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1. 发明授权

EP1374421B1 INTERFERENCE REDUCTION FOR DIRECT CONVERSION RECEIVERS 有权
标题翻译：干扰减少直接转换接收器
公开(公告)号：EP1374421B1
公开(公告)日：2014-11-05
申请号：EP02757817.8
申请日：2002-03-25
申请人： Skyworks Solutions, Inc.
发明人： HATCHER, Geoffrey , MOLNAR, Alyosha, C. , MAGOON, Rahul
IPC分类号： H04B1/30 , H03D7/14 , H03D3/00
CPC分类号： H04B1/30 , H03D7/1433 , H03D7/1458 , H03D2200/0047 , H03D2200/009

2. 发明公开

EP2393207A2 Portable computing device with a sawless transceiver 审中-公开
标题翻译： Tragbare Rechnervorrichtung mit einem Sende-Empfangsgerätohne AOW
公开(公告)号：EP2393207A2
公开(公告)日：2011-12-07
申请号：EP11003819.7
申请日：2011-05-10
申请人： Broadcom Corporation
发明人： Rofougaran, Ahmadreza , Darabi, Hooman
IPC分类号： H04B1/10 , H04B1/40 , H03D7/00
CPC分类号： H04B1/109 , H03D7/1433 , H03D7/1441 , H03D7/1458 , H03D7/1466 , H03D7/1483 , H03D7/165 , H03D2200/0025 , H03D2200/0084 , H03D2200/0088 , H03D2200/009 , H04B1/40
摘要： A portable computing device includes an FEM, a SAW-less receiver, a SAW-less transmitter, and a baseband processing unit. The FEM isolates one or more outbound RF signals from one or more inbound RF signals. The SAW-less receiver converts the one or more inbound RF signals into one or more inbound intermediate frequency (IF) signals by frequency translating a baseband filter response to an IF filter response and/or an RF filter response. The SAW-less receiver filters the inbound RF signal(s) in accordance with the RF filter response and/or filters the inbound IF signal(s) in accordance with the IF filter response. The SAW-less receiver then converts the inbound IF signal(s) into inbound symbol stream(s). The SAW-less transmitter converts outbound symbol stream(s) into the outbound RF signal(s). The baseband processing unit converts outbound data into the outbound symbol stream(s) and convert the inbound symbol stream(s) into inbound data.
摘要翻译：便携式计算设备包括FEM，无SAW接收器，无SAW发射器和基带处理单元。 FEM从一个或多个入站RF信号隔离一个或多个出站RF信号。无SAW接收机通过将基带滤波器响应频率转换为IF滤波器响应和/或RF滤波器响应来将一个或多个入站RF信号转换成一个或多个入站中频（IF）信号。无SAW接收机根据RF滤波器响应对入站RF信号进行滤波和/或根据IF滤波器响应对入站IF信号进行滤波。然后，无SAW接收器将入站IF信号转换成入站符号流。无SAW发射器将出站符号流转换为出站RF信号。基带处理单元将出站数据转换为出站符号流，并将入站符号流转换为入站数据。

3. 发明公开

EP2281339A2 PASSIVE MIXER AND FOUR-PHASE CLOCKING METHOD AND APPARATUS 审中-公开
标题翻译：无源混频器和四相时钟方法及装置
公开(公告)号：EP2281339A2
公开(公告)日：2011-02-09
申请号：EP09734164.8
申请日：2009-04-21
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： MU, Fenghao , TILLMAN, Fredrik
IPC分类号： H03D7/14 , H03D7/16
CPC分类号： H03D7/166 , H03D7/1441 , H03D7/1458 , H03D7/1466 , H03D7/163 , H03D7/165 , H03D2200/0043 , H03D2200/0084 , H03D2200/0088 , H03D2200/009
摘要： According to one embodiment, a radio frequency receiver includes a quadrature mixer for converting radio frequency signals to baseband signals or intermediate frequency signals. The quadrature mixer includes an in-phase passive mixer and a quadrature-phase passive mixer. Each passive mixer includes a mixer core having a plurality of mixer input switch transistors and a plurality of output switch transistors connected to the mixer input switch transistors. Clock circuitry generates a first set of clock signals and a second set of clock signals. The first set of clock signals has a frequency twice that of the second set of clock signals. The first set of clock signals is arranged to drive the mixer input switch transistors and the second set of clock signals is arranged to drive the output switch transistors.
摘要翻译：根据一个实施例，射频接收器包括用于将射频信号转换为基带信号或中频信号的正交混频器。正交混频器包括一个同相无源混频器和一个正交相无源混频器。每个无源混频器包括具有多个混频器输入开关晶体管的混频器核心以及连接到混频器输入开关晶体管的多个输出开关晶体管。时钟电路产生第一组时钟信号和第二组时钟信号。第一组时钟信号的频率是第二组时钟信号的两倍。第一组时钟信号被设置为驱动混频器输入开关晶体管，并且第二组时钟信号被设置为驱动输出开关晶体管。

4. 发明公开

EP2215718A1 LOCAL OSCILLATOR BUFFER AND MIXER HAVING ADJUSTABLE SIZE 审中-公开
标题翻译： LOKALER OSZILLATORPUFFER UND MISCHER MIT EINSTELLBARERGRÖSSE
公开(公告)号：EP2215718A1
公开(公告)日：2010-08-11
申请号：EP08845349.3
申请日：2008-09-12
申请人： QUALCOMM Incorporated
发明人： SAHOTA, Gurkanwal, Singh , BOSSU, Frederic , CHOKSI, Ojas, M.
IPC分类号： H03G3/30 , H03D7/16 , H03D7/14
CPC分类号： H03D7/1441 , H03D7/165 , H03D7/166 , H03D2200/0084 , H03D2200/009
摘要： Selectable sizes for a local oscillator (LO) buffer and mixer are disclosed. In an embodiment, LO buffer and/or mixer size may be increased when a receiver operates in a high gain mode, while LO buffer and/or mixer size may be decreased when the receiver operates in a low gain mode. In an embodiment, LO buffer and mixer sizes are increased and decreased in lock step. Circuit topologies and control schemes for specific embodiments of LO buffers and mixers having adjustable size are disclosed.
摘要翻译：公开了本地振荡器（LO）缓冲器和混频器的可选尺寸。在一个实施例中，当接收机以高增益模式操作时，可以增加LO缓冲器和/或混频器大小，而当接收器以低增益模式操作时，可以减小LO缓冲器和/或混频器大小。在一个实施例中，LO缓冲器和混合器尺寸在锁定步骤中增加和减小。公开了具有可调节尺寸的LO缓冲器和混合器的具体实施例的电路拓扑和控制方案。

5. 发明公开

EP2095518A1 METHOD AND APPARATUS FOR RECEIVING RADIO FREQUENCY SIGNALS 有权
标题翻译：方法和装置接收射频信号
公开(公告)号：EP2095518A1
公开(公告)日：2009-09-02
申请号：EP07820874.1
申请日：2007-10-03
申请人： Telefonaktiebolaget LM Ericsson (publ) , Nilsson, Magnus
发明人： MU, Fenghao , MÅRTENSSON, Andreas
IPC分类号： H04B1/18 , H03D7/14
CPC分类号： H04B1/18 , H03D7/1441 , H03D7/1458 , H03D7/1466 , H03D7/1483 , H03D7/165 , H03D7/166 , H03D2200/0023 , H03D2200/0025 , H03D2200/0043 , H03D2200/0088 , H03D2200/009
摘要： A frequency conversion receiver comprises a passive mixer, a Low-Noise Amplifier (LNA) and a balun. The low-noise amplifier generates an amplified single-ended signal responsive to a single-ended receiver input signal. The passive mixer generates a mixer output signal responsive to a differential mixer input signal and a four-phase local oscillator signal. The balun transforms the amplified singled-ended signal into the differential mixer input signal, the balun having a first winding coupled to an output of the low-noise amplifier and a second winding coupled to an input of the passive mixer, the second winding having more turns than the first winding. The turn ratio of the second winding to the first winding provides gain compensation to the low-noise amplifier, and in conjunction with the low-noise amplifier and the passive mixer, provides a desired gain to the receiver and linearity over a dynamic range of the receiver input signal.

6. 发明授权

EP1487123B1 DIRECT CONVERSION RECEIVER 有权
标题翻译：直接执行接收机
公开(公告)号：EP1487123B1
公开(公告)日：2009-06-17
申请号：EP02720579.8
申请日：2002-04-23
申请人： FUJITSU LIMITED
发明人： TANAKA, Sachiko, c/o FUJITSU LIMITED
IPC分类号： H04B1/30 , H03D1/22 , H04L27/00 , H03D3/00
CPC分类号： H04B1/30 , H03D2200/0047 , H03D2200/009
摘要： A direct conversion receiver comprising an adding means disposed on the input side of receiving RF signal of a mixer, means for shifting a branched signal before being inputted to the mixer, and a variable gain amplifying means disposed on the post-stage of branch and on the prestage or post-stage of the phase shift means, wherein DC offset generated from direct conversion can be removed by imparting a signal phase shifted and amplified by the variable gain amplifying means to the adding means and adverse effect of transient response can be prevented when DC offset is varied.

7. 发明公开

EP1735905A1 HARMONIC SUPPRESION MIXER AND TUNER 有权
标题翻译：混频器和调谐器谐波抑制
公开(公告)号：EP1735905A1
公开(公告)日：2006-12-27
申请号：EP05725330.4
申请日：2005-03-11
申请人： R.F. Magic Inc.
发明人： SHAH, Peter
IPC分类号： H03D7/14
CPC分类号： H03D7/145 , H03D7/14 , H03D7/1433 , H03D7/1441 , H03D7/1483 , H03D7/165 , H03D2200/0025 , H03D2200/0033 , H03D2200/0086 , H03D2200/009 , H04B1/28
摘要： A harmonic suppression mixer for down converting an RF signal to a complex I and Q baseband signal that uses a plurality of switching mixers each with a gain stage to produce a sinusoidal weighted sum of the mixer outputs. Odd harmonics output by each switching mixer is suppressed in the composite signal. A low skew local oscillator (LO) clock generator creates multiple LO phases and drives the mixers. The mixer can be used in low noise direct conversion RF tuners. The mixer is configurable by programming gain stage coefficient values to achieve a variable number of effective mixers used in combination. At low tuning frequencies, all available mixers are programmed with unique coefficients and driven by different LO clock phases to achieve maximum harmonic suppression. At high tuning frequencies, some mixers are paralleled and duplicate coefficients are programmed or mixers are disabled to reduce the number of effective mixers.

8. 发明授权

EP1424770B1 Balanced sub-harmonic mixer 有权
标题翻译：亚谐平衡混频器
公开(公告)号：EP1424770B1
公开(公告)日：2006-07-05
申请号：EP03255905.6
申请日：2003-09-20
申请人： NORTHROP GRUMMAN CORPORATION
发明人： Katz, Richard H.
IPC分类号： H03D7/14
CPC分类号： H04B1/30 , H03D9/0633 , H03D2200/009

9. 发明公开

EP1487123A4 DIRECT CONVERSION RECEIVER 有权
标题翻译：直接执行接收机
公开(公告)号：EP1487123A4
公开(公告)日：2005-07-06
申请号：EP02720579
申请日：2002-04-23
申请人： FUJITSU LTD
发明人： TANAKA SACHIKO
IPC分类号： H03D3/00 , H04B1/30 , H03D1/22 , H04L27/00
CPC分类号： H04B1/30 , H03D2200/0047 , H03D2200/009
摘要： A direct conversion receiver comprising an adding means disposed on the input side of receiving RF signal of a mixer, means for shifting a branched signal before being inputted to the mixer, and a variable gain amplifying means disposed on the post-stage of branch and on the prestage or post-stage of the phase shift means, wherein DC offset generated from direct conversion can be removed by imparting a signal phase shifted and amplified by the variable gain amplifying means to the adding means and adverse effect of transient response can be prevented when DC offset is varied.

10. 发明公开

EP1490963A2 QUADRATURE SWITCHING MIXER WITH REDUCED LEAKAGE 审中-公开
标题翻译：与泄漏电流降低磨边混频器电路
公开(公告)号：EP1490963A2
公开(公告)日：2004-12-29
申请号：EP03720410.4
申请日：2003-04-03
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： BJÖRK, Christian , MATTISSON, Sven , WIKLUND, Magnus
IPC分类号： H03D7/14
CPC分类号： H03D7/1441 , H03D7/1433 , H03D7/1458 , H03D7/1483 , H03D7/165 , H03D2200/009
摘要： A quadrature switching mixer is provided for mixing a received RF signal and a local oscillator signal, while rejecting an image signal associated with the RF signal. Input signal components in quadrature, that is, I and Q input components derived from the received RF signal, are respectively coupled through first and second input paths to corresponding commuting switches in a configuration of switches. Each of the switches operates to multiply respective quadrature components of RF and local oscillator signals to provide quadrature output signal components. A unidirectional device, such as a buffer amplifier included in a signal splitter, is placed in each input path to prevent any portion of an output signal component from leaking backward through one of the input paths to the other input path, and thus to the other output signal component.

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