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    • 12. 发明授权
    • Head amplifier circuit
    • 头放大器电路
    • US06411455B1
    • 2002-06-25
    • US09038075
    • 1998-03-11
    • Yukihiro TeradaAkira Ikeuchi
    • Yukihiro TeradaAkira Ikeuchi
    • G11B502
    • G11B5/02G11B5/016H03F3/72
    • A head amplifier circuit supplies a writing current, having a direction in accordance with recording information, to a head for recording information on a recording medium. The head amplifier circuit includes a reference voltage generating portion for generating a reference voltage, a constant current generating portion for generating a constant current based on the reference voltage generated by the reference voltage generating portion, and a grounding portion. During one period of time, the constant current generating portion supplies the constant current to a first end of the head and the grounding portion grounds a second end of the head. During another period of time, the constant current generating portion supplies the constant current to the second end of the head and the grounding portion grounds the first end of the head.
    • 头放大器电路将具有根据记录信息的方向的写入电流提供到用于在记录介质上记录信息的磁头。 头放大器电路包括用于产生参考电压的参考电压产生部分,用于基于由参考电压产生部分产生的参考电压产生恒定电流的恒流产生部分和接地部分。 在一段时间内,恒流产生部分将恒定电流提供给磁头的第一端,接地部分接地磁头的第二端。 在另一时间段期间,恒流产生部分将恒定电流提供给头部的第二端,并且接地部分接地头部的第一端。
    • 13. 发明授权
    • Secondary battery cell protection circuit
    • 二次电池单体保护电路
    • US06297619B1
    • 2001-10-02
    • US09393895
    • 1999-09-10
    • Yukihiro Terada
    • Yukihiro Terada
    • H02J700
    • H02J7/0031H02J2007/0037H02J2007/004
    • A secondary battery cell protection circuit protects a charge control FET, a discharge control FET, and a secondary battery cell from destruction due to use of a charger of greater than rated voltage to charge the secondary battery cell. The secondary battery cell protection circuit has a charger voltage detection circuit, a first charge circuit control circuit for cutting off a charge circuit when the charger voltage detection circuit detects a charger voltage in excess of a predetermined value, and a second charge control circuit for cutting off a charge circuit when the over-charge detection circuit detects a secondary battery cell charge voltage in excess of a predetermined value. When the charge control FET is OFF, a load voltage proportionate to the charge voltage of the charger appears at a −B terminal and is applied to the emitter of a transistor, activating the transistor. A current proportionate to the charge voltage of the charger then flows to the transistor. If at this time the charger voltage is above the rated voltage, then a resistor is set so that a voltage drop of the resistor exceeds a base voltage. As a result, when the charger voltage is above the rated voltage the charge voltage of the secondary battery cell declines thereafter and a charge control FET drive transistor remains in an OFF state even after the charge voltage is at or below a release charge voltage.
    • 二次电池单元保护电路保护充电控制FET,放电控制FET和二次电池单元免受使用大于额定电压的充电器的破坏,以对二次电池单元充电。 二次电池单元保护电路具有充电器电压检测电路,当充电器电压检测电路检测到超过预定值的充电器电压时,用于切断充电电路的第一充电电路控制电路和用于切断充电电压的第二充电控制电路 当过充电检测电路检测到超过预定值的二次电池单元充电电压时,关闭充电电路。 当充电控制FET为OFF时,与B充电器的充电电压成比例的负载电压出现在-B端子处,并施加到晶体管的发射极,激活晶体管。 与充电器的充电电压成比例的电流然后流到晶体管。 如果此时充电器电压高于额定电压,则设置电阻器使得电阻器的电压降超过基极电压。 结果,当充电器电压高于额定电压时,二次电池单元的充电电压此后下降,并且充电控制FET驱动晶体管即使在充电电压处于或低于释放充电电压之后也保持在截止状态。
    • 14. 发明授权
    • Motor driving circuit
    • 电机驱动电路
    • US6104150A
    • 2000-08-15
    • US46825
    • 1998-03-24
    • Tomomitsu OoharaYukihiro Terada
    • Tomomitsu OoharaYukihiro Terada
    • H02P6/00H02P6/08H02P7/06H02P8/00
    • H02P6/08H02P6/28
    • A motor driving circuit controls driving currents to be supplied to stator coils of a plurality of phases so as to supply the driving currents to the stator coils in sequence so as to generate a rotating magnetic field. The interaction between the rotating magnetic field generated by the stator coils and a magnetic field generated by a magnet of a rotor causes the rotor to rotate with respect to the stator coils. The motor driving circuit includes a driving circuit for supplying the driving currents to the stator coils, respectively; and a preventing circuit for preventing the driving means from supplying the driving currents to the stator coils in sequence.
    • 电动机驱动电路控制供给多相的定子线圈的驱动电流,以便依次向定子线圈提供驱动电流,以产生旋转磁场。 由定子线圈产生的旋转磁场与由转子的磁体产生的磁场之间的相互作用使转子相对于定子线圈旋转。 马达驱动电路包括分别向定子线圈提供驱动电流的驱动电路; 以及用于防止驱动装置依次向定子线圈提供驱动电流的防止电路。
    • 15. 发明授权
    • Headphone stereo control circuit
    • 耳机立体声控制电路
    • US5850459A
    • 1998-12-15
    • US879634
    • 1997-06-20
    • Hideaki AdachiYukihiro Terada
    • Hideaki AdachiYukihiro Terada
    • G11B15/00H04R5/033H04R5/04H04R1/10
    • H04R5/04H04R5/033
    • A headphone stereo control circuit includes a pre-power amplifier IC 1 wherein a motor speed control circuit 2, a motor driving transistor 3, a pre-amplifier 4 and a main amplifier 5 are mounted. In the headphone stereo control circuit, a headphone motor 6 is connected to the motor output pin P1of the motor driving transistor 3; a stereo head to the stereo head input pin P2 of the pre-amplifier 4; a tuner circuit 8 to the tuner input pin P3 of the main amplifier 5; and a speaker 9 to the main amplifier output pin P4 of the main amplifier 5. Further, a pin P8 for common use in effecting pre-amplifier.speed control is provided, the pin for common use being capable of applying supply voltage simultaneously to the motor speed control circuit 2 and the pre-amplifier 4, so that the supply voltage is supplied via a single-pole change-over switch 12 to the pin P8 for common use in effecting pre-amplifier.speed control.
    • 耳机立体声控制电路包括其中安装有电动机速度控制电路2,电动机驱动晶体管3,前置放大器4和主放大器5的前置功率放大器IC 1。 在耳机立体声控制电路中,耳机电动机6连接到电动机驱动晶体管3的电动机输出销P1; 立体声头到前置放大器4的立体声头输入引脚P2; 调谐器电路8连接到主放大器5的调谐器输入引脚P3; 以及扬声器9连接到主放大器5的主放大器输出引脚P4。此外,提供用于实现前置放大器速度控制的通用引脚P8,用于常用的引脚能够同时向 电机速度控制电路2和前置放大器4,使得电源电压通过单极转换开关12提供给引脚P8,以用于实现前置放大器速度控制。
    • 17. 发明授权
    • Battery protecting apparatus and battery protecting circuit
    • 电池保护装置和电池保护电路
    • US07598708B2
    • 2009-10-06
    • US11512690
    • 2006-08-30
    • Daisuke KimuraYukihiro Terada
    • Daisuke KimuraYukihiro Terada
    • H02J7/00H02H3/00
    • H02J7/0031
    • A battery protecting circuit is disclosed that includes a negative voltage terminal voltage detecting circuit that detects when a voltage of a negative voltage terminal decreases to less than a predetermined voltage; an abnormality detecting circuit that detects an abnormality in charge/discharge conditions of a battery; a switch that is connected between the battery and the negative voltage terminal, the switch being turned off when the negative voltage terminal voltage detecting circuit detects that the voltage of the negative voltage terminal has decreased to less than the predetermined voltage and when the abnormality detecting circuit detects the abnormality in the charge/discharge conditions of the battery; a delay time reducing circuit that reduces a time period from a time the abnormality in the charge/discharge conditions of the battery is detected to a time the switch is turned off when the voltage of the negative voltage terminal decreases to less than the predetermined voltage; and an output invalidating circuit that invalidates an output of the negative voltage terminal voltage detecting circuit.
    • 公开了一种电池保护电路,其包括负电压端子电压检测电路,其检测负电压端子的电压何时降低到小于预定电压; 异常检测电路,其检测电池的充放电状态的异常; 连接在电池和负电压端子之间的开关,当负电压端子电压检测电路检测到负电压端子的电压已经降低到小于预定电压时,开关被断开,并且当异常检测电路 检测电池的充放电状态的异常; 延迟时间减少电路,其在从负电压端子的电压下降到小于预定电压时,从电池的充电/放电状态的异常被检测到开关断开的时间减少时间段; 以及使负电压端子电压检测电路的输出无效的输出无效电路。
    • 18. 发明申请
    • Relative Positioning Method and Relative Positioning System Using Satellite
    • 卫星相对定位方法及相对定位系统
    • US20080284645A1
    • 2008-11-20
    • US11666254
    • 2004-10-29
    • Yukihiro TeradaKeiji ItoTakenori AbeTakashi Fujita
    • Yukihiro TeradaKeiji ItoTakenori AbeTakashi Fujita
    • G01S5/14
    • G01S19/51G01S19/04G01S19/14G01S19/35G01S19/43
    • A positioning system wherein radio waves from a GPS satellite (4) are received by a reference station (1), the absolute position of which is already known, and a plurality of mobile stations (3) to perform relative positioning among particular stations, thereby determining the positions of the mobile stations (3). At least one of the mobile stations (3) is disposed such that a baseline limit length allowing relative positioning relative to the reference station (1) is exceeded, and the intervals between particular mobile stations (3) are shorter than the baseline limit length allowing relative positioning. Each of the stations (1, 3) is equipped with a GPS receiver (11, 21) that receives the radio waves from the GPS satellite (4), and further equipped with a wireless communication apparatus (12, 22) that transmits/receives data to/from a particular station. There are provided a relative position calculation part (32) for calculating the relative position between the particular stations; and an absolute position calculation part (33) for determining, based on an absolute position of one station that performs a relative positioning, an absolute position of the other station.
    • 一种定位系统,其中来自GPS卫星(4)的无线电波被其绝对位置已知的参考站(1)接收,并且多个移动站(3)在特定站点之间执行相对定位,从而 确定移动台(3)的位置。 移动站(3)中的至少一个被布置成使得允许允许相对于参考站(1)的相对定位的基线限制长度,并且特定移动站(3)之间的间隔比基线限制长度短,允许 相对定位 每个站(1,3)配备有从GPS卫星(4)接收无线电波的GPS接收机(11,21),并且还配备有发送/接收的无线通信装置(12,22) 来往/来自特定车站的数据。 提供了用于计算特定站之间的相对位置的相对位置计算部分(32) 以及用于基于执行相对定位的一个站的绝对位置确定另一个站的绝对位置的绝对位置计算部分(33)。
    • 19. 发明申请
    • Relative Measuring Method and Relative Measuring System Using Satellite
    • 卫星相对测量方法及相对测量系统
    • US20070264970A1
    • 2007-11-15
    • US11666256
    • 2004-10-29
    • Yukihiro TeradaKeiji ItoTakenori AbeTakashi Fujita
    • Yukihiro TeradaKeiji ItoTakenori AbeTakashi Fujita
    • H04M11/00
    • G01S5/0289G01S19/04G01S19/14G01S19/51
    • A measuring system wherein radio waves from a GPS satellite (4) are received by a reference station (1) and a plurality of mobile stations (3) to perform relative measuring among particular stations, thereby measuring the shift amounts of the mobile stations (3). At least one of the mobile stations (3) is disposed such that a baseline limit length allowing relative measuring relative to the reference station (1) is exceeded, and the intervals between particular mobile stations (3) are shorter than the baseline limit length allowing relative measuring. Each of the stations (1, 3) is equipped with a GPS receiver (11, 21) that receives the radio waves from the GPS satellite (4), and further equipped with a wireless communication apparatus (12, 22) that transmits/receives data to/from a particular station. There are provided a relative shift amount calculation part (32) for calculating the relative shift amount between the particular stations; and a reference relative-shift-amount calculation part (33) for determining, based on a reference relative-shift-amount of one station that performs a relative measuring, a reference relative-shift-amount of the other station.
    • 一种测量系统,其中来自GPS卫星(4)的无线电波被参考站(1)和多个移动站(3)接收以在特定站之间执行相对测量,从而测量移动站(3)的移位量 )。 移动站(3)中的至少一个被布置成使得允许相对于参考站(1)允许相对测量的基线限制长度被超过,并且特定移动台(3)之间的间隔比基线限制长度短 相对测量。 每个站(1,3)配备有从GPS卫星(4)接收无线电波的GPS接收机(11,21),并且还配备有发送/接收的无线通信装置(12,22) 来往/来自特定车站的数据。 提供了用于计算特定站点之间的相对移动量的相对偏移量计算部分(32) 以及用于基于执行相对测量的一个站的参考相对偏移量来确定另一站的参考相对偏移量的参考相对偏移量计算部(33)。