公开(公告)号：US20050270031A1

公开(公告)日：2005-12-08

申请号：US11139069

申请日：2005-05-27

Applicant: Ralph Oppelt ,  Markus Vester

Inventor： Ralph Oppelt ,  Markus Vester

IPC: G01R33/36 ,  G01V3/00

CPC classification number: G01R33/3614

Abstract: An antenna amplifier, in particular for a magnetic resonance antenna, has a sheath wave barrier integrated into the signal path of the antenna amplifier in the form of a component designed exclusively for transfer of a differential signal.

Abstract translation: 天线放大器，特别是用于磁共振天线的天线放大器具有集成到天线放大器的信号路径中的鞘波屏障，其以专门用于传送差分信号的部件的形式。

公开(公告)号：US20050140369A1

公开(公告)日：2005-06-30

申请号：US10993644

申请日：2004-11-19

Applicant: Thorsten Feiweier ,  Ralph Oppelt ,  Wolfgang Renz ,  Markus Vester

Inventor： Thorsten Feiweier ,  Ralph Oppelt ,  Wolfgang Renz ,  Markus Vester

IPC: G01R33/34 ,  G01R33/36 ,  G01V3/00

CPC classification number: G01R33/5659 ,  G01R33/246 ,  G01R33/34046 ,  G01R33/34061 ,  G01R33/3415 ,  G01R33/3607 ,  G01R33/5612

Abstract: A radio frequency transmitter arrangement for a magnetic resonance apparatus has a distribution unit and an antenna unit, wherein the antenna unit, to generate radio frequency fields, is fashioned in at least two orthogonal modes, and the distribution unit is fashioned for the division of an RF transmission signal into at least two mode feed signals. At least one adjustment unit is provided to adjust the amplitude and/or phase of one of the mode feed signals and is connected with the antenna unit such that each of the mode feed signals generates a radio frequency field in one of the modes. A multiple transmitter arrangement has at least two radio frequency transmitter arrangements and at least two 180° hybrids. A method is provided to determine at least one setting parameter of the adjustment unit.

Abstract translation: 用于磁共振装置的射频发射器装置具有分配单元和天线单元，其中生成射频场的天线单元以至少两个正交模式形成，并且分配单元被形成用于划分 RF传输信号转换成至少两个模式馈送信号。 提供至少一个调整单元以调整模式馈送信号之一的幅度和/或相位，并且与天线单元连接，使得每个模式馈送信号在其中一种模式中产生射频场。 多发射机布置具有至少两个射频发射机布置和至少两个180°混合。 提供了一种确定调节单元的至少一个设定参数的方法。

公开(公告)号：US20050077946A1

公开(公告)日：2005-04-14

申请号：US10960649

申请日：2004-10-08

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H03H1/00 ,  H03K17/16 ,  H03K17/62

CPC classification number: H03K17/6257 ,  H03H7/175 ,  H03H7/1775 ,  H03H7/427 ,  H03K17/16

Abstract: At least two inputs, at least one output and a clock source for the inputs are provided in a multiplexer. Each input balances an input signal and is coupled to a transistor circuit having two transistors with collectors commonly connected to a power potential. The transistor circuit can be supplied with a first balanced input signal on a first input signal path connected to the base of the first transistor, and with a second balanced input signal on a second input signal path connected to the base of the second transistor. The two balanced input signals are able to have a predetermined switching potential applied to them under the clocking of a driver circuit. In addition, two outgoing signal paths from the emitter of each transistor circuit can be combined to form at least two output signal paths for the at least one output. In this arrangement, the two output signal paths can be connected symmetrically with respect to a reference-ground potential.

Abstract translation: 在多路复用器中提供至少两个输入，至少一个用于输入的输出和时钟源。 每个输入平衡输入信号并且耦合到具有两个晶体管的晶体管电路，所述晶体管具有通常连接到功率电势的集电极。 晶体管电路可以在连接到第一晶体管的基极的第一输入信号路径上提供第一平衡输入信号，并且在连接到第二晶体管的基极的第二输入信号路径上具有第二平衡输入信号。 两个平衡输入信号能够在驱动器电路的时钟下具有施加到它们的预定开关电位。 此外，可以组合来自每个晶体管电路的发射极的两个输出信号路径以形成用于至少一个输出的至少两个输出信号路径。 在这种布置中，两个输出信号路径可以相对于参考地电位对称连接。

公开(公告)号：US06838936B2

公开(公告)日：2005-01-04

申请号：US10424509

申请日：2003-04-28

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H03F1/26 ,  H03F1/34 ,  H03F1/56 ,  H03F3/45 ,  H03F1/36

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

Abstract: The amplifier device contains a first amplifier element having a first input and a first output. The first output is fed back via a negative feedback path to the input. The negative feedback path contains a controlled current source which brings about a reduction in the noise and also a real finite input impedance.

Abstract translation: 放大器装置包括具有第一输入和第一输出的第一放大器元件。 第一个输出通过负反馈路径反馈到输入端。 负反馈路径包含受控的电流源，其导致噪声的降低以及实际的有限输入阻抗。

公开(公告)号：US06445219B1

公开(公告)日：2002-09-03

申请号：US09531194

申请日：2000-03-20

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H03D300

CPC classification number: G01R23/06 ,  H03K9/06

Abstract: In the process for converting a frequency signal to a DC voltage according to the invention a first and a second output voltage signal (UA1, UA2) are generated from the frequency signal. Each of the output voltage signals is a sequence of rectangular pulses the pulse sequence frequency of which is equal to a frequency f of the frequency signal. These are converted with a first and a second lowpass filter to a first DC voltage signal and a second DC voltage signal, respectively, with the second DC voltage signal being used to influence the pulse width T0 of the rectangular pulses of at least the first output voltage signal. This makes it possible to build a simple frequency-to-voltage converter using cost-effective standard monoflops in which a largely linear correlation between frequency f of the frequency signal and the magnitude of the first DC voltage signal is realized in a simple manner.

Abstract translation: 在根据本发明的将频率信号转换为DC电压的过程中，从频率信号产生第一和第二输出电压信号（UA1，UA2）。 每个输出电压信号是脉冲序列频率等于频率信号的频率f的一系列矩形脉冲。 它们分别由第一和第二低通滤波器转换成第一直流电压信号和第二直流电压信号，第二直流电压信号用于影响至少第一输出的矩形脉冲的脉冲宽度T0 电压信号。 这使得可以使用成本有效的标准单波形来构建简单的频率 - 电压转换器，其中以简单的方式实现频率信号的频率f与第一直流电压信号的幅度之间的大量线性相关。

公开(公告)号：US6083164A

公开(公告)日：2000-07-04

申请号：US116315

申请日：1998-07-15

Applicant: Ralph Oppelt ,  David A. Petersen

Inventor： Ralph Oppelt ,  David A. Petersen

IPC: B06B1/02 ,  G01S7/524 ,  G01S7/526 ,  A61B8/00

CPC classification number: B06B1/0215 ,  G01S7/524 ,  G01S7/526 ,  G01S7/5202

Abstract: An ultrasound front end circuit (1000) according to the present invention includes a single transformer core which performs all of the pulse and transmit/receive switching functions. A transmit pulser (1102) is formed by a pair of transistor switches in combination with a transformer having first windings (N1, N2) driven by a DC source. A secondary winding (N3) provides a voltage step up for transmitted wave forms and a pair of anti-parallel shunt diodes (1014) on the receiver terminal direct the transmitted 0 waveform to the ultrasound transducer (1024). A floating third winding (N4) shunted by a current biased diode bridge (1002) provides an effective open circuit across the secondary winding while transmitting high amplitude signals. The third winding (N4) and diode bridge (1002) act to short circuit the secondary winding (N3) while receiving small amplitude signals, thus providing a direct connection between the transducer (1024) and receiver (1020).

Abstract translation: 根据本发明的超声波前端电路（1000）包括执行所有脉冲和发送/接收切换功能的单个变压器铁芯。 发射脉冲发生器（1102）由一对晶体管开关与具有由DC源驱动的第一绕组（N1，N2）的变压器组合形成。 次级绕组（N3）为发射波形提供升压电压，并且接收器端子上的一对反并联分流二极管（1014）将发射的0波形引导到超声换能器（1024）。 由电流偏置二极管电桥（1002）分流的浮置第三绕组（N4）在传输高幅度信号的同时在次级绕组上提供有效开路。 第三绕组（N4）和二极管桥（1002）用于在接收小振幅信号的同时使次级绕组（N3）短路，从而在换能器（1024）和接收器（1020）之间提供直接连接。

公开(公告)号：US5144241A

公开(公告)日：1992-09-01

申请号：US567739

申请日：1990-08-15

Applicant: Ralph Oppelt ,  Wilhelm Duerr ,  Horst Siebold

Inventor： Ralph Oppelt ,  Wilhelm Duerr ,  Horst Siebold

IPC: G01R33/32 ,  A61B5/055 ,  G01R33/34 ,  G01R33/343

CPC classification number: G01R33/343

Abstract: A circularly polarizing RF antenna suitable for use in an MRI apparatus for obtaining tomograms of an examination subject includes two antenna systems, each having a winding, having two lateral legs and a middle leg, and a return path which form a resonant circuit in combination with one or more resonant capacitors. The middle legs of the two antenna systems are disposed so that they cross one another. One or more decoupling capacitors are provided between the two antenna systems. A circularly polarizing antenna for a magnetic resonance imaging system is thus obtained having a magnetic field vector in the imaging region which rotates in planes parallel to the pole surfaces of a C-shaped magnet which generates the fundamental magnetic field in the magnetic resonance imaging apparatus.

Abstract translation: 适用于MRI装置中用于获取检查对象的断层图像的圆偏振RF天线包括两个天线系统，每个天线系统具有绕组，具有两个横向腿和中间支腿，以及一个形成谐振电路的返回路径，与 一个或多个谐振电容器。 两个天线系统的中间腿被布置成使得它们彼此交叉。 在两个天线系统之间提供一个或多个去耦电容器。 因此，获得了一种用于磁共振成像系统的圆极化天线，其在成像区域中具有磁场矢量，该磁场矢量在平行于在磁共振成像装置中产生基本磁场的C形磁体的极面平行的平面中旋转。

公开(公告)号：US4992769A

公开(公告)日：1991-02-12

申请号：US442541

申请日：1989-11-28

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H01F19/06 ,  H01F19/00 ,  H01F27/28

CPC classification number: H01F27/2804 ,  H01F2027/2809

Abstract: A line transformer suited for coupling the antenna of a nuclear magnetic resonance tomography apparatus to the RF transmission and reception circuitry is formed by a flat dielectric substrate having two congruent interconnect structures on the opposite major faces thereof. Each of the interconnect structures has two patterns of concentric conductor runs or strips, which are arranged mirror-symmetrically relative to a symmetry axis on both major faces of the substrate. The symmetry axes proceed parallel to each other, and are in registry with each other. A four port differential transformer without ferromagnetic material is obtained, which behaves symmetrically relative to the third and fourth ports, as seen from the first port as well as from the second port.

Abstract translation: 适用于将核磁共振断层摄影装置的天线耦合到RF发射和接收电路的线路变压器由在其相对的主面上具有两个一致互连结构的扁平电介质基片形成。 每个互连结构具有两个同心导体线或带的图案，其相对于衬底的两个主面上的对称轴被镜像对称地布置。 对称轴彼此平行并彼此对齐。 获得了没有铁磁材料的四端口差动变压器，其从第一端口以及从第二端口看，相对于第三和第四端口对称地起作用。

公开(公告)号：US4945321A

公开(公告)日：1990-07-31

申请号：US333287

申请日：1989-04-05

Applicant: Ralph Oppelt ,  Markus Vester

Inventor： Ralph Oppelt ,  Markus Vester

IPC: H01P5/16 ,  H03H7/21 ,  H03H7/48

CPC classification number: H03H7/48 ,  H03H7/21

Abstract: In a .pi./2 power divider, particularly a .pi./2 hybrid for the radio-frequency antenna of a nuclear magnetic resonance tomography apparatus, a decoupling circuit having unbalanced-to-ground line transformers is provided. Each branch thereof contains an all pass network consisting unbalanced-to-ground line transformers at the output. A broadband .pi./2 hybrid is obtained particularly with a broadband 3 dB/180.degree. hybrid as the decoupling circuit.

Abstract translation: 在π/ 2功率分配器中，特别是用于核磁共振断层摄影装置的射频天线的pi / 2混合器，提供了具有不平衡对地线路变压器的去耦电路。 其每个分支都包含一个全输出网络，其中包括输出端的不平衡对地线路变压器。 获得宽带pi / 2混合电路，特别是采用宽带3 dB / 180°混合电路作为去耦电路。

公开(公告)号：US09847567B2

公开(公告)日：2017-12-19

申请号：US14618128

申请日：2015-02-10

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H01P5/18 ,  H03H7/38 ,  G01R33/34 ,  G01R33/36 ,  H01F30/02 ,  H01F38/14 ,  H03H7/48 ,  H01F38/02

CPC classification number: H01P5/18 ,  G01R33/34092 ,  G01R33/36 ,  H01F30/02 ,  H01F38/023 ,  H01F38/14 ,  H01F2038/026 ,  H01F2038/146 ,  H03H7/38 ,  H03H7/48

Abstract: The embodiments relate to a directional coupler including, in each case, one connection for a first, a second, a third, and a fourth port. The coupler includes a first coupling network for providing the connection for the first port and a second coupling network for providing the connection for the second port. The first and second coupling networks are both connected to the connections for the third and fourth ports, wherein the second coupling network has a first inductance connected between the third port and an electrical reference potential, a first capacitance connected between the fourth port and the electrical reference potential, a second capacitance connected between the third port and the second port, and a second inductance connected between the fourth port and the second port.