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1. 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

2. 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.

3. 发明授权

EP0441580B1 Circuit for reducing distortion produced by an r.f. power amplifier 失效
标题翻译：电路用于减少高频功率放大器的失真
公开(公告)号：EP0441580B1
公开(公告)日：1996-09-18
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

4. 发明授权

EP0312261B1 Linearity adjusting circuit 失效
标题翻译：电路的线性控制。
公开(公告)号：EP0312261B1
公开(公告)日：1994-03-23
申请号：EP88309357.7
申请日：1988-10-07
申请人： GEC-MARCONI LIMITED
发明人： McGann, Melvyn
IPC分类号： H04N5/20
CPC分类号： H04N5/38 , H04N5/20

5. 发明公开

EP0441579A1 Circuit for reducing distortion produced by an r.f. power amplifier 失效
标题翻译： Schaltungsanordnung zur Verringerung der Verzerrungen bei einem Hochfrequenz-Leistungsverstärker。
公开(公告)号：EP0441579A1
公开(公告)日：1991-08-14
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
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 detecting the envelope of the input and output waveform. It also has a phase modulator (4) in a main feedback loop for varying the phase of the input waveform based on differences detected in phase detector (10) between the instantaneous phase of the input and output r.f. signal. To overcome the problem of spurious outputs from phase detector (10) resulting from the cross-over points of the SSB waveform when there are carrier breaks and other problems, a subsidiary, phase lock loop (12) feeds a signal derived from the error signal to phase modulator (13) to tend to hold the input A, B in such a phase relationship that the output is zero. To cope with large phase shift errors between input waveform and output resulting from when the power amplifier changes frequency or temperature variations e.g. at the antenna, a broadband phase shifting network (17) is brought into operation when a dual voltage comparator (19) senses that the signal fed to modulator (13) passes a value corresponding to its extremes of adjustment.
摘要翻译：高频SSB无线电发射机具有用于改变r.f的包络的包络幅度调制器（3）。信号源基于来自包络检测器的误差信号，检测输入和输出波形的包络。它还具有主反馈回路中的相位调制器（4），用于根据输入和输出r.f的瞬时相位在相位检测器（10）中检测到的差异来改变输入波形的相位。信号。为了克服当存在载波中断和其他问题时由SSB波形的交叉点产生的来自相位检测器（10）的寄生输出的问题，辅助锁相环（12）馈送从误差信号导出的信号到相位调制器（13）倾向于将输入A，B保持为输出为零的相位关系。为了应对由功率放大器改变频率或温度变化而导致的输入波形和输出之间的大的相移误差。在天线处，当双电压比较器（19）感测到馈送到调制器（13）的信号通过与其极限调整值相对应的值时，宽带相移网络（17）被运行。

6. 发明公开

EP0312261A3 Linearity adjusting circuit 失效
标题翻译：线性调整电路
公开(公告)号：EP0312261A3
公开(公告)日：1991-02-27
申请号：EP88309357.7
申请日：1988-10-07
申请人： GEC-MARCONI LIMITED
发明人： McGann, Melvyn
IPC分类号： H04N5/20
CPC分类号： H04N5/38 , H04N5/20
摘要： A linearity correction circuit for television transmission operates at intermediate frequency to introduce appropriate pre-distortion into the amplitude envelope to compensate for non-linearity in the power amplifier stages. An array of parallel current sources (11), each of which is independently adjustable in response to the perceived requirement for pre-distortion over a corresponding amplitude band, to inject a current sufficient to introduce an appropriate differential voltage at the output. The circuit provides for the independent correction of each amplitude band, so that it is capable of operation under microprocessor control in real time.

7. 发明公开

EP0312261A2 Linearity adjusting circuit 失效
标题翻译： Schaltung zurLinearitätsregelung。
公开(公告)号：EP0312261A2
公开(公告)日：1989-04-19
申请号：EP88309357.7
申请日：1988-10-07
申请人： GEC-MARCONI LIMITED
发明人： McGann, Melvyn
IPC分类号： H04N5/20
CPC分类号： H04N5/38 , H04N5/20
摘要： A linearity correction circuit for television transmission operates at intermediate frequency to introduce appropriate pre-distortion into the amplitude envelope to compensate for non-linearity in the power amplifier stages. An array of parallel current sources (11), each of which is independently adjustable in response to the perceived requirement for pre-distortion over a corresponding amplitude band, to inject a current sufficient to introduce an appropriate differential voltage at the output. The circuit provides for the independent correction of each amplitude band, so that it is capable of operation under microprocessor control in real time.
摘要翻译：用于电视传输的线性校正电路以中频操作，以将适当的预失真引入到幅度包络中以补偿功率放大器级中的非线性。一组平行电流源（11），每个并联电流源（11）响应于对相应幅度带上的预失真的感知需求而独立地可调节以注入足以在输出端引入适当的差分电压的电流。该电路提供对每个幅度带的独立校正，使其能够在微处理器控制下实时操作。

8. 发明公开

EP0441580A2 Circuit for reducing distortion produced by an r.f. power amplifier 失效
标题翻译： Schaltung zur Verringerung der Verzerrungen einesHochfrequenzleistungsverstärkers。
公开(公告)号：EP0441580A2
公开(公告)日：1991-08-14
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.
摘要翻译：高频SSB无线电发射机具有一个包络振幅调制器3，用于改变一个r.f的包络。信号源基于来自包络检测器5,6的误差信号，检测输入和输出波形的包络。它还具有相位调制器4，用于根据在相位检测器10中在输入和输出r.f的瞬时相位之间检测到的差异来改变输入波形的相位。信号。从误差信号导出的信号控制辅助反馈回路中的幅度调制器10，以保持由检测器5和6检测到的包络的尺寸相同，以便差分放大器7可以有效地操作。然后可以通过幅度调制器3来校正在包络内发生的检测到的信封5和6之间的快速差异

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