公开(公告)号：JPS61121531A

公开(公告)日：1986-06-09

申请号：JP24279084

申请日：1984-11-16

Applicant: Advantest Corp

Inventor： KURIHARA TAKENORI

IPC: H03L7/197 ,  H03L7/18

Abstract: PURPOSE: To set small frequency steps over a wide range by supplying the output of a variable frequency oscillator to the 1st PLL circuit after dividing it, supplying the output of the PLL circuit to the 2nd PLL circuit after multiplying it and extracting the output of the 2nd PLL circuit.
CONSTITUTION: The output signal of the variable frequency oscillator 16 which produces frequencies of 220∼420MHz, for example, in a step of one Hz is divided by a frequency variable divider 17 and then mixed with the output signal of a reference oscillator 20 through a mixer 21 and a BPF 33 for the extraction of a sum or a difference signal. This output signal is multiplied by a multiplier 23 and mixed with the output signal of a CVO 30 through a mixer 24. The signal obtained by dividing 27 of the sum or difference between said both output signals is compared with the signal sent from a fixed frequency oscillator 25 through a phase comparator 26. Then the output signal corresponding to the phase difference is supplied through an adder 29 as the control signal of the VCO 30. Thus a PLL 32 is formed. An n-multiplied signal in the higher harmonic wave delivered from the multiplier 23 is delivered through a terminal 15 by the signal supplied to the adder 29 through a terminal 28.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：通过将可变频率振荡器的输出分配给第一个PLL电路，在宽范围内设置小频率步长，将PLL电路的输出与第二个PLL电路相乘后，将其输出提取出来 第二个PLL电路。 构成：例如以1Hz的步长产生频率为220-420MHz的可变频率振荡器16的输出信号由频率可变分频器17分频，然后与基准振荡器20的输出信号通过 混合器21和用于提取和或差信号的BPF 33。 该输出信号乘以乘法器23并通过混频器24与CVO 30的输出信号混合。将通过将所述两个输出信号之间的和或差的除以27获得的信号与从固定频率发送的信号进行比较 振荡器25通过相位比较器26.然后，通过作为VCO30的控制信号的加法器29提供对应于相位差的输出信号。因此形成PLL 32。 从乘法器23传送的高次谐波中的n倍信号通过端子28通过端子28输送到加法器29的信号。

公开(公告)号：JPS6189563A

公开(公告)日：1986-05-07

申请号：JP21209084

申请日：1984-10-08

Applicant: Advantest Corp

Inventor： KURIHARA TAKENORI ,  NUKUI YOSHIHIRO ,  KUME DANJI

IPC: G01R23/173 ,  G01R27/28

Abstract: PURPOSE: To make it possible to read both of the entire magnitude of a frequency spectrum having a large peak value and the magnitude of a frequency spectrum having a small level by one picture, by changing over the gain of an IF amplifier in the upper and lower sides of the frequence spectrum.
CONSTITUTION: When a detection output component reached a predetermined level, the gain of an IF amplifier is changed over. For example, when a frequency spectrum is displayed, the gain of the IF amplifier is changed over in the upper and lower sides of the frequency spectrum and, at the time of a side desired to be observed in an enlarged state, the gain of the IF amplifier is set to 'large'. In a side wanting to observe the whole of a frequency spectrum having a large peak value, the gain of the IF amplifier is throttled small. Therefore, a necessary part is enlarged on the display surface of CRT and the whole of the frequency spectrum can be also displayed.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：通过改变上部的IF放大器的增益，可以读取具有较大峰值的频谱的整个幅度和具有小电平的频谱的幅度两幅图像， 频谱的下侧。 构成：当检测输出分量达到预定电平时，IF放大器的增益被切换。 例如，当显示频谱时，IF放大器的增益在频谱的上侧和下侧被切换，并且在希望在放大状态下观察的一侧的时候，增益 IF放大器设置为“大”。 在想要观察整个具有大峰值的频谱的方面，IF放大器的增益被减小。 因此，在CRT的显示面上放大必要部分，也可以显示整个频谱。

公开(公告)号：JPS6120406A

公开(公告)日：1986-01-29

申请号：JP14167684

申请日：1984-07-09

Applicant: Advantest Corp

Inventor： KURIHARA TAKENORI

IPC: H03C1/12

Abstract: PURPOSE: To eliminate a nonlinear distortion, and to offer a high frequency amplitude modulator having a wide dynamic range by cascade-connecting a lowpass type amplitude modulator and a high-pass type amplitude modulator, and modulating the amplitude of a carrier wave through both these amplitude modulators.
CONSTITUTION: A low-pass type amplitude modulator LP and a high-pass type amplitude modulator HP have a structure which has used variable capacitors VC
1 ∼VC
4 and VC
5 ∼VC
9 as variable impedance elements. Accordingly, a lowpass characteristic curve A
1 is varied in the direction A
2 , and the modulator HP can vary a high-pass characteristic curve B
1 in the direction B
2 . This variation quantity is proportional to a voltage applied to the variable capacitors VC
1 ∼ VC
9 . Accordingly, by applying a modulating signal Sm to the variable VC
1 ∼VC
9 from a modulating signal source M, each filter characteristic can be varied simultaneously in accordance with the voltage of the modulating signal Sm. In this case, by giving in advance a carrier was SR of a frequency f
0 from a carrier wave signal source RF, this carrier wave SR can be subjected to amplitude modulation.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：为了消除非线性失真，并通过级联连接低通型幅度调制器和高通型幅度调制器来提供具有宽动态范围的高频幅度调制器，并通过这两个调制器调制载波的振幅 振幅调制器。 构成：低通型幅度调制器LP和高通型幅度调制器HP具有使用可变电容器VC1-VC4和VC5-VC9作为可变阻抗元件的结构。 因此，低通特性曲线A1在方向A2上变化，并且调制器HP可以沿B2方向改变高通特性曲线B1。 该变化量与施加到可变电容器VC1- VC9的电压成比例。 因此，通过从调制信号源M向变量VC1-VC9施加调制信号Sm，可以根据调制信号Sm的电压同时改变每个滤波器特性。 在这种情况下，通过预先赋予载波作为来自载波信号源RF的频率f0的SR，可以对该载波SR进行振幅调制。

公开(公告)号：JPS5726904A

公开(公告)日：1982-02-13

申请号：JP10201480

申请日：1980-07-24

Applicant: Advantest Corp

Inventor： KURIHARA TAKENORI

IPC: H03L7/18 ,  H03B21/00 ,  H03B21/02

CPC classification number: H03B21/02

Abstract: PURPOSE:To change a high frequency in a small frequency interval, by providing three variable frequency signal generators which make frequency-convert the output of a voltage controlled oscillator sequentially and decrease the frequency. CONSTITUTION:The output from a voltage controlled oscillator 11 is frequency- converted with the output of the 1st variable frequency signal generator 21 in which the frequency is changed in a comparatively large interval. The output reduced for the frequency at the 1st frequency converter 19 is frequency-converted with the output of the 2nd variable frequency signal generator 23 in which the frequency can be changed in smaller interval then that of the 1st generator. The output of the 2nd frequency converter 22 is compared 24 for the phase with the output of the 3rd variable frequency signal generator 25 having a further smaller frequency interval. The output of the phase comparator 24 is added with a DC output from a frequency setter 27 at an adder 26 and the result is applied to the voltage controlled oscillator as a control signal.

Abstract translation: 目的：通过提供三个可变频率信号发生器，可以顺序转换压控振荡器的输出并降低频率，从而在较小的频率间隔内改变高频。 构成：通过第一可变频率信号发生器21的输出频率转换来自压控振荡器11的输出，其频率以较大的间隔改变。 第1变频器19的频率降低的输出用第2可变频率信号发生器23的输出进行频率变换，第2变频信号发生器23的频率可以以较小的间隔改变为第1发生器的频率。 第二频率转换器22的输出与第二变频器22的输出与具有更小频率间隔的第三可变频率信号发生器25的输出相比较。 相位比较器24的输出在加法器26处加上来自频率设定器27的DC输出，结果作为控制信号施加到压控振荡器。