公开(公告)号：US09716511B1

公开(公告)日：2017-07-25

申请号：US15434058

申请日：2017-02-16

Applicant: NIHON DEMPA KOGYO CO., LTD.

Inventor： Tomoya Yorita ,  Naoki Onishi

IPC: H03M1/12 ,  H03B5/32 ,  H03L7/08 ,  H03K19/177 ,  H03M1/34

CPC classification number: H03M1/1245 ,  H03K19/17704 ,  H03L7/08 ,  H03M1/0624

Abstract: A signal processing device includes a plurality of converters, a generator, a distributor, a first line, and a second line. A plurality of converters is configured to convert analog signals to digital signals based on a clock signal to output the digital signals. The generator is configured to generate the clock signal based on a reference signal. The distributor is configured to distribute a generated clock signal to the plurality of converters. The first line passes through only a region assigned to each of the plurality of converters to supply the analog signal to the converter. The second line passes through only the region to supply a distributed clock signal to the converter.

公开(公告)号：US09300250B2

公开(公告)日：2016-03-29

申请号：US14082700

申请日：2013-11-18

Applicant: NIHON DEMPA KOGYO CO., LTD.

Inventor： Yasuo Kitayama ,  Hiroyuki Demura ,  Naoki Onishi

IPC: H03B21/00 ,  H03G1/00 ,  H03G3/30 ,  H03L5/00

CPC classification number: H03B21/00 ,  H03G1/0058 ,  H03G3/30 ,  H03L5/00

Abstract: To provide, in a frequency synthesizer including: a variable attenuator provided at a subsequent stage of a voltage controlled oscillator; a detector; and a control unit outputting a control voltage for adjusting an attenuation amount of the variable attenuator via a digital/analog converter in accordance with a detection voltage, a technology with which a spurious due to a change in an output of the digital/analog converter can be suppressed. A low-pass filter is provided between an output side of a digital/analog converter and a variable attenuator to cut a frequency component corresponding to an overshoot generated when an output of the digital/analog converter is changed. Further, a period of time from when a control unit outputs a control voltage to when it reads a signal level detected by a detector is set to a period of time longer than a time constant of the low-pass filter determined by a cut-off frequency of the low-pass filter so that no influence is exerted on an operation of automatically controlling the signal level.

Abstract translation: 提供一种频率合成器，包括：设置在压控振荡器的后续级的可变衰减器; 检测器 以及控制单元，其根据检测电压输出用于经由数字/模拟转换器调整可变衰减器的衰减量的控制电压，由于数字/模拟转换器的输出的变化引起的寄生的杂散技术 被压制 在数字/模拟转换器的输出侧和可变衰减器之间提供低通滤波器，以便在数字/模拟转换器的输出改变时产生的过冲相应的剪切频率分量。 此外，从控制单元输出控制电压到读取检测器检测到的信号电平的时间段被设置为比由截止器确定的低通滤波器的时间常数更长的时间段 低通滤波器的频率，从而不会对自动控制信号电平的操作产生影响。

公开(公告)号：US10541762B1

公开(公告)日：2020-01-21

申请号：US16522616

申请日：2019-07-25

Applicant: NIHON DEMPA KOGYO CO., LTD.

Inventor： Kaoru Kobayashi ,  Naoki Onishi

IPC: H04B17/00 ,  H04B17/21 ,  H04B17/27

Abstract: An angular error detecting device detects an angular error in a receiving direction of a frequency signal from a tracking target with respect to a front direction of an antenna based on a phase difference of a first reception signal received at a first receiving unit of the antenna and a second reception signal received at a second receiving unit having a receiving position in the antenna different from a receiving position of the first receiving unit. The angular error detecting device includes a reception signal output unit, a pilot signal supply unit, a pilot phase difference detection unit, a correction unit, and an angular error detection unit. The angular error detection unit detects the angular error based on the one side corrected at the correction unit and the other side that is not corrected of the sum signal and the difference signal.

公开(公告)号：US09306578B2

公开(公告)日：2016-04-05

申请号：US14571304

申请日：2014-12-16

Applicant: NIHON DEMPA KOGYO CO., LTD.

Inventor： Hiroki Kimura ,  Naoki Onishi

IPC: H03L1/04 ,  H03B5/36

CPC classification number: H03L1/04 ,  H03B5/362 ,  H03B5/368 ,  H03L1/028

Abstract: An oscillator includes an oscillator circuit, a crystal filter, a package portion, and a heating portion. The oscillator circuit is configured to output an oscillation signal. The crystal filter has a frequency characteristic where an attenuation at a detuned frequency is larger than an attenuation at an oscillation frequency of the oscillation signal. The detuned frequency is a frequency different from the oscillation frequency. The package portion covers a crystal blank of the oscillator circuit and a crystal blank of the crystal filter. The heating portion is configured to heat the crystal blank of the oscillator circuit and the crystal blank of the crystal filter using a resistor disposed between: a wiring board to which the package portion is secured, and the package portion.

Abstract translation: 振荡器包括振荡电路，晶体滤波器，封装部分和加热部分。 振荡电路被配置为输出振荡信号。 晶体滤波器具有频率特性，其中失谐频率处的衰减大于振荡信号的振荡频率处的衰减。 失谐频率是与振荡频率不同的频率。 封装部分覆盖振荡器电路的晶体空白和晶体滤波器的晶体空白。 加热部构造为使用设置在封装部固定的布线基板与封装部之间的电阻来加热振荡电路的晶体坯和晶体滤波器的晶体坯。

公开(公告)号：US20140077844A1

公开(公告)日：2014-03-20

申请号：US14082700

申请日：2013-11-18

Applicant: Nihon Dempa Kogyo Co., Ltd.

Inventor： Yasuo Kitayama ,  Hiroyuki Demura ,  Naoki Onishi

IPC: H03B21/00

CPC classification number: H03B21/00 ,  H03G1/0058 ,  H03G3/30 ,  H03L5/00

Abstract: To provide, in a frequency synthesizer including: a variable attenuator provided at a subsequent stage of a voltage controlled oscillator; a detector; and a control unit outputting a control voltage for adjusting an attenuation amount of the variable attenuator via a digital/analog converter in accordance with a detection voltage, a technology with which a spurious due to a change in an output of the digital/analog converter can be suppressed. A low-pass filter is provided between an output side of a digital/analog converter and a variable attenuator to cut a frequency component corresponding to an overshoot generated when an output of the digital/analog converter is changed. Further, a period of time from when a control unit outputs a control voltage to when it reads a signal level detected by a detector is set to a period of time longer than a time constant of the low-pass filter determined by a cut-off frequency of the low-pass filter so that no influence is exerted on an operation of automatically controlling the signal level.

Abstract translation: 提供一种频率合成器，包括：设置在压控振荡器的后续级的可变衰减器; 检测器 以及控制单元，其根据检测电压输出用于经由数字/模拟转换器调整可变衰减器的衰减量的控制电压，由于数字/模拟转换器的输出的变化引起的寄生的杂散技术 被压制 在数字/模拟转换器的输出侧和可变衰减器之间提供低通滤波器，以便在数字/模拟转换器的输出改变时产生的过冲相应的剪切频率分量。 此外，从控制单元输出控制电压到读取检测器检测到的信号电平的时间段被设置为比由截止器确定的低通滤波器的时间常数更长的时间段 低通滤波器的频率，从而不会对自动控制信号电平的操作产生影响。