专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO01067596A1 RF COMMUNICATION SYSTEM USING AN RF DIGITAL AMPLIFIER 审中-公开
标题翻译：使用RF数字放大器的RF通信系统
公开(公告)号：WO01067596A1
公开(公告)日：2001-09-13
申请号：PCT/US2001/006780
申请日：2001-03-01
IPC分类号： H03C1/06 , H03C3/08 , H03F3/217 , H03K17/16 , H03K17/687
CPC分类号： H03F3/2173 , H03C1/06 , H03C3/08 , H03F3/2171 , H03F2200/294 , H03K17/163 , H03K17/6871
摘要： Band pass amplifiers and methods for driving the same are described. According to one embodiment, a frequency selective network (102) is provided in a feedback loop (112). An analog-to-digital converter (104) is coupled to the frequency selective network. A switching stage (108, 110) is coupled to the analog-to-digital converter for producing a continuous-time output signal. The switching stage includes at least one resonance circuit configured to resonate at a resonance frequency and thereby generate at least a portion of the continuous-time output signal. A continuous-time feedback path continuously senses and feeds back the continuous-time output signal to the frequency selective network.
摘要翻译：描述了带通放大器及其驱动方法。根据一个实施例，在反馈回路（112）中提供频率选择网络（102）。模数转换器（104）耦合到频率选择网络。开关级（108,110）被耦合到模拟 - 数字转换器，用于产生连续时间输出信号。开关级包括至少一个谐振电路，其被配置为以谐振频率谐振，从而产生连续时间输出信号的至少一部分。连续时间反馈路径连续地感测并将连续时间输出信号反馈到频率选择网络。

2. 发明申请

WO99040680A1 METHOD AND APPARATUS FOR COMPENSATING FOR DELAYS IN MODULATOR LOOPS 审中-公开
标题翻译：用于补偿调制器机架中延迟的方法和装置
公开(公告)号：WO99040680A1
公开(公告)日：1999-08-12
申请号：PCT/US1999/002458
申请日：1999-02-05
IPC分类号： H03K7/08 , H03C1/06 , H03F3/217 , H04B1/04 , H03K7/00 , H01Q11/12 , H03F1/02 , H04B1/10
CPC分类号： H03F3/217 , H03C1/06 , H03K7/08 , H03M3/37 , H03M3/432
摘要： A modulator loop (700) designed to operate in a frequency range of interest is described. The loop (704) includes a loop output terminal and a switching stage, the output of which is coupled to the loop output terminal. The switching stage (704) has a first delay associated therewith. The output of a modulator stage is coupled to the input of the switching stage. A first feedback path is coupled between the loop output terminal and the feedback input of the modulator stage. A feedback filter is coupled between the output of the modulator stage and the feedback input of the modulator stage which compensates for the first delay. The feedback filter (708) is operable to transmit frequencies outside the frequency range of interest and attenuate frequencies in the frequency range of interest.
摘要翻译：描述了被设计为在感兴趣的频率范围内操作的调制器环路（700）。环路（704）包括环路输出端子和开关级，其输出端耦合到环路输出端子。切换级（704）具有与其相关联的第一延迟。调制器级的输出耦合到开关级的输入端。第一反馈路径耦合在环路输出端子和调制器级的反馈输入端之间。反馈滤波器耦合在调制器级的输出和补偿第一延迟的调制器级的反馈输入之间。反馈滤波器（708）可操作以在感兴趣的频率范围之外传输频率并衰减感兴趣的频率范围内的频率。

3. 发明申请

WO2005060596A3 A TRANSMITTER FOR MODULATION DISTORTION COMPENSATION 审中-公开
标题翻译：一种用于调制失真补偿的发送器
公开(公告)号：WO2005060596A3
公开(公告)日：2007-01-25
申请号：PCT/US2004040927
申请日：2004-12-07
申请人： MOTOROLA INC , NAGODE THOMAS D , NANNI PETER , NIGRA LOUIS M , BLACK GREG R , TILLEY KEITH ANDREW
发明人： NAGODE THOMAS D , NANNI PETER , NIGRA LOUIS M , BLACK GREG R , TILLEY KEITH ANDREW
IPC分类号： H04B1/04 , H03C1/06 , H03C3/09 , H03F1/32
CPC分类号： H04B1/04 , H03C1/06 , H03C3/0975 , H03F1/3223 , H03F1/34 , H03F3/24 , H03F2200/102 , H03F2200/105 , H03F2201/3221 , H03F2201/3227 , H04B2001/0416 , H04B2001/0433 , H04B2001/0441
摘要： A transmitter circuit (200, 400, 510) includes a power control error data generator (230), a feedforward predistortion data generation (240), feedforward adder logic (250) and the amplifier (210).
摘要翻译：发射机电路（200,400,510）包括功率控制误差数据生成器（230），前馈预失真数据生成（240），前馈加法器逻辑（250）和放大器（210）。

4. 发明申请

WO2006017202A1 SYSTEM AND METHOD FOR CURRENT-MODE AMPLITUDE MODULATION 审中-公开
标题翻译：用于电流模式振幅调制的系统和方法
公开(公告)号：WO2006017202A1
公开(公告)日：2006-02-16
申请号：PCT/US2005/024406
申请日：2005-07-11
申请人： ERICSSON INC. , PEHLKE, David R. , HADJICHRISTOS, Aristotele
发明人： PEHLKE, David R. , HADJICHRISTOS, Aristotele
IPC分类号： H03C1/06
CPC分类号： H03C1/06 , H03C5/00 , H03F1/02 , H03F1/0222 , H03F1/0261 , H03F1/32 , H03F3/24 , H03F2200/324 , H03F2200/456 , H03F2200/504 , H04B1/04 , H04B1/0483 , H04B2001/045 , H04B2001/0491
摘要： An amplifier circuit includes a power amplifier biased for saturated mode operation, and a controllable current source to provide supply current to the power amplifier. The controllable current source effects desired amplitude modulation of the output signal from the power amplifier by modulating the supply current it provides responsive to an amplitude information signal. In one or more embodiments, the current source includes a circuit that is configured to adjust one or more transmitter operating parameters responsive to detecting changes in the effective DC resistance of the power amplifier. For example, the circuit may generate a compensation signal that reduces the effective DC resistance responsive to detecting that the effective DC resistance has undesirably increased. By way of non-limiting examples, such compensation may be effected by changing a current mirror, an amplifier-to-antenna impedance matching, an amplifier bias or device size, or imposing some form of transmit signal back-off.
摘要翻译：放大器电路包括偏置用于饱和模式操作的功率放大器和可控电流源，以向功率放大器提供电源电流。可控电流源通过调制其响应于幅度信息信号提供的电源电流来影响来自功率放大器的输出信号的期望幅度调制。在一个或多个实施例中，电流源包括被配置为响应于检测功率放大器的有效直流电阻的变化来调整一个或多个发射器操作参数的电路。例如，电路可以响应于检测到有效DC电阻不期望地增加而产生降低有效DC电阻的补偿信号。作为非限制性示例，可以通过改变电流镜，放大器到天线阻抗匹配，放大器偏置或器件尺寸或者施加某种形式的发射信号反馈来实现这种补偿。

5. 发明申请

WO1998013943A1 METHOD AND APPARATUS FOR DETECTING AND CANCELLING UNWANTED TRANSMITTER MODULATION 审中-公开
标题翻译：用于检测和取消未经授权的发射机调制的方法和装置
公开(公告)号：WO1998013943A1
公开(公告)日：1998-04-02
申请号：PCT/US1997016974
申请日：1997-09-24
申请人： ERICSSON INC.
发明人： ERICSSON INC. , JONES, Mark, A.
IPC分类号： H04B01/04
CPC分类号： H03G3/3036 , H03C1/06 , H03F1/34 , H03F3/24 , H04B1/0475 , H04B2001/0433
摘要： Unwanted transmitter modulation which would otherwise have an undesirable impact at a radio receiving the transmitted signal is detected and cancelled. The radio transmitter includes a phase-locked loop that receives an input signal and a feedback signal. An amplifier stage amplifies an output from the phase-locked loop, and an antenna transmits the amplified signal. A detector detects the transmitted signal and generates the feedback signal. Inclusion of the amplifier stage in the phase-locked loop compensates for undesirable transmitter modulation introduced at the amplifier stage. One example application of the present invention is to vehicular-based radio systems, where the radio transmitter is susceptible to the noise generated by the vehicle electrical system which ultimately results in an audible whine at the radio receiver. The whine heard at the receiver is greatly reduced/eliminated.
摘要翻译：检测并消除在接收发射信号的无线电处理不利影响的不期望的发射机调制。无线电发射机包括接收输入信号和反馈信号的锁相环。放大器级放大来自锁相环的输出，天线发射放大的信号。检测器检测发送的信号并产生反馈信号。在锁相环中包含放大器级补偿在放大器级引入的不期望的发射机调制。本发明的一个示例应用是基于车载无线电系统，其中无线电发射机易受车辆电气系统产生的噪声的影响，这最终导致在无线电接收机处发出可听见的声音。在接收机听到的呜声大大减少/消除。

6. 发明申请

WO1997015980A1 TRANSMITTER COMPRISING CARRIER SUPPRESSION AND DC OFFSET REDUCTION MEANS 审中-公开
标题翻译：包括载波抑制和直流偏移减少手段的发射机
公开(公告)号：WO1997015980A1
公开(公告)日：1997-05-01
申请号：PCT/IB1996001132
申请日：1996-10-22
申请人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB
发明人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB , WILSON, John, F.
IPC分类号： H03C01/52
CPC分类号： H04B1/403 , H03C1/06 , H03C1/52 , H03C3/406 , H04B1/30
摘要： A transmitter comprising at least first and second phase related signal paths (I, Q), having respective frequency up-converting means (28, 30, 32, 34), means (35) for combining the output of the respective frequency up-converting means and for supplying the combined signal to power amplifying means (36, 38). A feedback loop is provided which has a coupler (54) for deriving a portion of the power amplifier output signal and supplying it to first and second phase related feedback paths. Each of the feedback paths comprises frequency down-converting means (56, 58, 60). Means (42 to 52) are provided for measuring the dc offsets at the respective inputs of the frequency up-converting means (28, 30) when the feedback around the linearisation loop is reduced to zero without altering the dc offsets produced at the outputs of the frequency down-converting means (56, 58, 60). Subtracting means (20, 22, 68, 70) subtract the measured dc offsets from the feedback loop error signals.
摘要翻译：一种发射机，包括至少第一和第二相位相关信号路径（I，Q），具有相应的上变频装置（28,30,32,34），用于组合各个上变频的输出的装置（35）用于将组合信号提供给功率放大装置（36,38）。提供了一种反馈回路，其具有用于导出功率放大器输出信号的一部分并将其提供给第一和第二相位相关反馈路径的耦合器（54）。每个反馈路径包括频率下变频装置（56,58,60）。提供装置（42至52），用于当线性化环路周围的反馈减小到零时，用于测量上变频装置（28,30）的各个输入处的直流偏移，而不改变在输出端产生的直流偏移频率下变频装置（56,58,60）。减法装置（20,22,68,70）从反馈回路误差信号中减去所测量的直流偏移。

7. 发明申请

WO2008155121A2 VERFAHREN UND VORRICHTUNG ZUR ERZEUGUNG EINES AMPLITUDEN-MODULIERTEN SIGNALS 审中-公开
标题翻译：方法和装置产生被调制的信号幅度
公开(公告)号：WO2008155121A2
公开(公告)日：2008-12-24
申请号：PCT/EP2008/004952
申请日：2008-06-19
申请人： KATHREIN-AUSTRIA GES. M.B.H. , SCHÖNINGER, Bernd
发明人： SCHÖNINGER, Bernd
IPC分类号： H03C1/00
CPC分类号： H03C1/06 , H03C1/02 , H03K7/02
摘要： Ein verbessertes Verfahren zur Erzeugung eines amplitudenmodulierten Signals sowie eine zugehörige Vorrichtung zeichnet sich im Wesentlichen durch folgenden Merkmale aus oder eine verbesserte Vorrichtung zur Erzeugung eines amplituden-modulierten Signals umfasst folgende Merkmale: das Nutz- oder Informationssignal (1) wird aus einem digitalisierten Nutz- oder Informationssignal (101) erzeugt, welches in ein analoges Nutz- oder Informationssignal (1) gewandelt wird, für das Nutz- oder Informationssignal (1) wird anstelle eines Wunschsignals (1") ein korrigiertes analoges Nutz- oder Informationssignal (1k') verwendet, das gegenüber dem Wunschsignal (1") so verändert ist, dass Oberwellen, die bei Verwendung des Wunschsignals (1") außerhalb des Nutzbandes (3) oberhalb des Grenzwertes für die Signalgröße des modulierten Trägersignals liegen, bei Verwendung des korrigierten Nutz- oder Informationssignals (1k') im zulässigen Bereich unterhalb des Grenzwertes für die Signalgröße des modulierten Trägersignals liegen.
摘要翻译：用于产生调幅信号和相关联的设备的改进的方法的基本特征是由以下特征，或用于产生包括一个调幅信号的改进的装置，所述有用信号或信息信号（1）由数字化的有用的或生成信息信号（101），其被转换成模拟有用信号或信息信号（1）的有用信号或信息信号（1）是在处的期望信号（1“）的使用修正的模拟有用信号或信息信号（1K“），其与所希望的信号（1“）进行比较（位于有用频带之外被改变，使得使用所需信号1）时，其高次谐波”（3）上述用于使用经校正的有用信号或信息信号（经调制的载波信号的信号幅度的限制值 1K“）在容许范围低于该信号幅度d中的阈值有调制的载波信号。

8. 发明申请

WO2005060596B1 A TRANSMITTER FOR MODULATION DISTORTION COMPENSATION 审中-公开
标题翻译：用于调制失真补偿的变送器
公开(公告)号：WO2005060596B1
公开(公告)日：2007-04-05
申请号：PCT/US2004040927
申请日：2004-12-07
申请人： MOTOROLA INC , NAGODE THOMAS D , NANNI PETER , NIGRA LOUIS M , BLACK GREG R , TILLEY KEITH ANDREW
发明人： NAGODE THOMAS D , NANNI PETER , NIGRA LOUIS M , BLACK GREG R , TILLEY KEITH ANDREW
IPC分类号： H04B1/04 , H03C1/06 , H03C3/09 , H03F1/32
CPC分类号： H04B1/04 , H03C1/06 , H03C3/0975 , H03F1/3223 , H03F1/34 , H03F3/24 , H03F2200/102 , H03F2200/105 , H03F2201/3221 , H03F2201/3227 , H04B2001/0416 , H04B2001/0433 , H04B2001/0441
摘要： A transmitter circuit (200, 400, 510) includes a power control error data generator (230), a feedforward predistortion data generation (240), feedforward adder logic (250) and the amplifier (210).
摘要翻译：发射机电路（200,400,510）包括功率控制误差数据生成器（230），前馈预失真数据生成（240），前馈加法器逻辑（250）和放大器（210）。

9. 发明申请

WO1996037948A1 METHODS AND APPARATUS FOR MODULATING, DEMODULATING AND AMPLIFYING 审中-公开
标题翻译：调制，调制和放大的方法和装置
公开(公告)号：WO1996037948A1
公开(公告)日：1996-11-28
申请号：PCT/GB1996001259
申请日：1996-05-28
申请人： BRITISH TECHNOLOGY GROUP LIMITED , BATEMAN, Andrew , CHAN, Kam, Yuen
发明人： BRITISH TECHNOLOGY GROUP LIMITED
IPC分类号： H03C01/06
CPC分类号： H03C1/06 , H03F1/0294
摘要： The invention includes apparatus for processing an input signal to generate an output signal. The processing arrangement comprises first and second feedback loops for generating, from said input signal, respective output signal components. Each loop comprises a voltage controlled oscillator, having a frequency or phase which is variable in response to a control signal, for generating a loop output signal which forms one of the components of the output signal and a comparator for generating the control signal. There is also provided combining means for combining the loop output signals to derive a signal representative of the output signal. Means for providing first and second feedback loop operating signals, dependent on the output signal and in phase quadrature with one another are provided. In each loop, the feedback loop operating signal is applied to one input of the comparator and the other input of the comparator is coupled to receive a component of the input signal. Signal-stability means for continuously ensuring that the output signal is stable whatever the phase of the output signal relative to the input signal are provided. The signal-stability means and the comparators derive control signals v1 (I) and v2 (II) for the respective VCOs where k = the loop gain of the feedback loops, r = the amplitude of the input signal as represented by the components x and y, R = the amplitude of the output of the VCOs, DELTA x = the difference between the x component of the input signal and the corresponding Cartesian component of the processed output signal, and ( DELTA y) = the difference between the y component of the input signal and the corresponding Cartesian component of the processed output signal.
摘要翻译：本发明包括用于处理输入信号以产生输出信号的装置。处理装置包括用于从所述输入信号产生相应的输出信号分量的第一和第二反馈回路。每个回路包括压控振荡器，其具有响应于控制信号而变化的频率或相位，用于产生形成输出信号的分量之一的回路输出信号和用于产生控制信号的比较器。还提供了组合装置，用于组合环路输出信号以导出代表输出信号的信号。提供了依赖于输出信号和相位正交的第一和第二反馈回路操作信号的装置。在每个环路中，反馈环路操作信号被施加到比较器的一个输入端，并且比较器的另一个输入端被耦合以接收输入信号的分量。信号稳定性用于连续地确保输出信号稳定，无论输出信号相对于输入信号的相位如何。信号稳定装置和比较器导出各个VCO的控制信号v1（I）和v2（II），其中k =反馈环路的环路增益，r =由分量x表示的输入信号的幅度， y，R = VCO的输出的幅度，DELTA x =输入信号的x分量与处理后的输出信号的相应笛卡尔分量之间的差，和（DELTA y）= y分量的差分输入信号和处理的输出信号的相应笛卡尔分量。

10. 发明申请

WO1996009690A1 CIRCUIT FOR COMPENSATING THE EFFECTS OF CROSSTALK AT MIXER INPUTS 审中-公开
标题翻译：电路进行赔偿影响大约讲话在混频器输入
公开(公告)号：WO1996009690A1
公开(公告)日：1996-03-28
申请号：PCT/DE1995001238
申请日：1995-09-08
申请人： SICAN GESELLSCHAFT FÜR SILIZIUM-ANWENDUNGEN UND CAD/CAT NIEDERSACHSEN MBH , BEHRENT, Hermann
发明人： SICAN GESELLSCHAFT FÜR SILIZIUM-ANWENDUNGEN UND CAD/CAT NIEDERSACHSEN MBH
IPC分类号： H03C01/06
CPC分类号： H03C1/06
摘要： The invention concerns mixers which are used for frequency conversion in high-frequency communication apparatus. The object of the invention is to compensate useful signals which are picked up undesirably at the mixer converter inputs by a signal acting in the opposite direction so that the undesired linear and non-linear mixing products are attenuated at the outputs. The compensation according to the invention is brought about by two mutually phase-shifted input signals which have a substantial orthogonal signal component. The compensating system consists of a compensation circuit which can be integrated monolithically in order to suppress undesired linear and non-linear mixing products which occur as a result of the input signal being picked up at the converter input and interfere inseparably with the useful signal at the mixer output.
摘要翻译：本发明涉及一种混合器，其用于在RF通信设备的频率转换。本发明的目的是，所述转换器通过一个反向作用的信号，意味着混频器的转换，从而使不期望的线性和非线性混频产物在输出端被衰减，以补偿不希望的穿插有用信号。根据本发明的补偿是通过与具有相当大的正交信号分量的两个相互相位旋转的输入信号的补偿来实现的。它是用于抑制不希望的线性和非线性混合由输入信号到转换器的输入的干扰招致和不可分割的叠加在所述混频器输出的干扰对有用信号的产品单片集成的补偿电路。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式