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1. 发明公开

EP0306249A3 Frequency synthesizer 失效
标题翻译：频率合成器
公开(公告)号：EP0306249A3
公开(公告)日：1990-03-28
申请号：EP88307977.4
申请日：1988-08-26
申请人： MARCONI INSTRUMENTS LIMITED
发明人： Wells, John Norman
IPC分类号： H03L7/20
CPC分类号： H03L7/20
摘要： A low-noise frequency synthesizer comprises a low-noise oscillator, such as a crystal oscillator (1), a multiplier (2), a divider (3) and a phase-locked loop (4 - 8) and is adapted to provide an output signal which is a combination of the multiplied and divided frequency. Thus, a large number of frequencies are available as an output in small increments determined by the division ratio of the divider.
摘要翻译：低噪声频率合成器包括诸如晶体振荡器（1），乘法器（2），分频器（3）和锁相环（4-8）之类的低噪声振荡器，并且适于提供输出信号，它是倍频和分频的组合。因此，大量的频率可用作分频器分频比确定的小增量输出。

2. 发明公开

EP0283160A3 Phase comparators 失效
标题翻译：相位比较器
公开(公告)号：EP0283160A3
公开(公告)日：1990-03-07
申请号：EP88301723.8
申请日：1988-02-29
申请人： MARCONI INSTRUMENTS LIMITED
发明人： Wells, John Norman , Thomas, Neil Edwin
IPC分类号： H03D13/00
CPC分类号： H03D13/004
摘要： A phase comparator accepts two streams of digital pulses, one being a reference signal and the other a test signal, and generates an output signal indicative of the phase difference. The phase comparator can be implemented as a four-state device or higher, and thus exhibits a wide phase capture range, i.e. multiples of 360°, and can provide a stable, predictable and linear output signal when the two input signals are in lock. It is therefore very suitable by use in a phase locked loop in which temporary wide variations in phase can occur.

3. 发明授权

EP0423941B1 Variable frequency signal generator 失效
标题翻译：发电机的可变频率信号
公开(公告)号：EP0423941B1
公开(公告)日：1997-11-26
申请号：EP90310223.4
申请日：1990-09-19
申请人： MARCONI INSTRUMENTS LIMITED
发明人： Owen, David Paul , Wells, John Norman
IPC分类号： H03C3/09 , H03B23/00
CPC分类号： H03C3/0991 , H03B23/00 , H03B2200/0092 , H03C3/06 , H03C3/0925 , H03C3/0933 , H03C3/0941 , H03C3/095 , H03C2200/0029 , H03C2200/005 , H03C2200/0079

4. 发明公开

EP0423941A3 Variable frequency signal generator 失效
标题翻译：可变频率信号发生器
公开(公告)号：EP0423941A3
公开(公告)日：1991-05-29
申请号：EP90310223.4
申请日：1990-09-19
申请人： MARCONI INSTRUMENTS LIMITED
发明人： Owen, David Paul , Wells, John Norman
IPC分类号： H03C3/09 , H03B23/00
CPC分类号： H03C3/0991 , H03B23/00 , H03B2200/0092 , H03C3/06 , H03C3/0925 , H03C3/0933 , H03C3/0941 , H03C3/095 , H03C2200/0029 , H03C2200/005 , H03C2200/0079
摘要： A variable frequency signal generator includes a phase locked loop having a variable frequency oscillator (1) which has a control port to which a frequency determining signal is applied, the output of the oscillator being fed via a frequency divider (6) to a phase sensitive detector (7) where it is compared with a reference frequency signal, the result of said comparison being arranged to generate a comparison signal which is fed to a loop filter (9) which is coupled to said control port; and the signal generator including means for applying a frequency control signal thereto comprising a first path being arranged to adjust the division ratio of the frequency divider (6), and a second path including means for combining said frequency control signal and said comparison signal to produce said frequency determining signal; and calibration means (11-14) for adjusting the relative characteristics of said first and second paths to compensate for effects arising from tuning sensitivity dependence on frequency of said variable frequency generator (1).

5. 发明公开

EP0423941A2 Variable frequency signal generator 失效
标题翻译：发电机mit variablem Frequenzsignal。
公开(公告)号：EP0423941A2
公开(公告)日：1991-04-24
申请号：EP90310223.4
申请日：1990-09-19
申请人： MARCONI INSTRUMENTS LIMITED
发明人： Owen, David Paul , Wells, John Norman
IPC分类号： H03C3/09 , H03B23/00
CPC分类号： H03C3/0991 , H03B23/00 , H03B2200/0092 , H03C3/06 , H03C3/0925 , H03C3/0933 , H03C3/0941 , H03C3/095 , H03C2200/0029 , H03C2200/005 , H03C2200/0079
摘要： A variable frequency signal generator includes a phase locked loop having a variable frequency oscillator (1) which has a control port to which a frequency determining signal is applied, the output of the oscillator being fed via a frequency divider (6) to a phase sensitive detector (7) where it is compared with a reference frequency signal, the result of said comparison being arranged to generate a comparison signal which is fed to a loop filter (9) which is coupled to said control port; and the signal generator including means for applying a frequency control signal thereto comprising a first path being arranged to adjust the division ratio of the frequency divider (6), and a second path including means for combining said frequency control signal and said comparison signal to produce said frequency determining signal; and calibration means (11-14) for adjusting the relative characteristics of said first and second paths to compensate for effects arising from tuning sensitivity dependence on frequency of said variable frequency generator (1).
摘要翻译：可变频率信号发生器包括具有可变频率振荡器（1）的锁相环，该可变频率振荡器（1）具有施加频率确定信号的控制端口，振荡器的输出经由分频器（6）馈送到相位敏感检测器（7），其中与参考频率信号进行比较，所述比较的结果被布置为产生馈送到耦合到所述控制端口的环路滤波器（9）的比较信号; 并且所述信号发生器包括用于施加频率控制信号的装置，包括布置成调整分频器（6）的分频比的第一路径，以及包括用于组合所述频率控制信号和所述比较信号的装置的第二路径，所述频率确定信号; 以及用于调节所述第一和第二路径的相对特性的校准装置（11-14），以补偿由所述可变频率发生器（1）的频率的调谐灵敏度所引起的影响。

6. 发明授权

EP0125790B2 Frequency synthesisers 有权
标题翻译：频率合成器
公开(公告)号：EP0125790B2
公开(公告)日：1995-07-05
申请号：EP84302477.9
申请日：1984-04-11
申请人： MARCONI INSTRUMENTS LIMITED
发明人： Wells, John Norman
IPC分类号： H03L7/18
CPC分类号： H03L7/1976

7. 发明公开

EP0283160A2 Phase comparators 失效
标题翻译： Phasenvergleicher。
公开(公告)号：EP0283160A2
公开(公告)日：1988-09-21
申请号：EP88301723.8
申请日：1988-02-29
申请人： MARCONI INSTRUMENTS LIMITED
发明人： Wells, John Norman , Thomas, Neil Edwin
IPC分类号： H03D13/00
CPC分类号： H03D13/004
摘要： A phase comparator accepts two streams of digital pulses, one being a reference signal and the other a test signal, and generates an output signal indicative of the phase difference. The phase comparator can be implemented as a four-state device or higher, and thus exhibits a wide phase capture range, i.e. multiples of 360°, and can provide a stable, predictable and linear output signal when the two input signals are in lock. It is therefore very suitable by use in a phase locked loop in which temporary wide variations in phase can occur.
摘要翻译：相位比较器接受两个数字脉冲流，一个是参考信号，另一个是测试信号，并产生指示相位差的输出信号。相位比较器可以被实现为四态器件或更高级，因此表现出宽的相位捕获范围，即360度的倍数，并且当两个输入信号被锁定时，可以提供稳定的，可预测的和线性的输出信号。因此，在锁相环中使用相位可能发生临时宽的变化是非常合适的。

8. 发明授权

EP0125790B1 Frequency synthesisers 有权
标题翻译：频率合成器
公开(公告)号：EP0125790B1
公开(公告)日：1989-06-21
申请号：EP84302477.9
申请日：1984-04-11
申请人： MARCONI INSTRUMENTS LIMITED
发明人： Wells, John Norman
IPC分类号： H03L7/18
CPC分类号： H03L7/1976

9. 发明公开

EP0306249A2 Frequency synthesizer 失效
标题翻译： Frequenzsynthesierer。
公开(公告)号：EP0306249A2
公开(公告)日：1989-03-08
申请号：EP88307977.4
申请日：1988-08-26
申请人： MARCONI INSTRUMENTS LIMITED
发明人： Wells, John Norman
IPC分类号： H03L7/20
CPC分类号： H03L7/20
摘要： A low-noise frequency synthesizer comprises a low-noise oscillator, such as a crystal oscillator (1), a multiplier (2), a divider (3) and a phase-locked loop (4 - 8) and is adapted to provide an output signal which is a combination of the multiplied and divided frequency. Thus, a large number of frequencies are available as an output in small increments determined by the division ratio of the divider.
摘要翻译：低噪声频率合成器包括诸如晶体振荡器（1），乘法器（2），分频器（3）和锁相环（4-8）之类的低噪声振荡器，并且适于提供输出信号，其是乘法和分频的组合。因此，大量的频率可以以分频器的分频比确定的小增量作为输出。

10. 发明公开

EP0125790A3 Frequency synthesisers 有权
标题翻译：频率合成器
公开(公告)号：EP0125790A3
公开(公告)日：1986-02-19
申请号：EP84302477
申请日：1984-04-11
申请人： MARCONI INSTRUMENTS LIMITED
发明人： Wells, John Norman
IPC分类号： H03L07/18
CPC分类号： H03L7/1976
摘要： A frequency synthesiser produces a variable frequency output using a controllable oscillator and a variable frequency divider which form part of a phase locked loop. The integer division ratio of the divider can be altered during a division cycleto simulate a fractional divisor value. The phase noise or jitter which is caused by the step change in divisor value is removed by altering the divisor value in accordance with the terms of a plurality of sequences, each of which sums to zero and which represents successive rows in a Pascal's triangle. A cascaded sequence of accumulators is used to determine the starting instants of each sequence, and the length of each sequence is dependent on the number of delay lines used. Although only four accumulators are illustrated, more can be added to give any desired degree of phase noise cancellation.

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