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    • 1. 发明授权
    • Overcharge prevention circuit and semiconductor device
    • 过充电防止电路和半导体器件
    • US08988840B2
    • 2015-03-24
    • US13612130
    • 2012-09-12
    • Makoto MitaniKotaro Watanabe
    • Makoto MitaniKotaro Watanabe
    • H02H3/20H02H9/04H02J7/00
    • H02J7/00H02J7/0029H02J2007/0037Y02E10/566
    • Provided is an overcharge prevention circuit for clamping a voltage value of an electric power generation unit in an overcharged state to a constant value, in which the number of elements is small and which does not consume electric power unnecessarily. The overcharge prevention circuit includes: a backflow prevention diode; a clamping transistor having a gate connected to a cathode of the backflow prevention diode, a source connected to an anode thereof, and a drain connected to an overcharge prevention switch. Upon detection of overcharge, a current is discharged via the clamping transistor and the overcharge prevention switch, thereby clamping a potential of the electric power generation unit to around a voltage of an electricity storage unit.
    • 提供了一种过充电防止电路,用于将过充电状态的发电单元的电压值钳位到元件数量少且不消耗电力的恒定值。 过充电防止电路包括:防回流二极管; 钳位晶体管,其具有连接到防逆二极管的阴极的栅极,连接到其阳极的源极和连接到过充电保护开关的漏极。 当检测到过充电时,通过钳位晶体管和过充电保护开关放电,从而将发电单元的电位钳位在蓄电单元的电压附近。
    • 2. 发明授权
    • Oscillation device
    • 振荡装置
    • US08766737B2
    • 2014-07-01
    • US13612217
    • 2012-09-12
    • Masaya MurataKotaro WatanabeMakoto Mitani
    • Masaya MurataKotaro WatanabeMakoto Mitani
    • H03L1/02H03B5/04
    • G05F1/567
    • A constant voltage circuit which can realize a low consumption current, and a crystal oscillation circuit using the constant voltage circuit. The constant voltage circuit is provided with a temperature characteristic regulation element, in order to minimize a difference between a negative slope of a voltage response of a constant voltage to a temperature change and a negative slope of a voltage response of the smallest operation voltage that can oscillate in the crystal oscillation circuit to the temperature change, so that the consumption current of the crystal oscillation circuit is decreased. When the constant current generated by the constant voltage circuit is decreased, the consumption current of the constant voltage circuit is decreased, and the consumption current of the whole oscillation device is decreased.
    • 可以实现低功耗电流的恒压电路和使用恒压电路的晶体振荡电路。 恒压电路设置有温度特性调节元件,以便最小化恒定电压的电压响应的负斜率与温度变化的负斜率与最小工作电压的电压响应的负斜率之间的差异 在晶体振荡电路中振荡到温度变化,使得晶体振荡电路的消耗电流降低。 当由恒压电路产生的恒定电流减小时,恒压电路的消耗电流降低,整个振荡器件的消耗电流降低。
    • 3. 发明申请
    • VALVE TIMING CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE
    • 内燃机的时间控制装置
    • US20120017857A1
    • 2012-01-26
    • US13080239
    • 2011-04-05
    • Hiroyuki KATOSeiji TsurutaKotaro WatanabeYoshinori Ichinosawa
    • Hiroyuki KATOSeiji TsurutaKotaro WatanabeYoshinori Ichinosawa
    • F01L1/344
    • F02D13/0219F01L1/3442F01L2001/3443F01L2001/34433F01L2001/34453F01L2001/34459F01L2001/34469F02D2013/0292Y02T10/18
    • A valve timing control device comprises a drive rotation member driven by a crankshaft of an internal combustion engine; a driven rotation member fixed to a camshaft that actuates engine valves to open and close, the drive rotation member and driven rotation member being coaxially arranged to make a relative rotation therebetween; a phase varying mechanism that rotates the driven rotation member relative to the drive rotation member within a given angle, the phase varying mechanism being able to cause the driven rotation member to take the most-retarded phase position, the most-advanced phase position and a middle phase position defined between the most-retarded phase position and the most-advanced phase position; and a position keeping mechanism that is able to keep the driven rotation member at least the most-retarded phase position and the middle phase position at the time of starting the engine, and is able to select one of the most-retarded phase position and the middle phase position in accordance with an operation condition of the engine.
    • 气门正时控制装置包括由内燃机的曲轴驱动的驱动旋转构件; 固定在凸轮轴上的从动旋转构件,其驱动发动机气门打开和关闭,所述驱动旋转构件和从动旋转构件同轴布置以在其间进行相对旋转; 相变机构,其使从动旋转构件相对于驱动旋转构件在给定角度内旋转,所述相变机构能够使从动旋转构件采取最延迟的相位位置,最前进的相位位置和 在最相位位置和最高级相位之间定义的中间位置; 以及位置保持机构,其能够将从动旋转构件保持在起动发动机时的至少最延迟的相位位置和中间相位置,并且能够选择最延迟的相位位置和 根据发动机的运转状态的中间位置。
    • 4. 发明申请
    • MEMORY CIRCUIT AND VOLTAGE DETECTION CIRCUIT INCLUDING THE SAME
    • 存储器电路和电压检测电路,包括它们
    • US20110032776A1
    • 2011-02-10
    • US12847147
    • 2010-07-30
    • Kotaro WatanabeTomohiro OkaTeruo Suzuki
    • Kotaro WatanabeTomohiro OkaTeruo Suzuki
    • G11C5/14
    • G11C5/143
    • Provided are a memory circuit having a small circuit scale and a voltage detection circuit including the memory circuit. An NMOS transistor (21) is in an off state during loading and writing and is in an on state during reading. An NMOS transistor (22) is turned on when a high level input is received and turned off when a low level input is received. An NMOS transistor (23) is in the off state during loading and writing and is in the on state during reading. A PMOS transistor (26) is in the on state during loading and is in the off state during writing and reading. A PMOS transistor (27) is turned off when the high level input is received during loading, is turned on when the low level input is received during loading, and is in the on state during writing and reading.
    • 提供具有小电路规模的存储电路和包括存储电路的电压检测电路。 NMOS晶体管(21)在加载和写入期间处于截止状态,并且在读取期间处于导通状态。 当接收到高电平输入时,NMOS晶体管(22)导通,当接收到低电平输入时,NMOS晶体管截止。 NMOS晶体管(23)在加载和写入期间处于截止状态,并且在读取期间处于导通状态。 PMOS晶体管(26)在加载期间处于导通状态,并且在写入和读取期间处于关闭状态。 当加载期间接收到高电平输入时,PMOS晶体管(27)截止,在加载期间接收到低电平输入时导通,并且在写入和读取期间处于导通状态。
    • 9. 发明申请
    • Oscillation circuit
    • 振荡电路
    • US20080211593A1
    • 2008-09-04
    • US12070210
    • 2008-02-15
    • Yutaka SatoKotaro Watanabe
    • Yutaka SatoKotaro Watanabe
    • H03B5/32
    • H03B5/32
    • Provided is an oscillation circuit capable of obtaining a plurality of oscillation frequencies using a single oscillation resonator. The oscillation circuit includes the oscillation resonator, an oscillation inverter, a dumping resister connected between an output of the oscillation inverter and an output terminal, a feedback resistor connected with input and output of the oscillation inverter, and a feedback resistor switch for varying a feedback resistance value or an oscillation inverter switch for varying a mutual conductance value of the oscillation inverter. When the feedback resistance value or the mutual conductance value of the oscillation inverter is varied by the feedback resistor switch or the oscillation inverter switch, a frequency band of the oscillation circuit is adjusted to select a harmonic component of the oscillation resonator. Therefore, an oscillation frequency can be switched, so it is possible to obtain a plurality of oscillation frequencies using a single oscillation resonator.
    • 提供了能够使用单个振荡谐振器获得多个振荡频率的振荡电路。 振荡电路包括振荡谐振器,振荡逆变器,连接在振荡逆变器的输出端和输出端子之间的反馈电阻器,与振荡逆变器的输入和输出相连的反馈电阻器,以及用于改变反馈的反馈电阻器开关 电阻值或用于改变振荡逆变器的互导值的振荡逆变器开关。 当通过反馈电阻器开关或振荡逆变器开关来改变振荡逆变器的反馈电阻值或互导值时,调整振荡电路的频带以选择振荡谐振器的谐波分量。 因此,可以切换振荡频率,因此可以使用单个振荡谐振器获得多个振荡频率。