公开(公告)号：EP1500192A1

公开(公告)日：2005-01-26

申请号：EP03706847.5

申请日：2003-03-20

申请人： Koninklijke Philips Electronics N.V.

发明人： STIKVOORT, Eduard,F.

IPC分类号： H03H11/22

CPC分类号： H03H11/22 ,  H03H2007/0192 ,  H03H2011/0494

摘要： Polyphase filters comprising filters each filter comprising passive elements. The filters are provided with integrators comprising amplifiers with admittance elements in feedback paths to create one or more other poles not situated on the negative imaginary axis in the plane pole-zero plot. A conductance element couples an output of an integrator to an input of a previous integrator for introducing a frequency shift for at least one pole in the plane pole-zero plot. A capacitor couples an output of an integrator to an input of a next integrator for improving the quality factor of the polyphase filter, which factor can then exceed . A signal inversion allows conductance elements to have negative values necessary for locating at least one pole at the most optimal location in the plane pole-zero plot.

公开(公告)号：EP0797292B1

公开(公告)日：2002-09-04

申请号：EP97200613.4

申请日：1997-03-03

申请人： Koninklijke Philips Electronics N.V.

发明人： Moore, Paul Anthony ,  Barnard, Michael Edwin

IPC分类号： H03D3/00

CPC分类号： H03H7/21 ,  H03D3/008 ,  H03D3/009 ,  H03H2007/0192 ,  H04B1/30

公开(公告)号：EP3228004B1

公开(公告)日：2018-09-05

申请号：EP14805922.3

申请日：2014-12-02

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： MU, Fenghao

IPC分类号： H03H7/21 ,  H03H7/01

CPC分类号： H04B7/0617 ,  H03H7/21 ,  H03H11/1291 ,  H03H11/22 ,  H03H21/0012 ,  H03H2007/0192 ,  H03H2011/0494 ,  H04L27/2631 ,  H04W72/046 ,  H04W88/08

摘要： A quadrature signal generator comprises a resistor-capacitor, RC, polyphase filter and an inductor compensation arrangement. The inductor compensation arrangement comprises a first inductor connected between the first and the third output terminals, and a second inductor connected between the second and fourth output terminals. The first and second inductors are arranged to compensate for a capacitive load on the output terminals when in use. A beamforming arrangement, a communication device and a base station are also disclosed.

公开(公告)号：EP2326002B1

公开(公告)日：2015-07-29

申请号：EP09808216.7

申请日：2009-08-12

申请人： Nippon Telegraph And Telephone Corporation

发明人： NOSAKA,Hideyuki ,  NAGATANI, Munehiko ,  YAMANAKA,Shogo ,  SANO,Kimikazu ,  MURATA,Koichi ,  ONODERA,Kiyomitsu ,  ENOKI,Takatomo

IPC分类号： H03H11/20 ,  H03H17/08 ,  H03H11/04 ,  H03H7/01 ,  H04B10/50

CPC分类号： H03H11/20 ,  H03H2007/0192 ,  H03H2011/0494 ,  H04B10/505 ,  H04B2210/517

公开(公告)号：EP2491651A1

公开(公告)日：2012-08-29

申请号：EP10779092.5

申请日：2010-10-19

申请人： Qualcomm Incorporated

发明人： SAVOJ, Jafar

IPC分类号： H03H7/21

CPC分类号： H03H7/21 ,  H03H2007/0192

摘要： An LR polyphase filter implemented with inductors and resistors and capable of operating at high frequencies is described. In one design, the LR polyphase filter includes first and second paths, with each path including an inductor coupled to a resistor. The first and second paths receive a first input signal and provide first and second output signals, respectively, which may be in quadrature. For a differential design, the polyphase filter further includes third and fourth paths, which receive a second input signal and provide third and fourth output signals, respectively. The four output signals may be 90° out of phase. The first and second input signals are for a differential input signal. The first and third output signals are for a first differential output signal, and the second and fourth output signals are for a second differential output signal. Each inductor may be implemented with a transmission line.

公开(公告)号：EP2421152A1

公开(公告)日：2012-02-22

申请号：EP10764303.3

申请日：2010-02-03

申请人： Marcdevices Co., Ltd.

发明人： HIRAMA, Koichi

IPC分类号： H03H11/04 ,  H03H7/12 ,  H03H11/20

CPC分类号： H03H7/12 ,  H03H7/175 ,  H03H7/1775 ,  H03H11/04 ,  H03H11/20 ,  H03H2007/0192 ,  H03H2011/0494

摘要： A composite resonance circuit is provided of which the resonance frequency range can be set with greater degrees of freedom with the peak frequency of the resonance characteristic curve of a resonance unit having good linearity and the resonance sharpness Q-factor being kept within a desired range. In the composite resonance circuit according to the present invention, first and second relay circuits are respectively connected between the resonance unit and first and second phase shift circuits that shift an input frequency signal by different phases. Hence, the resonance frequency range can be set by setting the gains and impedances of the first and second relay circuits according to its use, without changing resonance elements or the like of the resonance unit.

摘要翻译： 提供了一种复合谐振电路，其谐振频率范围可以以更高的自由度设置，谐振单元的谐振特性曲线的峰值频率具有良好的线性度，并且谐振锐度Q因子保持在期望的范围内。 在根据本发明的复合谐振电路中，第一和第二继电器电路分别连接在谐振单元与通过不同相位移位输入频率信号的第一和第二相移电路之间。 因此，可以通过根据其使用设置第一和第二继电器电路的增益和阻抗而不改变谐振单元的谐振元件等来设置谐振频率范围。

公开(公告)号：EP2038997A2

公开(公告)日：2009-03-25

申请号：EP07840385.4

申请日：2007-07-10

申请人： QUALCOMM Incorporated

发明人： ZHUO, Wei ,  HADJICHRISTOS, Aristotele ,  SAHOTA, Gurkanwal Kamal ,  PENG, Solti

IPC分类号： H03D7/16

CPC分类号： H03D7/166 ,  H03H19/008 ,  H03H2007/0192

摘要： A method according to one embodiment includes using a quadrature set of local oscillator signals having duty cycles of substantially less than fifty percent to perform a mixing operation on a radio-frequency current signal. Other embodiments include using a quadrature set of local oscillator signals having duty cycles of less than twenty-five percent.

摘要翻译： 根据一个实施例的方法包括使用占空比基本上小于百分之五十的本地振荡器信号的正交组来对射频电流信号执行混频操作。 其他实施例包括使用占空比小于百分之二十五的本地振荡器信号的正交组。

公开(公告)号：EP2037574A1

公开(公告)日：2009-03-18

申请号：EP07744847.0

申请日：2007-06-07

申请人： Hirama, Koichi

发明人： Hirama, Koichi

IPC分类号： H03H1/00 ,  H03H5/00 ,  H03H7/00

CPC分类号： H03H9/0028 ,  H03H5/00 ,  H03H9/0095 ,  H03H9/545 ,  H03H9/56 ,  H03H9/566 ,  H03H9/585 ,  H03H2007/013 ,  H03H2007/0192

摘要： [Problem]
To obtain a variable frequency source that produces high purity signals.
[Constitution]
A serial resonance circuit is prepared. The serial resonance circuit is configured of a pair of resonance elements serially connected to each other at a midpoint therebetween and exhibiting resonance frequencies equal to each other. To both ends of the serial resonance circuit, phase shift circuits that shift phases so that the phases are reverse to each other are connected. A resonance output obtained from the serial resonance circuit when AC power is supplied between the midpoint and an input side of the phase shift circuit is obtained as an external output.

摘要翻译： [问题]获得产生高纯度信号的可变频率源。 [结构]准备串联谐振电路。 串联谐振电路由一对谐振元件构成，它们之间的中点彼此串联连接并且呈现彼此相等的谐振频率。 串联谐振电路的两端连接相位相反的相移电路。 获得当在相移电路的中点和输入侧之间提供AC电力时从串联谐振电路获得的谐振输出作为外部输出。

公开(公告)号：EP0909481B1

公开(公告)日：2003-12-10

申请号：EP98903255.2

申请日：1998-03-05

申请人： Koninklijke Philips Electronics N.V.

发明人： STIKVOORT, Eduard, Ferdinand

IPC分类号： H03H11/04

CPC分类号： H03H7/06 ,  H03D7/166 ,  H03H7/21 ,  H03H2007/0192

公开(公告)号：EP1236285A2

公开(公告)日：2002-09-04

申请号：EP00983188.4

申请日：2000-11-29

申请人： TELEFONAKTIEBOLAGET LM ERICSSON

发明人： VAN ZEIJL, Paulus, Thomas, Maria

IPC分类号： H04B1/28 ,  H03H11/22

CPC分类号： H03B27/00 ,  H03D7/18 ,  H03H7/21 ,  H03H2007/0192

摘要： An image reject circuit comprises a local oscillator (26) for producing a local oscillator signal. A tunable phase shifting network (29) has inputs (1, 3) for receiving the local oscillator signal and producing an output in-phase (I) signal (13, 25) and an output quadrature (Q) signal (15, 27). A first amplitude detector (33) determines the amplitude of the output (I) signal, while a second amplitude detector (35) determines the amplitude of the output (Q) signal. A comparator (37) determines the difference between the amplitudes of the output (I) and (Q) signals, to produce a tuning signal for tuning the phase shifting network (29) to bring the difference between the amplitudes of the output (I) and (Q) signals towards a desired level. Preferably, the tunable phase shifting network (29) (shown in Figure 4) comprises a combination of tunable capacitive, resistive and inductive elements.