公开(公告)号：US10401768B2

公开(公告)日：2019-09-03

申请号：US15179348

申请日：2016-06-10

Applicant: Tetsuroh Tatebe ,  Tomohiko Kamatani

Inventor： Tetsuroh Tatebe ,  Tomohiko Kamatani

IPC: H02P1/26 ,  H02P1/32 ,  G05B15/02 ,  G03G15/00 ,  H04B15/04

Abstract: A signal level adjustment apparatus includes a detector configured to detect both a plurality of peak levels of an input signal having a sinusoidal waveform or a substantially sinusoidal waveform and a plurality of bottom levels of the input signal; and a level adjuster configured to adjust, in a predetermined zone of the input signal, levels of the input signal based on the plurality of peak levels and the plurality of bottom levels detected by the detector.

公开(公告)号：US20150253159A1

公开(公告)日：2015-09-10

申请号：US14633794

申请日：2015-02-27

Applicant: Tomohiko Kamatani

Inventor： Tomohiko Kamatani

IPC: G01D5/20 ,  H02P6/16

CPC classification number: H02P6/16 ,  G01D5/145 ,  H02P6/188

Abstract: A phase detector includes a crossing-point phase detection circuit to compare signals levels of pairs of sensor signals and output crossing-point phase detection signals indicating phases of crossing points between the pairs of the sensor signals, each having a signal level corresponding to a rotational position of a rotor of a motor having coils, a crossing-point level detection circuit to output crossing-point level signals indicating crossing-point levels detected, a signal selection circuit to select one of the sensor signals as a selection signal, a phase detection circuit to detect that a signal level of the selection signal has reached a threshold level, and output a phase data signal indicating a phase of the rotor corresponding to the threshold level, and an in-phase level adjustment circuit to adjust and output in-phase levels of the sensor signals to approach each of the crossing-point levels to a predetermined signal level.

Abstract translation: 相位检测器包括：交叉点相位检测电路，用于比较传感器信号对的信号电平和输出交叉点相位检测信号，所述输出交叉点相位检测信号指示传感器信号对之间的交叉点的相位，每个传感器信号对具有对应于旋转 具有线圈的电动机的转子的位置，交叉点电平检测电路，输出指示检测到的交叉点电平的交叉点电平信号，选择传感器信号之一作为选择信号的信号选择电路，相位检测 电路，用于检测选择信号的信号电平已经达到阈值电平，并且输出指示与阈值电平对应的转子相位的相位数据信号，以及同相电平调整电路，用于同相 传感器信号的电平接近每个交叉点电平到预定信号电平。

公开(公告)号：US08804784B2

公开(公告)日：2014-08-12

申请号：US13386463

申请日：2010-07-14

Applicant: Tomohiko Kamatani

Inventor： Tomohiko Kamatani

IPC: H01S3/00

CPC classification number: H01S5/06825 ,  G06K15/1209

Abstract: A semiconductor laser driving device that drives a semiconductor laser with a driving current output from a driving current output terminal is disclosed. The semiconductor laser driving device includes a driving current monitoring terminal configured to output a driving current monitoring current having a value of 1/α of the driving current; a current-voltage conversion resistor connected to the driving current monitoring terminal and configured to convert the driving current monitoring current having the value of 1/α of the driving current into a corresponding driving current monitoring voltage; and a detector configured to generate a reference voltage and detect whether the corresponding driving current monitoring voltage has reached the reference voltage.

Abstract translation: 公开了一种半导体激光器驱动装置，其驱动从驱动电流输出端子输出的驱动电流的半导体激光器。 半导体激光器驱动装置包括：驱动电流监视端子，被配置为输出具有驱动电流的1 /α值的驱动电流监视电流; 连接到所述驱动电流监视端子并且被配置为将具有所述驱动电流的1 /α值的驱动电流监视电流转换成相应的驱动电流监视电压的电流 - 电压转换电阻; 以及检测器，被配置为产生参考电压并检测相应的驱动电流监视电压是否已经达到参考电压。

公开(公告)号：US07940036B2

公开(公告)日：2011-05-10

申请号：US12367749

申请日：2009-02-09

Applicant: Tomohiko Kamatani

Inventor： Tomohiko Kamatani

IPC: G05F3/04

CPC classification number: H03F3/45179 ,  H03F2203/45101 ,  H03F2203/45354 ,  H03F2203/45392 ,  H03F2203/45674

Abstract: A disclosed voltage comparison circuit for detecting a voltage difference of two input signals includes one or more differential amplifier circuits, each of which has a differential pair of first and second input transistors each having an electrode to which a corresponding one of the input signals is input, a constant current circuit configured to generate constant current according to a control signal and supply the constant current to the first and second input transistors, and a first resistor connected between the constant current circuit and the first input transistor; and a current control circuit configured to control a value of the first constant current. The current control circuit controls the value so that a voltage difference between both ends of the first resistor becomes equal to a predetermined value.

Abstract translation: 公开的用于检测两个输入信号的电压差的电压比较电路包括一个或多个差分放大器电路，每个差分放大器电路具有一对差分对的第一和第二输入晶体管，每个具有输入信号的相应一个输入信号的电极 恒流电路，被配置为根据控制信号产生恒定电流，并向第一和第二输入晶体管提供恒定电流，以及连接在恒流电路和第一输入晶体管之间的第一电阻器; 以及电流控制电路，被配置为控制第一恒定电流的值。 电流控制电路控制该值，使得第一电阻器的两端之间的电压差等于预定值。

公开(公告)号：US07592855B2

公开(公告)日：2009-09-22

申请号：US11821457

申请日：2007-06-21

Applicant: Tomohiko Kamatani

Inventor： Tomohiko Kamatani

IPC: H01H37/76

CPC classification number: H01L27/0629 ,  H01C7/006 ,  H01C17/22 ,  H01L27/0802

Abstract: A trimming circuit is disclosed. The trimming circuit includes a first trimming circuit having resistors and fuses, and a second trimming circuit having a resistor, an NMOS transistor, and a control circuit. The control circuit includes an inverter circuit and a series circuit in which a resistor and fuses are connected in series. The first trimming circuit is connected with a reference resistor in series and the second trimming circuit is connected with the reference resistor in parallel.

Abstract translation: 公开了一种微调电路。 微调电路包括具有电阻器和熔丝的第一微调电路和具有电阻器，NMOS晶体管和控制电路的第二微调电路。 控制电路包括反相器电路和串联电路，其中电阻器和保险丝串联连接。 第一微调电路与参考电阻串联连接，第二微调电路并联连接参考电阻。

公开(公告)号：US11137595B2

公开(公告)日：2021-10-05

申请号：US16658247

申请日：2019-10-21

Applicant: Akitoshi Mochida ,  Tomohiko Kamatani

Inventor： Akitoshi Mochida ,  Tomohiko Kamatani

IPC: G02B26/08 ,  G02B26/10 ,  F21S41/675 ,  G01S7/481 ,  G02B27/01 ,  G03G15/04

Abstract: A light deflection device includes a reflector; a drive beam supporting the reflector such that the reflector is movable; a supporting section supporting the drive beam; and a piezoelectric drive circuit disposed on the drive beam. The light deflection device further includes circuitry configured to output a first drive-voltage waveform and a second drive-voltage waveform to the piezoelectric drive circuit. The first drive-voltage waveform has a period of a positive slope within one cycle, the period of the positive slope includes a period of a first slope and a period of a second slope different from the first slope. The second drive-voltage waveform has a period of a negative slope within one cycle, and the period of the negative slope includes a period of a third slope and a period of a fourth slope different from the third slope.

公开(公告)号：US10326387B2

公开(公告)日：2019-06-18

申请号：US15656110

申请日：2017-07-21

Applicant: Tomohiko Kamatani

Inventor： Tomohiko Kamatani

IPC: H02P6/14 ,  H02P6/16 ,  G01R31/34 ,  H02K11/20

Abstract: A phase detecting device includes a signal level detector configured to detect a first level of a signal according to a phase of a rotor of a motor, a level memory configured to store the first level of the signal preliminarily detected at each phase of the rotor as a second level of the signal at the phase of the rotor, and a phase detector configured to detect the phase of the rotor based on the second level of the signal inputted from the signal level detector.

公开(公告)号：US08755419B2

公开(公告)日：2014-06-17

申请号：US12868182

申请日：2010-08-25

Applicant: Tomohiko Kamatani

Inventor： Tomohiko Kamatani

IPC: H01S3/00 ,  H01S5/00

CPC classification number: H01S5/042 ,  H01S5/0428 ,  H01S5/0683

Abstract: A laser diode drive circuit includes a power supply circuit connected to an anode of a laser diode to supply a variable voltage to the laser diode, and a drive current control circuit connected to a cathode of the laser diode to control a current of the laser diode. The power supply circuit generates a start-up voltage which is equal to the sum of the maximum drive voltage that is larger than the drive voltage and a predetermined first reference voltage, acquires a cathode voltage of the laser diode while the start-up voltage is generated, generates a voltage by lowering from the start-up voltage so as to diminish the difference between the acquired cathode voltage and the first reference voltage, and the first reference voltage is the minimum cathode voltage necessary to supply a predetermined current to the laser diode by the drive current control circuit.

Abstract translation: 激光二极管驱动电路包括连接到激光二极管的阳极以向激光二极管提供可变电压的电源电路，以及驱动电流控制电路，连接到激光二极管的阴极以控制激光二极管的电流 。 电源电路产生等于大于驱动电压的最大驱动电压和预定的第一参考电压之和的启动电压，获取激光二极管的阴极电压，而启动电压为 通过从启动电压降低而产生电压，从而减小所获取的阴极电压和第一参考电压之间的差异，并且第一参考电压是向激光二极管提供预定电流所需的最小阴极电压 由驱动电流控制电路。

公开(公告)号：US20130106326A1

公开(公告)日：2013-05-02

申请号：US13658109

申请日：2012-10-23

Applicant: Tomohiko Kamatani ,  Haruyuki Suzuki ,  Fumihiro Shimizu ,  Katsuhisa Furuse

Inventor： Tomohiko Kamatani ,  Haruyuki Suzuki ,  Fumihiro Shimizu ,  Katsuhisa Furuse

IPC: H02P6/16

CPC classification number: H02P6/16

Abstract: A motor drive controller to control a motor via multiple sensors includes a first phase detector to compare respective differential pairs of the sensor signals from the same sensor to detect phases of the rotor, and output a first phase information signal; a second phase detector to compare a respective one of the multiple sensor signals with another sensor signal from the different sensor to detect the phases and output a second phase information signal; a phase divider to divide the phases, detected by the first and second phase detectors, into multiple predetermined phase intervals; a signal selector to select one of the multiple sensor signals in the multiple predetermined phase intervals; and a third phase detector to detect whether the signal selected by the signal selector reaches a predetermined threshold level corresponding to a predetermined phase of the rotor, and output a third phase information signal.

Abstract translation: 用于通过多个传感器控制电动机的电动机驱动控制器包括第一相位检测器，用于比较来自同一传感器的传感器信号的各差分对以检测转子的相位，并输出第一相位信息信号; 第二相位检测器，用于将来自所述不同传感器的另一个传感器信号与所述多个传感器信号中的相应一个进行比较，以检测相位并输出第二相位信息信号; 相位分配器，用于将由第一和第二相位检测器检测的相位分成多个预定相位间隔; 信号选择器，用于选择多个预定相位间隔中的多个传感器信号之一; 以及第三相位检测器，用于检测由信号选择器选择的信号是否达到与转子的预定相位对应的预定阈值电平，并输出第三相位信息信号。

公开(公告)号：US20130099708A1

公开(公告)日：2013-04-25

申请号：US13649528

申请日：2012-10-11

Applicant: Fumihiro SHIMIZU ,  Haruyuki Suzuki ,  Tomohiko Kamatani ,  Katsuhisa Furuse

Inventor： Fumihiro SHIMIZU ,  Haruyuki Suzuki ,  Tomohiko Kamatani ,  Katsuhisa Furuse

IPC: H02P6/16 ,  G01B7/30

CPC classification number: H02P21/146 ,  G01D5/2451 ,  H02P21/18

Abstract: Disclosed is an angle detection device including plural sensors that output corresponding sinusoidal signals, wherein each of the sinusoidal signals varies sinusoidally depending on a rotational angle of a rotor of a motor, and each of the sinusoidal signals has a phase that depends on a position of the corresponding sensor; a vector generating unit that generates a vector represented by a result of mutually operating at least two of the sinusoidal signals; a vector rotation unit that rotates the vector by operating the vector and reference sine waves having corresponding phases; and an angle search unit that causes the vector rotation unit to sequentially rotate the vector until a phase of the vector becomes a predetermined phase, and that detects an angle between the vector prior to being rotated and the predetermined phase as the rotational angle of the rotor of the motor.

Abstract translation: 公开了一种角度检测装置，其包括输出相应的正弦信号的多个传感器，其中每个正弦信号根据电动机的转子的旋转角正弦变化，并且每个正弦信号具有取决于 相应的传感器; 矢量产生单元，其生成由相互操作所述正弦信号中的至少两个的结果表示的矢量; 矢量旋转单元，其通过操作具有相应相位的矢量和参考正弦波来旋转矢量; 以及角度搜索单元，其使所述向量旋转单元顺序旋转所述向量，直到所述向量的相位变为预定相位，并且检测所述向量在旋转之前的角度与所述预定相位之间的角度作为所述转子的旋转角度 的电机。