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。

公开(公告)号：US5144239A

公开(公告)日：1992-09-01

申请号：US565137

申请日：1990-08-10

Applicant: Ralph Oppelt ,  Horst Siebold

Inventor： Ralph Oppelt ,  Horst Siebold

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

CPC classification number: G01R33/3678 ,  G01R33/34076 ,  G01R33/34007

Abstract: A circularly polarizing RF antenna suitable for use in a magnetiic resonance imaging tomography apparatus has four current loops, each formed by two U-shaped conductors with the ends of the lateral legs of the U-shaped conductors disposed opposite to each other in mirror-symmetric fashion, and the ends of the lateral legs being bridged by a resonant capacitor. The current loops are arranged on a carrier which forms a portion of a hollow cylinder, and which is divided in an axial direction between two of the current loops, so that at least one of the current loops is removable without electrical contacts. A divisible RF antenna is thus achieved into which a head or a knee joint can be easily introduced for imaging.

Abstract translation: 适用于磁共振成像断层摄影装置的圆偏振RF天线具有四个电流回路，每个由两个U形导体形成，其U形导体的侧支腿的端部彼此相对设置成镜像对称 时尚，并且侧腿的端部被谐振电容器桥接。 电流回路布置在形成中空圆柱体的一部分并且在两个电流回路之间沿轴向方向分开的载体上，使得至少一个电流回路可移除而没有电接触。 因此可以实现可分割的RF天线，其中可以容易地引入头部或膝关节以用于成像。

公开(公告)号：US4592029A

公开(公告)日：1986-05-27

申请号：US503798

申请日：1983-06-13

Applicant: Franz Altmann ,  Bernd Granz ,  Dieter Grenda ,  Ralph Oppelt

Inventor： Franz Altmann ,  Bernd Granz ,  Dieter Grenda ,  Ralph Oppelt

IPC: H04N5/335 ,  B06B1/06 ,  G01S15/89 ,  H01L25/11

CPC classification number: B06B1/0629 ,  H01L25/112 ,  H01L2924/0002 ,  H01L2924/3011

Abstract: An array device having a plurality of stacked circuit boards, each having a recess in a flat side thereof which extends parallel to a narrow side; the recess containing electronic components. Control lines for the electronic components are arranged on a flat side of the circuit board. Each circuit board has a narrow side which is provided with electrodes which are ordered as a matrix in rows and columns. The electrodes of the circuit boards are each associated with a respective switchable amplifier. The switchable amplifiers are arranged one behind the other in the longitudinal direction of a recess, and are connected by respective conductors having substantially equal lengths for coupling the switchable amplifiers to their respective electrodes. A plurality of main control lines are arranged on the narrow sides of the circuit boards for connecting the control lines of the switchable amplifiers in the same column to one another. Thus, the number of electrodes in each row can be increased without being required to be an integral multiple of the inputs of electronic modules.

Abstract translation: 一种具有多个堆叠电路板的阵列器件，每个堆叠电路板均具有平行于窄边延伸的平坦侧凹槽; 所述凹部包含电子部件。 用于电子部件的控制线布置在电路板的平坦侧上。 每个电路板具有窄边，其具有以行和列排列成矩阵的电极。 电路板的电极各自与相应的可切换放大器相关联。 可切换放大器在凹部的纵向方向上一个接一个地布置，并且通过具有基本上相等长度的相应导体连接，以将可切换放大器耦合到它们各自的电极。 多个主控制线布置在电路板的窄边上，用于将同一列中的可切换放大器的控制线彼此连接。 因此，可以增加每行中的电极数量，而不需要是电子模块的输入的整数倍。

公开(公告)号：US09780727B2

公开(公告)日：2017-10-03

申请号：US13934183

申请日：2013-07-02

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H03B5/12 ,  H03C3/09 ,  H03C3/00 ,  H03C3/22 ,  H03L7/099 ,  G01R33/36

CPC classification number: H03C3/00 ,  G01R33/36 ,  H03B2200/004 ,  H03B2201/011 ,  H03B2201/0208 ,  H03C3/22 ,  H03L7/099

Abstract: A frequency modulator includes a first pair of diodes with two capacity diodes, and a second pair of diodes with two additional capacity diodes. The second pair of diodes is employed in parallel. The frequency modulator also includes a first modulator input for reception of a first modulation signal and a second modulator input for reception of a symmetrical second modulation signal. Both pairs of diodes are coupled to an oscillator unit.

公开(公告)号：US09778330B2

公开(公告)日：2017-10-03

申请号：US13931611

申请日：2013-06-28

Applicant: Ralph Oppelt ,  Jian Min Wang

Inventor： Ralph Oppelt ,  Jian Min Wang

IPC: G01R33/28 ,  H04B3/02 ,  G01R33/36 ,  H04B3/50 ,  G01R33/3415

CPC classification number: G01R33/28 ,  G01R33/3415 ,  G01R33/3621 ,  H04B3/02 ,  H04B3/50

Abstract: A method for simultaneous transmission of at least two high-frequency transmission signals via a common high-frequency line includes providing at least two input signals at respective inlet ports. The input signals are signals of a same carrier frequency. From the input signals, respective transmission signals are provided with different transmission frequencies from each other and from the carrier frequency by mixing the input signals using one frequency mixer each. The frequency mixers are supplied with respective mixer oscillator signals. The transmission signals are transmitted via the common high-frequency line. The mixer oscillator signals are provided from a same oscillator signal.

公开(公告)号：US20140347143A1

公开(公告)日：2014-11-27

申请号：US14284114

申请日：2014-05-21

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H03H7/42

CPC classification number: H01P1/18 ,  H01P5/16 ,  H03H7/42

Abstract: A balancing circuit comprises a first conductor path and a second conductor path. The first and second conductor paths are arranged in parallel with one another with respect to a signal flow. The first conductor path and the second conductor path are formed by a first stage and a second stage. The first conductor path has a high-pass member that is assigned to the first stage and a high-pass member that is assigned to the second stage. The second conductor path has a low-pass member that is assigned to the first stage and a low-pass member that is assigned to the second stage. Each high-pass member is designed to shift a signal forward in terms of phase by a predetermined amount, and each low-pass member is designed to shift a signal backward in terms of phase by a predetermined amount, in order to generate a balanced or unbalanced signal.

Abstract translation: 平衡电路包括第一导体路径和第二导体路径。 第一和第二导体路径相对于信号流量彼此平行地布置。 第一导体路径和第二导体路径由第一阶段和第二阶段形成。 第一导体路径具有分配给第一级的高通部件和分配给第二级的高通部件。 第二导体路径具有分配给第一级的低通构件和分配给第二级的低通构件。 每个高通部件被设计成将信号在相位上向前移动预定量，并且每个低通部件被设计成将信号在相位上向后移位预定量，以便产生平衡或 不平衡信号。