公开(公告)号：US06573788B2

公开(公告)日：2003-06-03

申请号：US09908247

申请日：2001-07-18

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H03F1500

CPC classification number: H03F1/486 ,  H03F1/56 ,  H03H11/44

Abstract: The amplifier device serves the purpose of broadband amplification of an electric input signal fed from a signal source. It has an amplifier input for feeding the input signal, and a broadband amplifier element. Provided for the purpose of compensating a source reactance active at a source output is an amplifier reactance which is active at the amplifier input and is determined by an input impedance of a current-reversing negative impedance converter. The useful bandwidth for the input signal is raised thereby.

公开(公告)号：US06492817B2

公开(公告)日：2002-12-10

申请号：US09861759

申请日：2001-05-21

Applicant: Matthias Gebhardt ,  Ralph Oppelt ,  Markus Vester

Inventor： Matthias Gebhardt ,  Ralph Oppelt ,  Markus Vester

IPC: G01V300

CPC classification number: G01R33/28

Abstract: An electrical conductor arrangement has conductor meshes that are arranged in areas with limiting lines defined by a network structure, and into which control devices are connected for the control of currents within the conductor arrangement.

Abstract translation: 电导体布置具有布置在由网络结构限定的限制线的区域中的导体网格，并且其中连接有控制装置以控制导体布置内的电流。

公开(公告)号：US5603324A

公开(公告)日：1997-02-18

申请号：US426341

申请日：1995-04-21

Applicant: Ralph Oppelt ,  Markus Vester

Inventor： Ralph Oppelt ,  Markus Vester

IPC: G01S7/523 ,  H03K17/687 ,  A61B8/00

CPC classification number: G01S7/523 ,  H03K17/687

Abstract: A duplexer for an ultrasound imaging system is capable of selectively coupling a transducer element to either a transmitter or a receiver, depending on whether the imaging system is in the transmit mode or receive mode. The duplexer contains a field-effect transistor whose source and drain are connected between the transducer element and the receiver. The gate of the field effect transistor may either be driven with a control voltage or short-circuited to the source. In this manner, one obtains an improved duplexer that operates with virtually no power loss, without drive circuits, without leakage currents, and with low noise.

Abstract translation: 用于超声成像系统的双工器能够根据成像系统是处于发送模式还是接收模式，将换能器元件选择性地耦合到发射器或接收器。 双工器包含场效应晶体管，其源极和漏极连接在换能器元件和接收器之间。 场效应晶体管的栅极可以用控制电压驱动或与源短路。 以这种方式，获得一种改进的双工器，其实际上没有功率损耗，没有驱动电路，没有漏电流，并且噪声低。

公开(公告)号：US4951012A

公开(公告)日：1990-08-21

申请号：US333286

申请日：1989-04-05

Applicant: Ralph Oppelt ,  Markus Vester

Inventor： Ralph Oppelt ,  Markus Vester

IPC: H01P5/02 ,  H03H7/38

CPC classification number: H03H7/383

Abstract: An impedance transformation comprising a plurality of elementary tranformers which can be used as impedance converters for radio frequency antennas of a nuclear magnetic resonant tomograph system. At least one combination of a parallel circuit and a series circuit using inner conductors and the outer conductors exists at the primary side of the transformer and at the secondary side of the elementary transformers. Nearly all arbitrary transformation ratios can be obtained with the line transformers of the invention.

Abstract translation: 一种阻抗变换，包括可用作核磁共振断层摄影系统的射频天线的阻抗变换器的多个基本变形器。 使用内部导体和外部导体的并联电路和串联电路的至少一个组合存在于变压器的初级侧和基本变压器的次级侧。 利用本发明的线路变压器可以获得几乎所有的任意变换比。

公开(公告)号：US4922204A

公开(公告)日：1990-05-01

申请号：US330110

申请日：1989-03-29

Applicant: Wilhelm Duerr ,  Ralph Oppelt

Inventor： Wilhelm Duerr ,  Ralph Oppelt

IPC: G01R33/32 ,  A61B5/055 ,  G01R33/34 ,  G01R33/36

CPC classification number: G01R33/3685

Abstract: For operating the radio-frequency antenna of a nuclear magnetic resonance tomography apparatus, the antenna being connected to an asymmetrical line, a sheath wave trap is provided between the antenna and the line, with the inductor of the sheath wave trap being a toroid. A low-scatter sheath wave trap is obtained in this manner, particularly suitable for circularly polarized resonators. The trap suppresses difference currents caused by asymmetries, and thus simultaneously functions as a balanced-to-unbalanced transformer (balun).

Abstract translation: 为了操作核磁共振断层摄影装置的射频天线，天线与非对称线路连接，在天线和线路之间设置鞘波陷阱，鞘波陷阱的电感器为环形线圈。 以这种方式获得低散射鞘波陷阱，特别适用于圆偏振谐振器。 陷波器抑制由不对称引起的差异电流，从而同时用作平衡 - 不平衡变压器（balun）。

公开(公告)号：US4841249A

公开(公告)日：1989-06-20

申请号：US105003

申请日：1987-10-06

Applicant: Wilhelm Duerr ,  Hartwig Ingwersen ,  Norbert Krause ,  Ralph Oppelt

Inventor： Wilhelm Duerr ,  Hartwig Ingwersen ,  Norbert Krause ,  Ralph Oppelt

IPC: G01R33/32 ,  A61B5/055 ,  G01R33/341 ,  G01R33/343

CPC classification number: G01R33/341 ,  G01R33/343

Abstract: A surface resonator for use in nuclear magnetic resonance tomography is a single turn loop of ribbon-like electrical conductor having spaced ends facing each other which form a capacitor whose capacitance determines the resonant frequency. The loop of ribbon-like conductor is shaped to conform substantially to the generated surface of a truncated cone. The ends of the loop may be in the form of spaced plates for providing the necessary capacitance, or may be connected by one or more discrete component capacitors.

Abstract translation: 用于核磁共振断层摄影的表面谐振器是带状电导体的单回路，其具有彼此面对的间隔开的端部，其形成电容器，其确定谐振频率。 带状导体的环形被成形为基本上符合产生的截头圆锥形表面。 环的端部可以是间隔开的板的形式，用于提供必要的电容，或者可以由一个或多个分立元件电容器连接。

公开(公告)号：US4661814A

公开(公告)日：1987-04-28

申请号：US716904

申请日：1985-03-28

Applicant: Bernd Granz ,  Ralph Oppelt ,  Bertram Sachs

Inventor： Bernd Granz ,  Ralph Oppelt ,  Bertram Sachs

IPC: G01S7/52 ,  B06B1/06 ,  G01S15/89 ,  H01L25/04 ,  H01L27/146 ,  H04Q9/00 ,  H04N3/15

CPC classification number: B06B1/0629 ,  H01L25/042 ,  H01L2924/0002

Abstract: A device for reading out two-dimensional charge patterns contains a receiver matrix (consisting of elementary transducers arranged in rows and columns) and a switching matrix (consisting of a carrier plate and electronic components in chip form) which are arranged on the long side of the carrier plate which faces away from the receiver matrix. A switchable amplifier in chip form is assigned to each of the elementary transducers connecting lines of at least approximately the same length are provided between contact lips and the corresponding switchable amplifiers, and signal output lines and ground lines run parallel to one another, while control lines run perpendicular to them. This design of the switching matrix makes the device unusually simple in its construction, with the amplifiers that are arranged on the long side of the carrier plate, which faces away from the receiver matrix, always being accessible, even after the device has been assembled. Thus, when individual image points drop out, the corresponding amplifiers can be replaced quickly and easily.

Abstract translation: 用于读出二维电荷模式的装置包含一个接收器矩阵（由以行和列排列的基本换能器组成）和一个开关矩阵（由载板和芯片形式的电子部件组成） 承载板背离接收矩阵。 芯片形式的可切换放大器被分配给每个基本传感器，连接至少大致相同长度的线路设置在接触唇缘和相应的可切换放大器之间，信号输出线和接地线彼此平行延伸，而控制线 垂直于它们运行。 开关矩阵的这种设计使得器件的结构异常简单，即使在器件组装之后，布置在承载板的远侧的放大器也是可以接近的，它们背离接收器矩阵。 因此，当各个图像点退出时，相应的放大器可以快速，容易地替换。