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31 条记录 (耗时 0.014 秒)

    PASSIVE SWITCHED-CAPACITOR FILTERS CONFORMING TO POWER CONSTRAINT
    1.
    发明公开
    PASSIVE SWITCHED-CAPACITOR FILTERS CONFORMING TO POWER CONSTRAINT 审中-公开
    此类PSC-滤波器的功率限制（PSC无源开关电容器）

    公开(公告)号：EP2394362A1

    公开(公告)日：2011-12-14

    申请号：EP10704045.3

    申请日：2010-02-03

    申请人： Qualcomm Incorporated

    发明人： PAN, Chengzhi ,  BURKE, Joseph

    IPC分类号： H03H15/02

    CPC分类号： H03H17/0248 ,  H03H15/023 ,  H03H19/004 ,  H03H2007/0192

    摘要： Passive switched-capacitor (PSC) filters are described herein. In one design, a PSC filter implements a second-order infinite impulse response (IIR) filter with two complex first-order IIR sections. Each complex first-order IIR section includes three sets of capacitors. A first set of capacitors receives a real input signal and an imaginary delayed signal, stores and shares electrical charges, and provides a real filtered signal. A second set of capacitors receives an imaginary input signal and a real delayed signal, stores and shares electrical charges, and provides an imaginary filtered signal. A third set of capacitors receives the real and imaginary filtered signals, stores and shares electrical charges, and provides the real and imaginary delayed signals. In another design, a PSC filter implements a finite impulse response (FIR) section and an IIR section for a complex first-order IIR section. The IIR section includes multiple complex filter sections operating in an interleaved manner.

    Polyphase filters in silicon integrated circuit technology
    4.
    发明公开
    Polyphase filters in silicon integrated circuit technology 有权
    多晶硅过滤器Siliziumschaltkreis-Technologie

    公开(公告)号：EP1154569A2

    公开(公告)日：2001-11-14

    申请号：EP01302805.5

    申请日：2001-03-27

    申请人： NOKIA MOBILE PHONES LTD.

    发明人： Christensen, Kaare

    IPC分类号： H03H7/21

    CPC分类号： H03H7/21 ,  H03H11/22 ,  H03H2007/0192 ,  H03H2011/0494

    摘要： An IQ generator is integrated into an IC for generating IQ output signal. The IQ generator includes a signal generator providing input with two identical signals opposed in phase, a filter comprises a plurality capacitances and inductances, and output providing the I and Q signals. The capacitances and inductances of the filter are integrated into said integrated circuit.

    摘要翻译： 智能发生器集成在一个IC中，用于产生IQ输出信号。 IQ发生器包括一个信号发生器，为输入提供相位相反的两个相同的信号，滤波器包括多个电容和电感，输出提供I和Q信号。 滤波器的电容和电感被集成到所述集成电路中。

    QUASI RESONANT TYPE COMPOUND RESONANT CIRCUIT
    5.
    发明公开
    QUASI RESONANT TYPE COMPOUND RESONANT CIRCUIT 审中-公开
    QUASIRESONANTE ZUSAMMUSTRETZTE RESONANZSCHALTUNG

    公开(公告)号：EP2418771A1

    公开(公告)日：2012-02-15

    申请号：EP10774756.0

    申请日：2010-02-03

    申请人： Marcdevices Co., Ltd.

    发明人： HIRAMA, Koichi

    IPC分类号： H03H5/02

    CPC分类号： H03H7/21 ,  H03H2007/0192

    摘要： A composite resonance circuit is provided of which the resonance frequency is variable over a wide frequency range without changing the circuit constant of a non-resonant element having no resonance frequency. The composite resonance circuit comprises an input terminal; a resonance unit having first and second ports and quasi-resonating in response to AC signals respectively supplied to these ports; and phase shift circuits that perform different phase shifts on an AC signal supplied to the input terminal and supply first and second shifted signals subjected to the phase shift respectively to the first and second ports. The resonance unit is an impedance circuit that has at least four input terminals forming the first and second ports and that generates a quasi-resonant peak current under non-zero reactance in response to the first and second shifted signals coming in via the first and second ports. The quasi-resonant peak current is variable according to the frequency and phase shift quantities of the AC signals. Namely, the resonance frequency can be made to be variable.

    摘要翻译： 提供了一种复合谐振电路，其谐振频率在宽频率范围内可变，而不改变不具有共振频率的非谐振元件的电路常数。 复合谐振电路包括输入端; 谐振单元，具有第一和第二端口，并且响应于分别提供给这些端口的AC信号而准谐振; 以及相移电路，其对提供给输入端的AC信号执行不同的相移，并将经过相移的第一和第二移位信号分别提供给第一和第二端口。 谐振单元是阻抗电路，其具有形成第一和第二端口的至少四个输入端子，并且响应于经由第一和第二端口进入的第一和第二移位信号，在非零电抗下产生准谐振峰值电流 端口。 准谐振峰值电流根据交流信号的频率和相移量而变化。 也就是说，谐振频率可以变化。

    VECTOR SYNTHESIS TYPE PHASE SHIFTER, OPTICAL TRANSCEIVER, AND CONTROL CIRCUIT
    6.
    发明公开
    VECTOR SYNTHESIS TYPE PHASE SHIFTER, OPTICAL TRANSCEIVER, AND CONTROL CIRCUIT 有权
    VEKTORSYNTHESE-PHASENVERSCHIEBER，OPTISCHES SENDE- /EMPFANGSGERÄTUND STEERERSCHALTUNGDAFÜR

    公开(公告)号：EP2326002A1

    公开(公告)日：2011-05-25

    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 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152

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

    摘要： A vector sum phase shifter includes a 90° phase shifter (1) which generates an in-phase signal (VINI) and a quadrature signal (VINQ) from an input signal (VIN), a four-quadrant multiplier (2I) which changes the amplitude of the in-phase signal (VINI) based on a control signal (CI), a four-quadrant multiplier (2Q) which changes the amplitude of the quadrature signal (VINQ) based on a control signal (CQ), a combiner (3) which combines the in-phase signal (VINI) and the quadrature signal (VINQ), and a control circuit (4). The control circuit (4) includes a voltage generator which generates a reference voltage, and a differential amplifier which outputs the difference signal between a control voltage (VC) and the reference voltage as the control signal (CI, CQ). The differential amplifier performs an analog operation of converting the control voltage (VC) into the control signal (CI, CQ) similar to a sine wave or a cosine wave.

    摘要翻译： 矢量和移相器包括从输入信号（VIN）产生同相信号（VINI）和正交信号（VINQ）的90°移相器（1），四象限乘法器（2I），其改变 基于控制信号（CI）的同相信号（VINI）的幅度，基于控制信号（CQ）改变正交信号（VINQ）的振幅的四象限乘法器（2Q），组合器 3），其组合了同相信号（VINI）和正交信号（VINQ），以及控制电路（4）。 控制电路（4）包括产生参考电压的电压发生器和输出控制电压（VC）和参考电压之间的差分信号作为控制信号（CI，CQ）的差分放大器。 差分放大器执行将控制电压（VC）转换成与正弦波或余弦波相似的控制信号（CI，CQ）的模拟操作。

    REGENERATIVE DIVIDER FOR UP AND DOWN CONVERSION OF RADIO FREQUENCY (RF) SIGNALS
    7.
    发明公开
    REGENERATIVE DIVIDER FOR UP AND DOWN CONVERSION OF RADIO FREQUENCY (RF) SIGNALS 有权
    下变频射频（RF）信号的

    公开(公告)号：EP1590886A1

    公开(公告)日：2005-11-02

    申请号：EP04700660.6

    申请日：2004-01-08

    申请人： Sirific Wireless Corporation

    发明人： DOSANJH, Sathwant ,  KUNG, William ,  MANKU, Tajinder

    IPC分类号： H03D7/16 ,  H03B21/01 ,  H04B1/30 ,  H04B1/26

    CPC分类号： H03B21/01 ,  H03D3/007 ,  H03H7/21 ,  H03H2007/0192 ,  H04B1/26 ,  H04B1/30

    摘要： The present invention relates generally to communications, and more specifically to a method and apparatus for generating local oscillator signals used for up- and down-conversion of RF (radio frequency) signals. A major problem in the design of modulators and demodulators, if the leakage of local oscillator (LO) signals into the received signal path. The invention presents a number of highly integratable circuits which resolve the LO leakage problem, using regenerative divider circuits acting on oscillator signals which are running at a multiple or fraction of the frequency of the desired LO signal, to generate in-phase (I) and quadrature (Q) mixing signals. Embodiments of these circuits also use harmonic subtraction and polyphase mixers, as well as virtual local oscillator TM (VLO) mixing signals. VLO mixing signals are signal pairs which emulate local oscillator signals by means of complementary mono-tonal and multi-tonal mixing signals.

    RECEIVER AND FILTER ARRANGEMENT COMPRISING POLYPHASE FILTERS
    8.
    发明公开
    RECEIVER AND FILTER ARRANGEMENT COMPRISING POLYPHASE FILTERS 失效
    与多相接收器和过滤器装置，

    公开(公告)号：EP0909481A2

    公开(公告)日：1999-04-21

    申请号：EP98903255.0

    申请日：1998-03-05

    申请人： Koninklijke Philips Electronics N.V.

    发明人： STIKVOORT, Eduard, Ferdinand

    IPC分类号： H03D7 ,  H03H7 ,  H03H11

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

    摘要： In a receiver (2) the input signal is converted by a mixer (4) into two quadrature IF signals. The quadrature IF signals are amplified by an amplifier (12) and filtered by a filter (14). A polyphase filter (16) suppresses signals having frequencies above a predetermined frequency. A second mixer (15) converts the filtered IF signal into a second IF signal. This second IF signal is filtered by a second polyphase filter (19) which suppresses signals having a frequency below a predetermined frequency. In this way a band-pass transfer function is obtained having a first edge defined by the first polyphase filter (16) and having the second defined by the second polyphase filter (19). In an embodiment of the invention, the cut off frequencies of the polyphase filters (14 and 19) are equal to zero, resulting in a transfer function for the complete receiver having cut off frequencies independent from the component values used in the polyphase filters.

    An improved correlator circuit for a six-port receiver
    9.
    发明公开
    An improved correlator circuit for a six-port receiver 失效
    Verbesserte Korrelatorschaltungfüreine Sechs-Tor-Schaltung

    公开(公告)号：EP0841756A2

    公开(公告)日：1998-05-13

    申请号：EP97308945.1

    申请日：1997-11-07

    申请人： NOKIA MOBILE PHONES LTD.

    发明人： Hyyrylainen, Jari ,  Ylamurto, Tommi

    IPC分类号： H04B1/30 ,  G01R25/02

    CPC分类号： H04B1/30 ,  H03D3/007 ,  H03H7/21 ,  H03H2007/0192

    摘要： A correlator circuit for a six port receiver wherein the received signal is summed with a local oscillator signal at various phase angles and wherein the phase rotation between the local oscillator and RF signals is carried out separately from the summing of the correlator outputs.

    摘要翻译： 一种用于六端口接收器的相关器电路，其中接收信号与各种相位角的本地振荡器信号相加，并且其中本地振荡器和RF信号之间的相位旋转与相关器输出的相加分开执行。