公开(公告)号：EP2005218A2

公开(公告)日：2008-12-24

申请号：EP07755003.6

申请日：2007-04-06

Applicant: The Government of the United States of America, represented by the Secretary, Department of Health and Human Services

Inventor： NASCIMENTO, George, C. ,  SILVA, Afonso, C.

IPC: G01V3/00

CPC classification number: G01R33/365 ,  G01R33/3415 ,  H03F1/565 ,  H03F3/191 ,  H03F3/211 ,  H03F2200/534 ,  H03F2200/537 ,  H03F2200/541

Abstract: An apparatus for imaging includes: a radio frequency (RF) coil array having a first RF coil and at least one additional RF coil, where the RF coil array is adapted to generate an image signal; a preamplifier having an input impedance, where the preamplifier is adapted to receive the image signal from the first RF coil; and a transformer to couple the first RF coil to the preamplifier, where impedance of the transformer is adapted to match the input impedance of the preamplifier.

公开(公告)号：EP1983572A1

公开(公告)日：2008-10-22

申请号：EP07106538.7

申请日：2007-04-19

Applicant: INTERUNIVERSITAIR MICROELEKTRONICA CENTRUM VZW ,  VRIJE UNIVERSITEIT BRUSSEL

Inventor： Borremans, Jonathan ,  Linten, Dimitri ,  Wambacq, Piet

IPC: H01L27/02 ,  H03F1/52

CPC classification number: H01L27/0251 ,  H03F1/223 ,  H03F1/523 ,  H03F3/19 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2200/492 ,  H03F2200/534 ,  H03F2200/541

Abstract: A method for co-designing an electrostatic discharge protection circuit with an analog circuit is presented. The analog circuit comprises a plurality of functional components with predetermined electric properties for achieving a predetermined analog performance. At least one of said functional components is an inductor. The method comprises the steps of coupling an ESD inductor with said inductor such that an ESD transformer is formed providing ESD protection to said analog circuit. The inductors are preferably designed in a common area, for example on top of each other or interleaved. Further, analog circuits designed according to the method are presented, for example a low noise amplifier, a power amplifier and an oscillator.

Abstract translation: 提出了一种使用模拟电路共同设计静电放电保护电路的方法。 模拟电路包括具有预定电特性的多个功能部件，以实现预定的模拟性能。 所述功能部件中的至少一个是电感器。 该方法包括以下步骤：将ESD电感器与所述电感器耦合，使得形成ESD变压器以向所述模拟电路提供ESD保护。 电感器优选地设计在公共区域中，例如彼此顶部或交错地设计。 此外，还提出了根据该方法设计的模拟电路，例如低噪声放大器，功率放大器和振荡器。

公开(公告)号：EP1854209A2

公开(公告)日：2007-11-14

申请号：EP06718960.5

申请日：2006-01-17

Applicant: Amalfi Semiconductor, Inc.

Inventor： BURNS, Lawrence ,  WOO, Chong

IPC: H03F3/68

CPC classification number: H03F3/602 ,  H01P5/10 ,  H03F3/45475 ,  H03F2200/06 ,  H03F2200/534

Abstract: A multi-input power combiner includes a balun (116) with a plurality of layers. A plurality of transmission lines (120) are associated with a pluralityof layers. The Balun has a largest dimension that is less than half of a ¼ wavelength in a selected material.

Abstract translation: 多输入功率组合器包括具有多个层的平衡 - 不平衡变换器（116）。 多个传输线（120）与多个层相关联。 Balun的最大尺寸小于选定材料中1/4波长的一半。

公开(公告)号：EP1401097A4

公开(公告)日：2005-01-19

申请号：EP02738857

申请日：2002-06-28

Applicant: HARADA IND CO LTD

Inventor： ISHIBAYASHI KATSUSHIRO

IPC: H03F3/191 ,  H03F3/193 ,  H03F1/34

CPC classification number: H03F3/1935 ,  H03F3/191 ,  H03F3/193 ,  H03F2200/366 ,  H03F2200/534

Abstract: An FM antenna amplifier including a transformer (T) having a primary winding whose one end is connected to an input terminal to which a signal received by an FM antenna is fed and a secondary winding whose one end is fed with power supply voltage and whose arbitrary middle point is connected to an output terminal and a plurality of FETs, for example, three FETs (21 to 23) each having a source connected to the other end of the first winding of this transformer (T) in parallel, a drain connected to the other end of the secondary winding of the transformer in parallel, and a gate grounded.

公开(公告)号：EP1372260A3

公开(公告)日：2004-06-16

申请号：EP03019830.3

申请日：1998-12-01

Applicant: Korg Inc.

Inventor： Mori, Yasuhiko ,  Mieda, Fumio ,  Mitoma, Hirofumi

IPC: H03F5/00 ,  H03F3/26

CPC classification number: H03F3/20 ,  H03F3/26 ,  H03F5/00 ,  H03F2200/03 ,  H03F2200/534 ,  H03F2200/537 ,  H03F2200/541 ,  H03F2200/549

Abstract: Output signals given from a tube amplifier (5) are amplified by a small number of vacuum tubes with maintaining the output property of the output signals. A second circuit (C2) is arranged in parallel to a first circuit (C1) wherein the output signals given from a vacuum tube (VA1) is flowing, and a node of the first circuit (C1) and the second circuit (C2) is connected to an input terminal of an output transformer (TR(1)). Since electric current proportioned to current level flowing in the first circuit (C1) flows into the second circuit (C2), current which amplified the output signals given from the vacuum tube (VA1) flows into the primary side of the output transformer (TR(1)). Consequently, by using the tube amplifier containing the small number of vacuum tubes, it is possible to obtain high output power as if it is obtainable by using a large number of vacuum tubes.

公开(公告)号：EP0920125A3

公开(公告)日：2001-10-17

申请号：EP98122440.5

申请日：1998-11-26

Applicant: NEC CORPORATION

Inventor： Kakuta, Yuji ,  Fukasawa, Yoshiaki ,  Taguchi, Yuichi

IPC: H03F3/26

CPC classification number: H03F1/22 ,  H03F1/42 ,  H03F3/26 ,  H03F2200/36 ,  H03F2200/534 ,  H03F2200/541 ,  H03F2200/63

Abstract: A push-pull wideband semiconductor amplifier for use in, for example, a CATV (cable television) system which suppresses deterioration of composite second-order (CSO) distortion in output signals. The push-pull wideband amplifier includes: a divider which divides a signal inputted by way of an input terminal into two signals of differing phase, a first and second amplifying circuit each of which amplifies the signal divided by the divider, and a combiner which combines the two signals amplified by the first and second amplifying circuits into one signal and outputs the result signal. The node between the first amplifying circuit and the second amplifying circuit is an imaginary ground point having a potential of 0 V from the standpoint of an alternating-current signal. A termination circuit is provided between this imaginary ground point and ground and absorbs fluctuation in potential generated at the imaginary ground point. In the event of fluctuation in potential generated at the imaginary ground point, the fluctuation in potential is absorbed by the termination circuit. The standing wave that accompanies fluctuation in potential is therefore not generated, and even-order distortion is suppressed.

Abstract translation: 一种用于例如CATV（有线电视）系统的推挽式宽带半导体放大器，其抑制输出信号中复合二阶（CSO）失真的劣化。 推挽式宽带放大器包括：除法器，其将通过输入端子输入的信号分成两个不同相位的信号;第一和第二放大电路，其每个放大由分频器分频的信号;以及组合器，其组合 由第一和第二放大电路放大的两个信号变成一个信号并输出​​结果信号。 第一放大电路和第二放大电路之间的节点是从交流信号的观点出发具有0V的电位的虚拟接地点。 在该虚拟接地点和地之间设置终端电路，并吸收在虚拟接地点产生的电位波动。 在虚拟接地点产生的电位波动的情况下，电位的波动由终端电路吸收。 因此不产生伴随电位波动的驻波，抑制偶数阶失真。

公开(公告)号：EP0660980B1

公开(公告)日：2000-06-07

申请号：EP93921607.3

申请日：1993-09-15

Applicant: ANALOGIC CORPORATION

Inventor： WEEDON, Hans ,  POULO, Louis, R. ,  SUNDAR, Ravindran ,  JONES, Mark, R. ,  LEE, Ching, Tin

IPC: H03F3/217 ,  H03F3/193 ,  H03F3/21 ,  H03F3/60

CPC classification number: H03F3/604 ,  H01L2924/181 ,  H03F3/193 ,  H03F3/211 ,  H03F2200/534 ,  H03F2200/54 ,  H03F2200/541 ,  H01L2924/00012

Abstract: Although known because of the high packaging inductances and thought to be wholly unsuitable for RF amplifiers, high voltage power switching MOSFETs (11, 12, 41, 42) of the type having coplanar leads having inductances on the order of between 8nH and 15nH are used in an RF amplifier. The individual devices (11, 12, 41, 42) operate on a high impedance load line to render the high inductance of the coplanar leads insignificant. The circuit configuration presents a high impedance to the output (14) via balun (20), eliminating the need for expensive combiners and low inductance packaging.

公开(公告)号：EP0836203A3

公开(公告)日：1998-05-20

申请号：EP97117432.1

申请日：1997-10-09

Applicant: NEC CORPORATION

Inventor： Kakuta, Yuji ,  Fukasawa, Yoshiaki ,  Shirakawa, Yasuhiro ,  Wakabayashi, Yoshiaki

IPC: H01F19/06

CPC classification number: H03F3/3098 ,  H01F19/04 ,  H01F2017/067 ,  H01F2027/2833 ,  H03F1/223 ,  H03F1/565 ,  H03F2200/534 ,  H03H7/42

Abstract: As an input transformer connected between an unbalance transmission line (10) and a balanced broadband amplifier (12) is used a transmission-line transformer (11) having a fixed middle potential. The transmission-line transformer (11) converts an input signal into two output signals having opposite phase each other which are supplied to the broadband amplifier (12). It is therefore possible to cancel secondary distortion in an amplifying unit. As the transmission-line transformer (11) is used a forced-balun type transmission-line transformer having two input ports (P1, P2) and three output ports (P3, P4, P5) one (P4) of which is grounded. Between the input ports and the output ports, first and second two-wire parallel lines are arranged via a signal glasses-shaped core having an impedance ratio of 1:(1/2):(1/2).

Abstract translation: 由于连接在不平衡传输线（10）和平衡宽带放大器（12）之间的输入变压器被用作具有固定中间电位的传输线变压器（11）。 传输线变压器（11）将输入信号转换为提供给宽带放大器（12）的彼此具有相反相位的两个输出信号。 因此可以消除放大单元中的二次失真。 由于传输线变压器（11）使用具有一个（P4）接地的两个输入端口（P1，P2）和三个输出端口（P3，P4，P5）的强制巴伦式传输线变压器。 在输入端口和输出端口之间，第一和第二双线平行线经由具有1：（1/2）:( 1/2）的阻抗比的信号玻璃形芯布置。

公开(公告)号：EP0652636A1

公开(公告)日：1995-05-10

申请号：EP94402467.8

申请日：1994-11-02

Applicant: THOMSON-CSF

Inventor： Gerfault, Bertrand, THOMSON-CSF, SCPI

IPC: H03F3/217

CPC classification number: H03F3/2173 ,  H03F2200/33 ,  H03F2200/534 ,  H03F2200/541

Abstract: Pour que le blocage et le déblocage de l'amplificateur soient effectués en synchronisme avec le signal d'entrée (Vrf) de l'amplificateur, il est proposé d'utiliser l'effet mémoire de l'impédance capacitive (C) des entrées de commande de chacun des deux transistors de blocage (Q1) du pont en H: en série avec chacune de ces entrées de commande, sont disposés, en parallèle, un premier interrupteur (K1,d1) et un élément semi-conducteur (d2), de telle façon que le blocage du transistor de blocage soit conditionné par l'ouverture du premier interrupteur (K1,d1) commandé par le signal de blocage (Va), et par le sens de la charge portée par ladite impédance capacitive (C); un second interrupteur (K2) commandé par les alternances du signal d'entrée (Vrf) n'autorise la fermeture du premier et donc le déblocage du transistor de blocage considéré (Q1) que pour les alternances que ce transistor de blocage n'amplifie pas.
Application aux dispositifs amplificateurs de puissance.

Abstract translation: 为了与放大器的输入信号（Vrf）同步地执行放大器的阻塞和解除阻塞，建议使用每个的控制输入的电容性阻抗（C）的存储效应 H桥的两个阻断晶体管（Q1）：与每个控制输入串联，第一开关（K1，d1）和半导体元件（d2）以这样的方式排列，使得阻塞 通过由阻塞信号（Va）排序的第一开关（K1，d1）的断开以及由所述电容性阻抗（C）承载的电荷的方向来调节晶体管; 通过输入信号（Vrf）的交替控制的第二开关（K2）允许第一开关闭合，因此所讨论的阻塞晶体管（Q1）的解除阻塞仅用于该阻塞晶体管不放大的交替。 应用于功率放大器的设备。

公开(公告)号：EP0524772A2

公开(公告)日：1993-01-27

申请号：EP92306534.6

申请日：1992-07-16

Applicant: Matra Marconi Space UK Limited

Inventor： Tondryk, Wieslaw Jan

IPC: H03F1/02 ,  H03F1/32 ,  H03F3/19 ,  H03G1/04 ,  H03G3/20

CPC classification number: H03F3/19 ,  H03F1/0261 ,  H03F1/302 ,  H03F2200/222 ,  H03F2200/387 ,  H03F2200/42 ,  H03F2200/48 ,  H03F2200/534 ,  H03F2200/541 ,  H03F2200/75 ,  H03G1/04

Abstract: A microwave power amplifier having application in multiple beam phased antenna array systems and including biasing means connection to the base of a microwave transistor and responsive to radio frequency signals applied to the amplifier to automatically adjust the transistor bias level to maintain constant amplifier gain. The biasing means includes two voltage regulators (1,2) with their outputs capacitively coupled via a fixed resistor (4) of value determined by the characteristics of the transistor, the base of the transistor being connected to the biasing means at the junction of the resistor and the capacitive coupling of one of the regulators. The mode of operation of the power amplifier gives rise to a highly efficient linear system while under effective Class B (non-linear) bias.

Abstract translation: 一种微波功率放大器，其应用于多波束相控天线阵列系统，并且包括连接到微波晶体管的基极的偏置装置，并响应于施加到放大器的射频信号来自动调节晶体管偏置电平以保持恒定的放大器增益。 偏置装置包括两个电压调节器（1,2），其输出通过由晶体管的特性确定的值的固定电阻器（4）电容耦合，晶体管的基极连接到偏置装置 电阻和其中一个稳压器的电容耦合。 在有效的B类（非线性）偏置的情况下，功率放大器的工作模式产生高效的线性系统。