公开(公告)号：US07890070B2

公开(公告)日：2011-02-15

申请号：US11937552

申请日：2007-11-09

Applicant: Jan Bollenbeck ,  Ralph Oppelt

Inventor： Jan Bollenbeck ,  Ralph Oppelt

IPC: H04B1/18 ,  H04B7/00

CPC classification number: H03J3/185 ,  H03H11/1291

Abstract: A filter circuit arrangement for filtering of a radio-frequency signal has a first tunable filter and a phase regulation loop in order to hold the first tunable filter to a transmission phase constant relative to the frequency of the radio-frequency signal. The filter circuit arrangement has a second tunable filter arranged parallel to the first tunable filter in the phase regulation loop. The first tunable filter and the second tunable filter exhibit different attenuation characteristics and are fashioned and connected within the phase regulation loop so that: a capture range of the filter circuit arrangement, in which a tuning of the phase regulation loop to a radio-frequency signal to be filtered is possible is dominated by the attenuation characteristic of the second tunable filter, and so that the transmission behavior of the filter circuit arrangement in operation is dominated by the attenuation characteristic of the first tunable filter, given a tuned phase regulation loop. A circuit arrangement for generation of a local oscillator signal has an oscillation generator and a filter circuit arrangement as described above arranged downstream of the oscillation generator.

Abstract translation: 用于对射频信号进行滤波的滤波器电路装置具有第一可调滤波器和相位调节环路，以便将第一可调滤波器保持在相对于射频信号的频率的传输相位恒定。 滤波器电路装置具有在相位调节环路中平行于第一可调谐滤波器布置的第二可调谐滤波器。 第一可调谐滤波器和第二可调谐滤波器具有不同的衰减特性，并且在相位调节环路内形成和连接，使得：滤波器电路装置的捕获范围，其中相调节环路调谐到射频信号 要被滤波的是可能的，由第二可调谐滤波器的衰减特性所支配，并且使得在给定调谐相位调节环路的情况下，在操作中的滤波器电路装置的传输行为由第一可调谐滤波器的衰减特性支配。 用于产生本地振荡器信号的电路装置具有布置在振荡发生器下游的振荡发生器和如上所述的滤波器电路装置。

公开(公告)号：US07761060B2

公开(公告)日：2010-07-20

申请号：US11250824

申请日：2005-10-14

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H04B1/00 ,  H04B7/00

CPC classification number: H04B1/66 ,  G01R33/3621 ,  G01R33/3692

Abstract: In a method and apparatus for transmission of signals, an input signal is supplied to at least one dynamic compressor and the dynamics of the signal is compressed by the dynamic compressor with a degree of compression. The compressed signal is subsequently adapted, in particular limited, in terms of its frequency bandwidth dependent on the degree of compression, such as directly dependent on the degree of compression or dependent on a reference value directly associated with the degree of compression, such as the input level of the signal before the dynamic compressor.

Abstract translation: 在用于传输信号的方法和装置中，输入信号被提供给至少一个动态压缩器，并且动态压缩器以一定程度的压缩将信号的动力学压缩。 压缩信号随后适应，特别是根据其频率带宽取决于压缩程度，例如直接取决于压缩程度或依赖于与压缩程度直接相关的参考值，例如 动态压缩机前的信号输入电平。

公开(公告)号：US20080136473A1

公开(公告)日：2008-06-12

申请号：US11937552

申请日：2007-11-09

Applicant: Jan Bollenbeck ,  Ralph Oppelt

Inventor： Jan Bollenbeck ,  Ralph Oppelt

IPC: H03L7/081 ,  H03K5/00 ,  H03L7/08 ,  H03L7/06

CPC classification number: H03J3/185 ,  H03H11/1291

Abstract: A filter circuit arrangement for filtering of a radio-frequency signal has a first tunable filter and a phase regulation loop in order to hold the first tunable filter to a transmission phase constant relative to the frequency of the radio-frequency signal. The filter circuit arrangement has a second tunable filter arranged parallel to the first tunable filter in the phase regulation loop. The first tunable filter and the second tunable filter exhibit different attenuation characteristics and are fashioned and connected within the phase regulation loop so that: a capture range of the filter circuit arrangement, in which a tuning of the phase regulation loop to a radio-frequency signal to be filtered is possible is dominated by the attenuation characteristic of the second tunable filter, and so that the transmission behavior of the filter circuit arrangement in operation is dominated by the attenuation characteristic of the first tunable filter, given a tuned phase regulation loop. A circuit arrangement for generation of a local oscillator signal has an oscillation generator and a filter circuit arrangement as described above arranged downstream of the oscillation generator.

Abstract translation: 用于对射频信号进行滤波的滤波器电路装置具有第一可调滤波器和相位调节环路，以便将第一可调滤波器保持在相对于射频信号的频率的传输相位恒定。 滤波器电路装置具有在相位调节环路中平行于第一可调谐滤波器布置的第二可调谐滤波器。 第一可调谐滤波器和第二可调谐滤波器具有不同的衰减特性，并且在相位调节环路内形成和连接，使得：滤波器电路装置的捕获范围，其中相调节环路调谐到射频信号 要被滤波的是可能的，由第二可调谐滤波器的衰减特性所支配，并且使得在给定调谐相位调节环路的情况下，在操作中的滤波器电路装置的传输行为由第一可调滤波器的衰减特性支配。 用于产生本地振荡器信号的电路装置具有布置在振荡发生器下游的振荡发生器和如上所述的滤波器电路装置。

公开(公告)号：US20060100860A1

公开(公告)日：2006-05-11

申请号：US11250824

申请日：2005-10-14

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: G10L19/00

CPC classification number: H04B1/66 ,  G01R33/3621 ,  G01R33/3692

Abstract: In a method and apparatus for transmission of signals, an input signal is supplied to at least one dynamic compressor and the dynamics of the signal is compressed by the dynamic compressor with a degree of compression. The compressed signal is subsequently adapted, in particular limited, in terms of its frequency bandwidth dependent on the degree of compression, such as directly dependent on the degree of compression or dependent on a reference value directly associated with the degree of compression, such as the input level of the signal before the dynamic compressor.

Abstract translation: 在用于传输信号的方法和装置中，输入信号被提供给至少一个动态压缩器，并且动态压缩器以一定程度的压缩将信号的动力学压缩。 压缩信号随后适应，特别是根据其频率带宽取决于压缩程度，例如直接取决于压缩程度或依赖于与压缩程度直接相关的参考值，例如 动态压缩机前的信号输入电平。

公开(公告)号：US06580317B1

公开(公告)日：2003-06-17

申请号：US09672630

申请日：2000-09-28

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H03F136

CPC classification number: H03F3/45475 ,  H03F1/26 ,  H03F1/34 ,  H03F1/56 ,  H03F2200/372

Abstract: An amplifier includes a first broadband amplifier element (20) having a first and a second input (21 and 22, respectively) and also a first output (23). The first output (23) is fed back via a first and a second negative feedback path (30 and 40, respectively) to the first and second input (21 and 22, respectively). The first negative feedback path (30) includes a controlled current source (31), which brings about a reduction in the noise contribution of the second negative feedback path (40) and also a real finite input impedance.

Abstract translation: 放大器包括具有第一和第二输入（分别为21和22）以及第一输出（23）的第一宽带放大器元件（20）。 第一输出（23）经由第一和第二负反馈路径（分别为30和40）反馈到第一和第二输入端（21和22）。 第一负反馈路径（30）包括受控电流源（31），其导致第二负反馈路径（40）的噪声贡献的降低以及实际有限输入阻抗。

公开(公告)号：US06269052B1

公开(公告)日：2001-07-31

申请号：US09375069

申请日：1999-08-16

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H04B140

CPC classification number: G01S7/52017 ,  G01N29/11 ,  G01N29/34 ,  G01N29/36 ,  G01N2291/0231 ,  G01N2291/044 ,  H04R3/02 ,  Y10S367/903

Abstract: The circuit and the method serve to transmit a transmission signal to a transducer and to receive a reception signal from the transducer. The transmitter and the receiver are each alternatively coupled to the transducer and decoupled from one another. The coupling and decoupling is thereby achieved by a total of three nonlinear two-terminal networks (Z1, Z2, Z3). The transmitter is connected to the transducer via a bipolar voltage limiter and the receiver is connected to the transducer via a bipolar current limiter.

Abstract translation: 电路和方法用于将传输信号传送到换能器并从换能器接收接收信号。 发射器和接收器各自可选地耦合到换能器并且彼此分离。 因此，通过总共三个非线性两端网络（Z1，Z2，Z3）实现耦合和去耦。 变送器通过双极性限压器连接到换能器，接收器通过双极限流器连接到换能器。

公开(公告)号：US5724312A

公开(公告)日：1998-03-03

申请号：US632815

申请日：1996-04-17

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: B06B1/02 ,  H03G1/00 ,  H03G3/00 ,  G01S7/526

CPC classification number: B06B1/0207 ,  H03G1/0064 ,  H03G3/00

Abstract: An ultrasound transducer head that contains at least one transducer element, which receives ultrasound signals and converts them into electrical receive signals, and an amplifier device, which electrically amplifies the receive signals of the transducer element. The amplifier device contains at least one capacitive component, preferably a controllable capacitive diode. The gain of the amplifier device can be varied as a function of the capacitance of the capacitive component. A virtually loss-free gain is obtained over a large dynamic response range.

Abstract translation: 一种超声波换能器头，其包含至少一个接收超声信号并将其转换成电接收信号的换能器元件，以及电放大换能器元件的接收信号的放大器装置。 放大器装置包含至少一个电容部件，优选地是可控制的电容二极管。 放大器装置的增益可以作为电容部件的电容的函数而变化。 在大的动态响应范围内可以获得几乎无损的增益。

公开(公告)号：US5574372A

公开(公告)日：1996-11-12

申请号：US374028

申请日：1995-01-18

Applicant: Michael Moritz ,  Ralph Oppelt ,  Wilhelm Duerr

Inventor： Michael Moritz ,  Ralph Oppelt ,  Wilhelm Duerr

IPC: A61B5/055 ,  G01R33/422 ,  G01R33/28

CPC classification number: A61B5/055 ,  G01R33/422

Abstract: In a diagnostic magnetic resonance apparatus having an examination space, a radio-frequency antenna and a gradient coil system, the radio-frequency antenna is arranged closer to the examination space than is the gradient coil system. A radio-frequency shield arranged between the radio-frequency antenna and the gradient coil system, and has a first electrically conductive layer arrangement and a second electrically conductive layer arrangement arranged lying opposite the first arrangement, these being separated from one another by a dielectric. The layer arrangements have interconnects arranged side-by-side that are separated from one another by electrically insulating slots. The slots of the first layer arrangement are arranged offset relative to the slots in the second layer arrangement. Neighboring interconnects in at least one layer arrangement are connected to one another via bridges that conduct high-frequency currents, the bridges being arranged such that currents induced in the layer arrangement by the radio-frequency antenna can essentially flow only between the neighboring interconnects via the bridges.

Abstract translation: 在具有检查空间的诊断用磁共振装置，射频天线和梯度线圈系统中，与梯度线圈系统相比，射频天线配置得比检查空间更近。 布置在射频天线和梯度线圈系统之间的射频屏蔽，并且具有布置成与第一布置相对的第一导电层布置和第二导电层布置，它们通过电介质彼此分离。 层布置具有并排布置的互连，其通过电绝缘槽相互分离。 第一层布置的槽相对于第二层布置中的槽布置成偏置。 至少一层结构中的相邻互连通过传导高频电流的桥连接，桥被布置成使得由射频天线在层布置中感应的电流本质上只能在相邻互连之间经由 桥梁

公开(公告)号：US5200701A

公开(公告)日：1993-04-06

申请号：US761650

申请日：1991-09-18

Applicant: Horst Siebold ,  Ralph Oppelt ,  Guenter Ries

Inventor： Horst Siebold ,  Ralph Oppelt ,  Guenter Ries

IPC: G01R33/385

CPC classification number: G01R33/385

Abstract: A magnetic resonance imaging apparatus for producing tomograms has a C-magnet with substantially planar pole faces for generating a magnetic field in the direction of the z-axis of a Cartesian coordinate system, for examining a human body having a body axis extending in the direction x-axis, the region to be examined being disposed between the pole pieces, gradient coils substantially parallel to the pole pieces, and a regulator for controlling the gradient currents of the gradient coils using the magnetic flux associated with each gradient coil as the measure value effecting such control. The gradient currents are adjusted dependent on disturbances in the magnetic flux which are caused by eddy currents and saturation effects in the ferromagnetic material in the proximity of the pole faces. Such a regulator can also be used in combination with gradient coils for generating a gradient in the z-direction for compensating for transient inhomogeneities in the main magnetic field.

Abstract translation: 用于产生断层图像的磁共振成像装置具有C形磁体，其具有基本上平面的极面，用于在笛卡尔坐标系的z轴方向上产生磁场，用于检查具有沿着方向延伸的主体轴的人体 x轴，待检查的区域设置在极靴之间，基本上平行于极靴的梯度线圈和用于使用与每个梯度线圈相关联的磁通量作为测量值来控制梯度线圈的梯度电流的调节器 实现这种控制。 梯度电流根据在磁极附近的铁磁材料中的涡流和饱和效应引起的磁通量的扰动来调节。 这种调节器也可以与梯度线圈组合使用，用于在z方向上产生梯度以补偿主磁场中的瞬态不均匀性。

公开(公告)号：US5153517A

公开(公告)日：1992-10-06

申请号：US626442

申请日：1990-12-12

Applicant: Ralph Oppelt ,  Wilhelm Duerr ,  Horst Siebold

Inventor： Ralph Oppelt ,  Wilhelm Duerr ,  Horst Siebold

IPC: A61B5/055 ,  G01R33/34 ,  G01R33/341

CPC classification number: G01R33/3678 ,  G01R33/341

Abstract: A surface resonator for use in a magnetic resonance imaging apparatus having a transversal fundamental magnetic field is composed of two sub-systems, each generating a magnetic field with the magnetic fields being perpendicular relative to each other. Each sub-system contains two current loops, both of which enclose the magnetic field allocated to them in the same plane. A circularly polarizing surface resonator is thus obtained for the transversal fundamental magnetic field.

Abstract translation: 用于具有横向基本磁场的磁共振成像装置的表面谐振器由两个子系统组成，每个子系统产生磁场，磁场相对于彼此垂直。 每个子系统包含两个电流回路，两个电流环都包含在同一平面上分配给它们的磁场。 因此获得了用于横向基本磁场的圆偏振面谐振器。