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1. 发明公开

EP1060563A4 METHOD AND APPARATUS FOR COMPENSATING FOR DELAYS IN MODULATOR LOOPS 审中-公开
标题翻译：方法及装置延迟补偿IN调制器磨
公开(公告)号：EP1060563A4
公开(公告)日：2008-12-31
申请号：EP99905754
申请日：1999-02-05
申请人： TRIPATH TECHNOLOGY INC
发明人： DELANO CARY L , TRIPATHI ADYA S
IPC分类号： H03K7/00 , H03K7/08 , H01Q11/12 , H02M7/5395 , H03C1/06 , H03F1/02 , H03F3/217 , H04B1/04 , 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.

2. 发明授权

EP0441110B1 A method of compensating for non-linearities in an end amplifier incorporated in a radio transmitter 失效
标题翻译：一种用于在无线电发射机的功率放大器的非线性的补偿方法。
公开(公告)号：EP0441110B1
公开(公告)日：1995-11-02
申请号：EP90850404.6
申请日：1990-12-13
申请人： TELEFONAKTIEBOLAGET L M ERICSSON
发明人： Ekelund, Björn Olof Peter , Jonsson, Lars Anders
IPC分类号： H03F1/32
CPC分类号： H04L25/03834 , H03C1/06 , H03F1/3241 , H04L27/2071

3. 发明授权

EP0441579B1 Circuit for reducing distortion produced by an r.f. power amplifier 失效
标题翻译：一种用于在高频功率放大器减少失真的电路装置。
公开(公告)号：EP0441579B1
公开(公告)日：1995-04-26
申请号：EP91300897.5
申请日：1991-02-04
申请人： GEC-MARCONI LIMITED
发明人： McGann, Melvyn
IPC分类号： H03C1/06 , H03F3/24
CPC分类号： H03F1/3282 , H03C1/06 , H03F1/3247 , H03F2201/3231

4. 发明公开

EP0639306A1 METHOD AND APPARATUS FOR AMPLIFYING, MODULATING AND DEMODULATING 失效转让
标题翻译：用于放大，调制和解调方法和设备。
公开(公告)号：EP0639306A1
公开(公告)日：1995-02-22
申请号：EP93911931.0
申请日：1993-05-10
申请人： BRITISH TECHNOLOGY GROUP LIMITED
发明人： BATEMAN, Andrew Roseacre Crowe Hill , CHAN, Kam, Yuen
IPC分类号： H03C3 , H03C1 , H03F1 , H04L27
CPC分类号： H03F1/0294 , H03C1/06

5. 发明公开

EP0588444A1 Modulation system capable of accurately compensating for nonlinearities of an amplifier connected thereto 失效
标题翻译：，是能够补偿相关联的放大器准确调制装置的非线性。
公开(公告)号：EP0588444A1
公开(公告)日：1994-03-23
申请号：EP93203126.3
申请日：1990-01-05
申请人： NEC CORPORATION
发明人： Nagata, Yoshinori, c/o NEC Corporation
IPC分类号： H04L27/36 , H03F1/32 , H04B1/62 , H03C5/00
CPC分类号： H04L27/368 , H03C1/06 , H03C1/50 , H03C3/02 , H03C3/08 , H03C3/406 , H03C5/00 , H03C2200/0058 , H03C2200/0079 , H03D1/2245 , H03D7/168 , H03F1/3247 , H03F1/3282 , H03F1/3294 , H03F2201/3233
摘要： A modulation system responsive to a sampled signal (31) of a sampling rate for supplying a modulated analog signal to an amplifier having nonlinearities to make the amplifier produce an amplified output signal, in which a processing arrangement (36) processes the signal with reference to a difference between the signal and an additional digital signal (35) to compensate for the nonlinearities to produce a processed signal. The processed signal is modulated into the modulated analog signal. The amplified output signal is demodulated and converted into the additional digital signal by a converter (40). Otherwise, the second control signal is produced. A controller (78) may control a phase of a sampling signal supplied to the converter so that a quotient of the difference by a differential of the selected signal becomes equal to zero.
摘要翻译：响应于采样速率为在放大器供给的经调制的模拟信号，以具有非线性，使在放大的输出信号的放大器产生，其中处理装置（36），参照处理该信号到一个采样信号（31）的调制系统的信号之间，并附加数字信号（35）的差来补偿非线性以产生经处理的信号。处理后的信号被调制成调制的模拟信号。放大后的输出信号进行解调并通过一个转换器（40）转换成附加的数字信号。否则，该第二控制信号产生。控制器（78）可以控制提供给转换器的采样信号的相位所以没有由所选择的信号的差分的差的商变为等于零。

6. 发明公开

EP0441580A3 Circuit for reducing distortion produced by an r.f. power amplifier 失效
标题翻译：减少由R.F.生产的电路的电路功率放大器
公开(公告)号：EP0441580A3
公开(公告)日：1993-06-02
申请号：EP91300899.1
申请日：1991-02-04
申请人： GEC-MARCONI LIMITED
发明人： McGann, Melvyn
IPC分类号： H04B1/04 , H03C1/06 , H03F1/32 , H03G3/20
CPC分类号： H03G3/3042 , H03C1/06 , H03F1/3247 , H03F1/3288 , H03F1/34 , H03F3/24 , H03F2200/102 , H04B2001/0433
摘要： A high frequency SSB radio transmitter has an envelope amplitude modulator 3 for varying the envelope of an r.f. signal source based on an error signal from envelope detectors 5, 6 detecting the envelope of the input and output waveform. A signal derived from the error signal controls an amplitude modulator 10 in a subsidiary feedback loop to maintain the size of the envelopes detected by detectors 5 and 6 the same, in order that difference amplifier 7 may operate effectively. Rapid discrepancies between the detected envelopes 5 and 6 occurring within an envelope can then be corrected by amplitude modulator 3.

7. 发明公开

EP0271703A2 Amplitudenmodulierter Rundfunksender 失效
标题翻译：调幅广播发射机。
公开(公告)号：EP0271703A2
公开(公告)日：1988-06-22
申请号：EP87116364.8
申请日：1987-11-06
申请人： BBC Brown Boveri AG
发明人： Kyrian, Bohumil , Tschol, Wilhelm
IPC分类号： H03C1/06
CPC分类号： H03C1/06
摘要： Bei einem AM-Rundfunksender mit einem Schaltverstärker als Hauptmodulator (12) wird zum Erreichen einer stetigen 100 %igen Modulation in den Modulationstälern im Hochfrequenzkreis ein Zusatzmodulator (18) eingesetzt, mit dessen Hilfe in den Modulationstälern auch das Trägersignal moduliert wird. Das zur Steuerung des Zusatzmodulators (18) benötigte NF-Signal durchläuft eine Verzögerungsschaltung (16) und eine Korrekturschaltung (17).
摘要翻译：在具有开关放大器作为实现调制的稳定100％的主调制器（12）的AM广播发射机，一个附加调制器（18）被插入在所述高频电路中的调制谷进行调制的调制谷也载波信号的帮助。用于控制所述调制器（18）的添加剂需要NF-信号通过一个延迟电路（16）和一个校正电路（17）。

8. 发明公开

EP0835549A1 METHODS AND APPARATUS FOR MODULATING, DEMODULATING AND AMPLIFYING 失效
标题翻译：方法和装置MODULATE，解调和放大
公开(公告)号：EP0835549A1
公开(公告)日：1998-04-15
申请号：EP96919905.0
申请日：1996-05-28
申请人： BRITISH TECHNOLOGY GROUP LIMITED
发明人： BATEMAN, Andrew , CHAN, Kam, Yuen
IPC分类号： H03D3 , H03C1 , H03C3 , H03F1 , H04L27
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, Δx = the difference between the x component of the input signal and the corresponding Cartesian component of the processed output signal, and (Δy) = the difference between the y component of the input signal and the corresponding Cartesian component of the processed output signal.

9. 发明授权

EP0588444B1 Modulation system capable of accurately compensating for nonlinearities of an amplifier connected thereto 失效
标题翻译：，是能够补偿相关联的放大器准确调制装置的非线性
公开(公告)号：EP0588444B1
公开(公告)日：1998-04-01
申请号：EP93203126.3
申请日：1990-01-05
申请人： NEC CORPORATION
发明人： Nagata, Yoshinori, c/o NEC Corporation
IPC分类号： H04L27/36 , H03F1/32 , H04B1/62 , H03C5/00
CPC分类号： H04L27/368 , H03C1/06 , H03C1/50 , H03C3/02 , H03C3/08 , H03C3/406 , H03C5/00 , H03C2200/0058 , H03C2200/0079 , H03D1/2245 , H03D7/168 , H03F1/3247 , H03F1/3282 , H03F1/3294 , H03F2201/3233

10. 发明公开

EP0803147A1 TRANSMITTER COMPRISING CARRIER SUPPRESSION AND DC OFFSET REDUCTION MEANS 失效
标题翻译：与载波抑制和直流电压偏移减少意味着STATION
公开(公告)号：EP0803147A1
公开(公告)日：1997-10-29
申请号：EP96932784.0
申请日：1996-10-22
申请人： PHILIPS ELECTRONICS N.V.
发明人： WILSON, John, F.
IPC分类号： H03M1 , H03C1 , H03C3 , H04B1 , H04L27
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.

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