公开(公告)号：US08145067B2

公开(公告)日：2012-03-27

申请号：US12585120

申请日：2009-09-03

Applicant: Akira Nagayama ,  Kazuyoshi Shimizu

Inventor： Akira Nagayama ,  Kazuyoshi Shimizu

IPC: H04B10/04

CPC classification number: G02F1/0123 ,  H04B10/50572 ,  H04B10/50575

Abstract: An optical transmitter includes a light source that outputs light superposed with a pilot signal having a predetermined frequency; an optical modulating unit that modulates the light from the light source according to an input electric signal; a detecting unit that detects a high-output-side maximum value of signal light output from the optical modulating unit, a fluctuation width of the high-output-side maximum value, and a fluctuation width of a low-output-side minimum value; a bias-potential adjusting unit that adjusts a bias potential of an electric signal to be input to the optical modulating unit based on the detected maximum value; and an amplitude adjusting unit that adjusts an amplitude of the electric signal to be input to the optical modulating unit based on the fluctuation width of the high-output-side maximum value and the fluctuation width of the low-output-side minimum value.

Abstract translation: 光发射机包括输出与具有预定频率的导频信号叠加的光的光源; 光调制单元，其根据输入电信号调制来自光源的光; 检测单元，其检测从光调制单元输出的信号光的高输出侧最大值，高输出侧最大值的波动宽度和低输出侧最小值的波动宽度; 偏置电位调整单元，其基于检测到的最大值来调整要输入到所述光调制单元的电信号的偏置电位; 以及幅度调整单元，其基于高输出侧最大值的波动宽度和低输出侧最小值的波动宽度来调整要输入到光调制单元的电信号的幅度。

公开(公告)号：US07630651B2

公开(公告)日：2009-12-08

申请号：US11357116

申请日：2006-02-21

Applicant: Kazuyoshi Shimizu ,  Akira Nagayama

Inventor： Kazuyoshi Shimizu ,  Akira Nagayama

IPC: H04B10/04 ,  G02F1/01

CPC classification number: H04B10/505 ,  H04B10/50575 ,  H04B10/564

Abstract: An optical transmitter includes: a modulating unit that modulates an optical signal based on an electric signal; a first detecting unit that detects a first variation width of a maximum output of the modulated optical signal; a second detecting unit that detects a second variation width of a minimum output of the modulated optical signal; a comparing unit that performs a comparison of the first variation width and the second variation width; and an adjusting unit that adjusts a bias potential of the electric signal based on a result of the comparison.

Abstract translation: 光发射机包括：调制单元，用于根据电信号调制光信号; 第一检测单元，其检测调制光信号的最大输出的第一变化幅度; 第二检测单元，其检测调制光信号的最小输出的第二变化幅度; 执行第一变化宽度和第二变化宽度的比较的比较单元; 以及调整单元，其基于比较的结果来调整电信号的偏置电位。

公开(公告)号：US07358712B2

公开(公告)日：2008-04-15

申请号：US11209644

申请日：2005-08-24

Applicant: Kazuyoshi Shimizu ,  Akira Nagayama

Inventor： Kazuyoshi Shimizu ,  Akira Nagayama

IPC: G05F5/00

CPC classification number: H05B41/2856 ,  Y10S323/908

Abstract: A power supply control circuit includes: a conducting part configured to be controllable in its a conducting amount for conducting a power supply current to a load circuit;a current change ratio detecting part detecting a change rate of the power supply current supplied to the load circuit; and a control part controlling the conducting amount of the conducting part according to the change rate of the power supply current detected by the current change detecting part, wherein: the control part carries out feedback control of reducing an increasing rate of the conducting part as the power supply current change rate is larger.

Abstract translation: 电源控制电路包括：导电部，被配置为可控制的导电量，用于向负载电路传导电源电流; 检测提供给负载电路的电源电流的变化率的电流变化率检测部; 以及控制部，其根据由电流变化检测部检测出的电源电流的变化率来控制导通部的导通量，其中：所述控制部进行将导通部的增加率减小为 电源电流变化率较大。

公开(公告)号：US20060208668A1

公开(公告)日：2006-09-21

申请号：US11209644

申请日：2005-08-24

Applicant: Kazuyoshi Shimizu ,  Akira Nagayama

Inventor： Kazuyoshi Shimizu ,  Akira Nagayama

IPC: H05B39/04

CPC classification number: H05B41/2856 ,  Y10S323/908

Abstract: A power supply control circuit includes: a conducting part configured to be controllable in its a conducting amount for conducting a power supply current to a load circuit; a current change ratio detecting part detecting a change rate of the power supply current supplied to the load circuit; and a control part controlling the conducting amount of the conducting part according to the change rate of the power supply current detected by the current change detecting part, wherein: the control part carries out feedback control of reducing an increasing rate of the conducting part as the power supply current change rate is larger.

Abstract translation: 电源控制电路包括：导电部，被配置为可控制的导电量，用于向负载电路传导电源电流; 检测提供给负载电路的电源电流的变化率的电流变化率检测部; 以及控制部，其根据由电流变化检测部检测出的电源电流的变化率来控制导通部的导通量，其中：所述控制部进行将导通部的增加率减小为 电源电流变化率较大。

公开(公告)号：US08416004B2

公开(公告)日：2013-04-09

申请号：US13314642

申请日：2011-12-08

Applicant: Masaru Akizawa ,  Kazuyoshi Shimizu

Inventor： Masaru Akizawa ,  Kazuyoshi Shimizu

IPC: H03K5/08

CPC classification number: G06F1/30 ,  G06F1/266 ,  H02H9/001 ,  H03K17/162 ,  H03K17/163

Abstract: A circuit module includes: control object circuits which start operations when a power supply voltage reaches a target value; a current sink circuit which consumes a current supplied thereto; and a power supply activation control unit which increases the current flowing into the current sink circuit at a predetermined rate before starting the operations of the control object circuits and which starts the operations of the control object circuits and simultaneously blocks the supply of the current to the current sink circuit in a case where an amount of the current flowing into the current sink circuit is equivalent to an amount of current to be increased by starting the operations of the control object circuits when the power supply voltage reaches the target value.

Abstract translation: 电路模块包括：当电源电压达到目标值时开始操作的控制对象电路; 消耗提供给其的电流的电流吸收电路; 以及电源启动控制单元，其在开始控制对象电路的操作之前以预定速率增加流入当前宿电路的电流，并且开始控制对象电路的操作，同时阻止向 在电源电压达到目标值的情况下，流入电流吸收电路的电流量等于通过开始控制对象电路的动作而增加的电流量的情况下的电流吸收电路。

公开(公告)号：US20090324252A1

公开(公告)日：2009-12-31

申请号：US12585120

申请日：2009-09-03

Applicant: Akira Nagayama ,  Kazuyoshi Shimizu

Inventor： Akira Nagayama ,  Kazuyoshi Shimizu

IPC: H04B10/04

CPC classification number: G02F1/0123 ,  H04B10/50572 ,  H04B10/50575

Abstract: An optical transmitter includes a light source that outputs light superposed with a pilot signal having a predetermined frequency; an optical modulating unit that modulates the light from the light source according to an input electric signal; a detecting unit that detects a high-output-side maximum value of signal light output from the optical modulating unit, a fluctuation width of the high-output-side maximum value, and a fluctuation width of a low-output-side minimum value; a bias-potential adjusting unit that adjusts a bias potential of an electric signal to be input to the optical modulating unit based on the detected maximum value; and an amplitude adjusting unit that adjusts an amplitude of the electric signal to be input to the optical modulating unit based on the fluctuation width of the high-output-side maximum value and the fluctuation width of the low-output-side minimum value.

Abstract translation: 光发射机包括输出与具有预定频率的导频信号叠加的光的光源; 光调制单元，其根据输入电信号调制来自光源的光; 检测单元，其检测从光调制单元输出的信号光的高输出侧最大值，高输出侧最大值的波动宽度和低输出侧最小值的波动宽度; 偏置电位调整单元，其基于检测到的最大值来调整要输入到所述光调制单元的电信号的偏置电位; 以及幅度调整单元，其基于高输出侧最大值的波动宽度和低输出侧最小值的波动宽度来调整要输入到光调制单元的电信号的幅度。

公开(公告)号：US07069793B2

公开(公告)日：2006-07-04

申请号：US10965158

申请日：2004-10-14

Applicant: Hiroaki Ishikawa ,  Kazuyoshi Shimizu ,  Ayumi Sekine

Inventor： Hiroaki Ishikawa ,  Kazuyoshi Shimizu ,  Ayumi Sekine

IPC: G01F1/20

CPC classification number: G01F1/667 ,  G01F1/662

Abstract: An ultrasonic flow meter for measuring a flow rate in a flow path is provided having ultrasonic sensors each of which includes a semicircular or substantially circular disk shaped transducer. Such transducers are detachably mountable on an envelope of the flow path. The thickness of the ultrasonic sensors in the direction of the length of the flow path is reduced to improve a detection resolution. A plurality of the ultrasonic sensors are mounted on the flow path while keeping a predetermined distance therebetween in a length direction of the flow path, so that the flow rate can be measured from the difference of propagation times of ultrasonic waves between the ultrasonic sensors.

Abstract translation: 提供了一种用于测量流路中的流量的超声波流量计，其具有超声波传感器，每个超声波传感器包括半圆形或大致圆形的盘形换能器。 这种换能器可拆卸地安装在流路的外壳上。 超声波传感器在流路长度方向上的厚度减小以提高检测分辨率。 多个超声波传感器安装在流路上，同时在流路的长度方向上保持预定的距离，从而可以根据超声波传感器之间的超声波的传播时间差来测量流量。

公开(公告)号：US07027730B2

公开(公告)日：2006-04-11

申请号：US10289305

申请日：2002-11-07

Applicant: Akira Nagayama ,  Kazuyoshi Shimizu

Inventor： Akira Nagayama ,  Kazuyoshi Shimizu

IPC: H04B10/08 ,  H04B17/00

CPC classification number: H04B10/272 ,  H04B10/077 ,  H04B10/07955 ,  H04B10/2504 ,  H04B10/27 ,  H04L12/44 ,  H04L43/50

Abstract: The invention provides a method for measuring transmission loss in an optical transmission line between a master station and a slave station, and also a slave station, a master station and a star network communication system using this method. Power of an optical signal is measured at a second end of an optical transmission line connected with an added slave station and at a first end other than the second end. The result at the first end is stored in a storing unit or transmitted to an incorporating unit by a transferring unit. The incorporating unit incorporates the result into a downstream optical signal, which is transmitted to the slave station. In the slave station an information extracting unit extracts the result from the downstream optical signal, and a processing unit calculates a difference between the measurement results of the first and second ends to obtain transmission loss therebetween.

公开(公告)号：US6049238A

公开(公告)日：2000-04-11

申请号：US178580

申请日：1998-10-26

Applicant: Kazuyoshi Shimizu ,  Kouichi Ishimi ,  Katsunori Sawai

Inventor： Kazuyoshi Shimizu ,  Kouichi Ishimi ,  Katsunori Sawai

IPC: H03K3/027 ,  H03K3/86 ,  H03L7/06 ,  H03L7/08 ,  H03L7/181

CPC classification number: H03K3/027 ,  H03K3/86 ,  H03L7/06 ,  H03L7/08 ,  H03L7/181

Abstract: A clock generator including a frequency multiplier, a phase lock circuit and a frequency divider. The frequency multiplier generates a frequency multiplied clock by multiplying the frequency of an input clock. The phase lock circuit detects a phase difference between the input clock and a frequency divided clock, and generates, by delaying the frequency multiplied clock by an amount corresponding to the phase difference, a phase-locked clock with its phase locked with the input clock. The frequency divider detects in every fixed cycle a particular pulse of the phase-locked clock, and generates the frequency divided clock by dividing the phase-locked clock with reference to the particular pulse of the phase-locked clock. In particular, the frequency divider detects the particular pulse immediately previous to a falling edge of the input clock. This can reduce the phase difference between the input clock and the phase-locked clock, and hence to solve a problem of a conventional clock generator in that a delay time of a digital delay line in a phase lock circuit must be lengthened with a reduction in the multiplication number of the frequency multiplied clock, which requires a greater number of delay elements because of a large occupying area of the delay elements and a decoder, thereby increasing the circuit scale and cost of a chip to reduce the multiplication number of the frequency multiplied clock.

Abstract translation: 包括倍频器，锁相电路和分频器的时钟发生器。 倍频器通过乘以输入时钟的频率来产生倍频时钟。 锁相电路检测输入时钟和分频时钟之间的相位差，并通过将倍频时钟延迟与相位差对应的量来产生锁相时钟，其锁相与输入时钟相锁相。 分频器在每个固定周期内检测锁相时钟的特定脉冲，并通过相对于锁相时钟的特定脉冲对相位锁定时钟进行分频来产生分频时钟。 特别地，分频器检测紧接在输入时钟下降沿之前的特定脉冲。 这可以减小输入时钟和锁相时钟之间的相位差，因此解决传统的时钟发生器的问题在于，锁相电路中的数字延迟线的延迟时间必须延长，同时减少 频率倍增时钟的倍数，由于延迟元件的占用面积大，解码器需要较大数量的延迟元件，从而增加了芯片的电路规模和成本，从而减少倍频的倍数 时钟。

公开(公告)号：US20050097968A1

公开(公告)日：2005-05-12

申请号：US10965158

申请日：2004-10-14

Applicant: Hiroaki Ishikawa ,  Kazuyoshi Shimizu ,  Ayumi Sekine

Inventor： Hiroaki Ishikawa ,  Kazuyoshi Shimizu ,  Ayumi Sekine

IPC: G01F1/00 ,  G01F1/66

CPC classification number: G01F1/667 ,  G01F1/662

Abstract: An ultrasonic flow meter for measuring a flow rate in a flow path is provided having ultrasonic sensors each of which includes a semicircular or substantially circular disk shaped transducer. Such transducers are detachably mountable on an envelope of the flow path. The thickness of the ultrasonic sensors in the direction of the length of the flow path is reduced to improve a detection resolution. A plurality of the ultrasonic sensors are mounted on the flow path while keeping a predetermined distance therebetween in a length direction of the flow path, so that the flow rate can be measured from the difference of propagation times of ultrasonic waves between the ultrasonic sensors.

Abstract translation: 提供了一种用于测量流路中的流量的超声波流量计，其具有超声波传感器，每个超声波传感器包括半圆形或大致圆形的盘形换能器。 这种换能器可拆卸地安装在流路的外壳上。 超声波传感器在流路长度方向上的厚度减小以提高检测分辨率。 多个超声波传感器安装在流路上，同时在流路的长度方向上保持预定的距离，从而可以根据超声波传感器之间的超声波的传播时间差来测量流量。