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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
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.
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公开(公告)号：US20170219951A1
公开(公告)日：2017-08-03
申请号：US15405705
申请日：2017-01-13
Applicant: Tomohiko KAMATANI
Inventor： Tomohiko KAMATANI
CPC classification number: G03G15/043 , G03G15/04072 , H04N1/295 , H04N1/40031 , H04N1/40037 , H04N1/4015
Abstract: A semiconductor laser driver and an image forming apparatus incorporating the semiconductor laser driver. The semiconductor laser driver includes a light source including a plurality of laser-beam source units disposed in a sub-scanning direction that serves as a group direction, the laser-beam source units having a plurality of groups arranged in a main scanning direction, each of the laser-beam source units emitting a laser beam of a light quantity dependent upon a driving current, a shading corrector to correct, according to at least one shading correction value, the driving current given to the laser-beam source units for each of the groups, and a light quantity adjuster to adjust the driving current according to a light-quantity adjustment value for the laser-beam source units. The image forming apparatus includes a semiconductor laser drive circuit, and the semiconductor laser driver that serves as the semiconductor laser driver.
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3.发明申请PHASE DETECTOR, MOTOR DRIVE CONTROLLER, MOTOR DEVICE, AND METHOD OF DETECTING PHASE OF ROTOR 有权相位检测器，电动机驱动控制器，电机装置及检测转子相位的方法公开(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
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。
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4.发明授权Semiconductor laser driving device and image forming apparatus having the semiconductor laser driving device 有权具有半导体激光驱动装置的半导体激光驱动装置和图像形成装置公开(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。
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5.发明授权Voltage comparison circuit, and semiconductor integrated circuit and electronic device having the same 有权电压比较电路，以及具有这种电路的半导体集成电路和电子器件公开(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。
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Patent Agency Ranking
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。
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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
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.
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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
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.
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9.发明申请公开(公告)号：US20180041148A1
公开(公告)日：2018-02-08
申请号：US15656110
申请日：2017-07-21
Applicant: Tomohiko KAMATANI
Inventor： Tomohiko KAMATANI
CPC classification number: H02P6/14 , G01R31/343 , H02K11/20 , H02P6/16
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.
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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
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。
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