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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
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.
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公开(公告)号：US10153776B2
公开(公告)日：2018-12-11
申请号：US15517520
申请日：2015-09-24
Applicant: NIHON DEMPA KOGYO CO., LTD.
Inventor： Hiroyuki Demura , Kaoru Kobayashi
Abstract: The present invention provides a frequency synthesizer that is switchable at a high speed and includes a few unnecessary frequency components in an output frequency signal. In a frequency synthesizer 1, a DDS 2 operates based on a clock signal to generate a reference frequency signal with a predetermined reference frequency, and clock signal supply units 41 and 42 switch the clock signals that have different clock frequencies to supply to the DDS 2. When the clock signals are switched to operate the DDS 2, the storage unit 12 stores a combination of a clock frequency fclk, a reference frequency fc, and a dividing number N in association with an output frequency fVCO of the frequency synthesizer 1 such that a spurious frequency does not exist within a predetermined frequency range and a dividing number of a variable frequency divider 302 disposed on a PLL circuit 3 is minimum. Setting units 11 and 24 read setting items stored in the storage unit 12 to set respective units.
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Patent Agency Ranking
公开(公告)号：US09100023B2
公开(公告)日：2015-08-04
申请号：US14226826
申请日：2014-03-27
Applicant: NIHON DEMPA KOGYO CO., LTD.
Inventor： Kazuo Akaike , Kaoru Kobayashi
IPC: H03L1/02
CPC classification number: H03L1/028
Abstract: A crystal oscillator includes: an oscillation circuit; first and second oscillation circuits connected to first and second temperature detection crystal units, respectively; a heating portion configured to constantly maintain an ambient temperature; a frequency difference detection portion that obtains, as a temperature detection value, “{(f2−f1)/f1}−{(f2r−f1r)/f1r}”, where “f1” and “f2” denote oscillation frequencies of the first and second oscillation circuits, respectively, and “f1r” and “f2r” denote oscillation frequencies of the first and second oscillation circuits, respectively, at a reference temperature; an accumulator that accumulates the temperature detection value; a rounding processing portion that performs rounding for the temperature detection value accumulated in the accumulator depending on a rounding factor designated independently from the accumulation number; and a heating control portion that controls power supplied to the heating portion based on the temperature detection value subjected to the rounding in the rounding processing portion.
Abstract translation: 晶体振荡器包括：振荡电路; 分别连接到第一和第二温度检测晶体单元的第一和第二振荡电路; 加热部分，被配置为恒定地保持环境温度; 获得作为温度检测值的“{（f2-f1）/ f1} - {（f2r-f1r）/ f1r}”的频率差检测部，其中，“f1”和“f2”表示第一 和第二振荡电路，“f1r”和“f2r”分别表示在基准温度下的第一和第二振荡电路的振荡频率; 累加温度检测值的累加器; 舍入处理部，根据累积次数独立地指定的舍入系数，对存储在累加器中的温度检测值进行舍入; 以及加热控制部，其基于在舍入处理部中进行舍入的温度检测值来控制供给到加热部的功率。
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公开(公告)号：US09154139B2
公开(公告)日：2015-10-06
申请号：US14166814
申请日：2014-01-28
Applicant: NIHON DEMPA KOGYO CO., LTD.
Inventor： Kazuo Akaike , Kaoru Kobayashi
Abstract: A crystal controlled oscillator of the present disclosure includes: an oscillator circuit for oscillator output, a first oscillator circuit, a second oscillator circuit, a heating unit, a pulse generator, a frequency difference detector, an addition unit, a circuit unit, a frequency measuring unit, a determination unit, and a signal selector. The signal selector is configured to: select a control signal where electric power supplied to the heating unit is smaller than supplied electric power in the detection range in a case where a frequency in a set period at the train of pulses is out of the detection range at the high temperature side; select a control signal where electric power supplied to the heating unit becomes a preset value in a case where a frequency in the set period at the train of pulses is out of the detection range at the low temperature side.
Abstract translation: 本公开的晶体振荡器包括：用于振荡器输出的振荡器电路，第一振荡器电路，第二振荡器电路，加热单元，脉冲发生器，频率差检测器，加法单元，电路单元，频率 测量单元，确定单元和信号选择器。 信号选择器被配置为：在脉冲串的设定周期的频率超出检测范围的情况下，选择供给到加热单元的电力小于检测范围内的供电电力的控制信号 在高温侧; 在脉冲串的设定期间的频率低于低温侧的检测范围的情况下，选择供给加热单元的电力为预设值的控制信号。
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公开(公告)号：US08659364B2
公开(公告)日：2014-02-25
申请号：US13663482
申请日：2012-10-30
Applicant: Nihon Dempa Kogyo Co., Ltd.
Inventor： Kaoru Kobayashi
IPC: H03B5/36
CPC classification number: H03L1/028
Abstract: A value corresponding to a difference value between a value corresponding to a difference between f1 and f1r and a value corresponding to a difference between f2 and f2r is treated as an instantaneous temperature, where f1 and f2 denote oscillation outputs of the first and second oscillation circuits, respectively, and f1r and f2r denote oscillation frequencies of the first and second oscillation circuits, respectively, at a reference temperature. A first correction value is obtained using an approximation formula of the frequency correction value of f1 based on the value corresponding to the difference value, and a second correction value for canceling a correction residual error is obtained from the correction residual error which is a difference between the first correction value and the frequency correction value actually measured. The frequency correction value is obtained from a sum of the first and second correction values.
Abstract translation: 对应于与f1和f1r之间的差值相对应的值与f2和f2r之间的差对应的值的值被视为瞬时温度，其中f1和f2表示第一和第二振荡电路的振荡输出 f1r和f2r分别表示在基准温度下的第一和第二振荡电路的振荡频率。 使用基于与差值相对应的值的频率校正值f1的近似公式获得第一校正值，并且从校正残差误差获得用于抵消校正残差的第二校正值，校正残差是第 实际测量的第一校正值和频率校正值。 频率校正值从第一和第二校正值的和获得。
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公开(公告)号：US10164571B2
公开(公告)日：2018-12-25
申请号：US15209762
申请日：2016-07-14
Applicant: NIHON DEMPA KOGYO CO., LTD.
Inventor： Takashi Nakaoka , Kazuo Akaike , Hiroshi Hoshigami , Kaoru Kobayashi
Abstract: An crystal resonator includes a first oscillating circuit that oscillates a crystal resonator at a first frequency, a first impedance adjusting circuit that adjusts an impedance of a first oscillating system including the crystal resonator and the first oscillating circuit, a second oscillating circuit that oscillates the crystal resonator at a second frequency that is different from the first frequency, a second impedance adjusting circuit that adjusts an impedance of a second oscillating system including the crystal resonator and the second oscillating circuit, and a controlling circuit that controls the first impedance adjusting circuit and the second impedance adjusting circuit.
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公开(公告)号：US09225342B2
公开(公告)日：2015-12-29
申请号：US14228251
申请日：2014-03-28
Applicant: NIHON DEMPA KOGYO CO., LTD.
Inventor： Kazuo Akaike , Kaoru Kobayashi
Abstract: An oscillation device corrects a setting value of an output frequency based on a detection result of an ambient temperature of a crystal unit. The oscillation device includes: an oscillation circuit; a temperature detection portion that detects the ambient temperature and outputs a digital value corresponding to the temperature detection value; an accumulator that accumulates the digital value; a rounding processing portion that performs rounding for the digital value accumulated in the accumulator; a digital filter that receives the digital value obtained from the rounding processing portion and obtains a step response gradually increasing from “0” and converging to a step value; and a correction value obtaining portion that obtains a frequency correction value of the oscillation frequency of the oscillation circuit caused by a difference between the ambient temperature and a reference temperature, wherein the setting value of the output frequency is corrected based on the frequency correction value.
Abstract translation: 振荡装置根据晶体单元的环境温度的检测结果来校正输出频率的设定值。 振荡装置包括：振荡电路; 温度检测部，其检测所述环境温度并输出与所述温度检测值对应的数字值; 累加数字值的累加器; 舍入处理部，对累加在累加器中的数字值进行舍入; 数字滤波器，接收从舍入处理部获得的数字值，并获得从“0”逐渐增加并收敛到阶跃值的阶跃响应; 以及校正值获取部分，其获得由环境温度和基准温度之间的差引起的振荡电路的振荡频率的频率校正值，其中基于频率校正值校正输出频率的设定值。
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