申请号：US13183065

申请日：2011-07-14

申请人： Jan Bollenbeck ,  Ralph Oppelt

发明人： Jan Bollenbeck ,  Ralph Oppelt

IPC分类号： H04J1/00 ,  H04L5/00

CPC分类号： G01R33/3621 ,  A61B5/055

摘要： A preprocessing circuit for receive signals of a local coil in a magnetic resonance facility (1) includes an arrangement for supplying at least one auxiliary frequency signal of an auxiliary frequency. For at least one or the auxiliary frequency signal, a frequency multiplier generates the auxiliary frequency signal from an intermediate signal transmitted from a receive system of the magnetic resonance facility by way of a transmission link. The multiplier generates the auxiliary frequency signal with a frequency corresponding to a whole-number fraction of the auxiliary frequency.

摘要翻译： 用于在磁共振设备（1）中本地线圈的接收信号的预处理电路包括用于提供辅助频率的至少一个辅助频率信号的装置。 对于至少一个或辅助频率信号，倍频器通过传输链路从由磁共振设备的接收系统发送的中间信号产生辅助频率信号。 乘法器产生具有对应于辅助频率的全分数的频率的辅助频率信号。

公开(公告)号：US06549068B1

公开(公告)日：2003-04-15

申请号：US10049017

申请日：2002-05-16

申请人： Jan Bollenbeck

发明人： Jan Bollenbeck

IPC分类号： H03G320

CPC分类号： H03G3/3042 ,  H03G3/3036

摘要： Method for operating an RF power amplifier (100; 200) with an approximately linear characteristic by adjusting at least one operating parameter of the amplifier or at least one active component of this amplifier, wherein a minimum collector or drain current of the active component or, respectively, an amplifier stage and the input signal level of the RF power amplifier are controlled in dependence on the quotient of harmonic power and useful-signal power of the amplifier output signal.

摘要翻译： 用于通过调节放大器的至少一个操作参数或该放大器的至少一个有源分量来操作具有近似线性特性的RF功率放大器（100; 200）的方法，其中所述有源部件的最小集电极或漏极电流， 分别根据放大器输出信号的谐波功率和有用信号功率的商来控制放大器级和RF功率放大器的输入信号电平。