公开(公告)号：US6081163A

公开(公告)日：2000-06-27

申请号：US234979

申请日：1999-01-22

申请人： Hitoshi Ujiie ,  Kazuyuki Maruo

发明人： Hitoshi Ujiie ,  Kazuyuki Maruo

IPC分类号： G04G3/02 ,  G04G7/02 ,  H03L1/02 ,  H03L7/085 ,  H03L7/14 ,  H03L7/18 ,  H03L7/07

CPC分类号： G01S19/235 ,  G04G3/022 ,  G04R40/02 ,  G04R40/06 ,  H03L7/085 ,  H03L7/146 ,  H03L7/18 ,  H03L1/022

摘要： A frequency standard generator includes a voltage controlled crystal oscillator (VCXO) for generating high stability output signal, a radio wave receiver to receive a radio wave which includes a high accuracy reference time signal, a time interval measuring circuit which measures a phase difference between the reference time signal and the output signal of the VCXO; a frequency control processor which determines control data based on the phase difference data to phase lock the output signal of the VCXO to the reference time signal, a frequency deviation data generator for compiling the phase difference data to obtain frequency deviation trend data of the VCXO, and a compensation data generator for generating compensation data based on the frequency deviation trend data to compensate frequency changes in said VCXO when the reference time signal is unavailable.

摘要翻译： 频率标准发生器包括用于产生高稳定度输出信号的电压控制晶体振荡器（VCXO），用于接收包括高精度基准时间信号的无线电波的无线电波接收器，测量第二相位差之间的相位差的时间间隔测量电路 参考时间信号和VCXO的输出信号; 频率控制处理器，其基于相位差数据确定控制数据，以将VCXO的输出信号锁定到参考时间信号;频率偏差数据发生器，用于编译相位差数据以获得VCXO的频率偏差趋势数据; 以及补偿数据发生器，用于基于频率偏差趋势数据产生补偿数据，以补偿当基准时间信号不可用时所述VCXO中的频率变化。

公开(公告)号：US6078224A

公开(公告)日：2000-06-20

申请号：US135781

申请日：1998-08-18

申请人： Hitoshi Ujiie

发明人： Hitoshi Ujiie

IPC分类号： H03L7/06 ,  H03L7/085

CPC分类号： G04R40/02 ,  G04R40/06 ,  H03L7/085

摘要： A frequency standard generator for generating a high accuracy reference frequency by synchronizing a high accuracy atomic frequency standard or equivalent thereof and minimizing a phase difference between the generated reference frequency and the received atomic frequency standard. The frequency standard generator includes a voltage controlled crystal oscillator (VCXO) for generating high stability output signal to be used as a standard frequency signal, a radio wave receiver which receives a radio wave and reproduces a time signal to be used as a reference for the VCXO, a time interval measuring circuit which measures a phase difference between the time signal and the output signal of the VCXO and generates data indicating the phase difference, a frequency control processor which produces control data to control the frequency of the VCXO such that the phase difference maintains a constant value through an operation of a phase lock loop, a phase controller which initiates a phase control operation for reducing the phase difference for a predetermined period of time, and a D/A converter which converts the received data to an analog voltage to be supplied to the VCXO.

摘要翻译： 一种频率标准发生器，用于通过使高精度的原子频率标准或其等价物同步并使生成的参考频率和接收的原子频率标准之间的相位差最小化来产生高精度参考频率。 频率标准发生器包括用于产生要用作标准频率信号的高稳定性输出信号的压控晶体振荡器（VCXO），接收无线电波并再现时间信号的无线电波接收机，用作为 VCXO，时间间隔测量电路，测量时间信号和VCXO的输出信号之间的相位差并产生指示相位差的数据;频率控制处理器，其产生控制数据以控制VCXO的频率，使得相位 差异通过锁相环的操作保持恒定值，相位控制器启动用于在预定时间段内减小相位差的相位控制操作;以及D / A转换器，其将接收到的数据转换为模拟电压 供应给VCXO。

公开(公告)号：US5770853A

公开(公告)日：1998-06-23

申请号：US746841

申请日：1996-11-18

申请人： Takeshi Konno ,  Hitoshi Ujiie

发明人： Takeshi Konno ,  Hitoshi Ujiie

IPC分类号： H01L31/12 ,  H03K3/42 ,  H03K17/78 ,  H01J40/14

CPC分类号： H03K17/78

摘要： A pulse generator is provided with a photoconductor in which first to third transmission lines composed of conductive film are formed on a semi-insulating substrate and the transmission lines are separated by first and second narrow gaps, and provides short pulses from short electrical pulses generated on these transmission lines in accordance with short optical pulses irradiated upon each narrow gap. Semiconductor lasers effect the irradiation of short optical pulses upon the first and second narrow gaps. A delay is conferred upon short optical pulses irradiated upon one of the first and second narrow gaps such that pulse height of short electrical pulses generated on the first to third transmission lines is maximized.

摘要翻译： 脉冲发生器设置有光电导体，其中在半绝缘基板上形成由导电膜构成的第一至第三传输线，并且传输线由第一和第二窄间隙分开，并且由短电脉冲提供短脉冲， 这些传输线根据每个窄间隙照射的短光脉冲。 半导体激光器对第一和第二窄间隙的短光脉冲进行照射。 延迟照射在第一和第二窄间隙之一上的短光脉冲，使得在第一至第三传输线上产生的短电脉冲的脉冲高度最大化。

公开(公告)号：US5629649A

公开(公告)日：1997-05-13

申请号：US562106

申请日：1995-11-22

申请人： Hitoshi Ujiie

发明人： Hitoshi Ujiie

IPC分类号： G04G3/00 ,  G01S1/00 ,  G01S19/14 ,  G04R20/00 ,  G04R20/02 ,  G04R40/00 ,  H03L1/02 ,  H03L7/06 ,  H03L7/093 ,  H04L7/033 ,  H03L7/085

CPC分类号： G04R40/02 ,  H03L7/06 ,  H03L1/022

摘要： A frequency standard generator includes a voltage controlled crystal oscillator for generating high stability output signal to be used as a standard frequency signal, a satellite wave receiver which receives a radio wave from a satellite which includes a highly accurate satellite time signal and reproduces the satellite time signal to be used as a reference for the voltage controlled crystal oscillator, a frequency divider which divides the output signal of the voltage controlled crystal oscillator by a dividing ratio arranged to generate a crystal time signal which is identical in frequency to the satellite time signal, a time interval measuring circuit which measures a time interval which is a phase difference between the satellite time signal and the crystal time signal and generates a digital signal indicating the phase difference, a frequency control processor which arithmetically determines control data based on the digital signal from the time interval measuring circuit such that the phase difference maintains a constant value through an operation of a phase lock loop, and a D/A converter which converts the control data from the frequency control processor to an analog voltage which is used to control the output frequency of the voltage controlled crystal oscillator.

摘要翻译： 频率标准发生器包括用于产生要用作标准频率信号的高稳定性输出信号的压控晶体振荡器，接收来自卫星的无线电波的卫星接收机，卫星接收机包括高度精确的卫星时间信号并再现卫星时间 信号用作压控晶体振荡器的参考，分频器，其将压控晶体振荡器的输出信号除以布置成产生频率与卫星时间信号相同的晶体时间信号的分频比， 时间间隔测量电路，其测量作为卫星时间信号和晶体时间信号之间的相位差的时间间隔，并产生指示相位差的数字信号;频率控制处理器，其基于来自 时间间隔测量电路如此 相位差通过锁相环的操作维持恒定值，D / A转换器将来自频率控制处理器的控制数据转换为用于控制压控晶体的输出频率的模拟电压 振荡器

公开(公告)号：US5557196A

公开(公告)日：1996-09-17

申请号：US424369

申请日：1995-04-25

申请人： Hitoshi Ujiie

发明人： Hitoshi Ujiie

IPC分类号： G01R29/26 ,  H03L7/183 ,  F24F7/00

CPC分类号： G01R29/26 ,  H04L1/205 ,  H03L7/183

摘要： There is provided a jitter analyzer which finds various quantities in time/frequency domain of a signal to be measured including a discontinuous burst signal by using two successive period measuring circuits (17, 18), and further can perform an analysis of a frequency component of a jitter in the signal. In case the signal to be measured is a burst signal, the input of the signal from a measuring signal generating circuit (11) into the first and second successive period measuring circuits (17, 18) is inhibited during off-time intervals of the burst signal thereby eliminating data generated during the off-time intervals of the burst signal.

摘要翻译： PCT No.PCT / JP94 / 01389 Sec。 371日期1995年04月25日 102（e）日期1995年04月25日PCT 1994年8月23日提交PCT提供了一种抖动分析器，其通过使用两个连续的周期测量电路（包括不连续的突发信号）在待测信号的时间/频域中发现各种量 17,18），并且还可以对信号中的抖动的频率分量进行分析。 在要测量的信号是突发信号的情况下，在脉冲串的关闭时间间隔期间禁止从测量信号发生电路（11）到第一和第二连续周期测量电路（17,18）的信号的输入 信号，从而消除在突发信号的关闭时间间隔期间产生的数据。