-
公开(公告)号：US5245524A
公开(公告)日：1993-09-14
申请号：US785819
申请日：1991-10-31
申请人： Shinichi Nakagawa , Hidenobu Ito
发明人： Shinichi Nakagawa , Hidenobu Ito
IPC分类号： H02M3/07
CPC分类号： H02M3/07
摘要： A DC-DC converter includes first and second capacitors coupled in parallel, a switching part for controlling the first and second capacitors so that the first capacitor is charged by an input voltage and the second capacitor is charged by a discharging of the first capacitor, an output voltage being obtained at one end of the second capacitor, and the switching part including a discharge path through which the second capacitor is discharged. An output voltage detection units detects the output voltage and determines whether or not the output voltage satisfies a predetermined condition. A discharge path breaking units breakes the discharge path when the output voltage detection unit determines that the output voltage satisfies the predetermined condition, so that the first capacitor is prevented from being discharged through discharge path.
摘要翻译： DC-DC转换器包括并联的第一和第二电容器，用于控制第一和第二电容器的开关部分，使得第一电容器被输入电压充电，并且第二电容器通过第一电容器的放电而被充电， 输出电压在第二电容器的一端获得，并且开关部分包括放电路径，第二电容器被放电通过该放电路径。 输出电压检测单元检测输出电压，并确定输出电压是否满足预定条件。 当输出电压检测单元确定输出电压满足预定条件时，放电路径断开单元破坏放电路径，从而防止第一电容器通过放电路径放电。
-
公开(公告)号：US06611132B2
公开(公告)日：2003-08-26
申请号：US10087852
申请日：2002-03-05
申请人： Shinichi Nakagawa , Hidenobu Ito
发明人： Shinichi Nakagawa , Hidenobu Ito
IPC分类号： G05F140
CPC分类号： H02M1/36 , H02M3/156 , H02M2001/0032 , H02M2001/0041 , Y02B70/16
摘要： A DC-DC converter for decreasing power consumption and quickly increasing an output voltage. The converter includes a voltage generation circuit, a switching control circuit, a current detection circuit, and a step control circuit. An output transistor performs switching to generate the output voltage of the switching control circuit. The current detection circuit is connected to the voltage generation circuit to detect a load current, which is derived from the output voltage, and to generate a detection signal. A stop control circuit maintains the output transistor in an activated state in accordance with the detection signal and stops the operation of the switching control circuit when the load current is less than or equal to the load current.
-
公开(公告)号：US5479088A
公开(公告)日：1995-12-26
申请号：US279105
申请日：1994-07-22
CPC分类号： H02M3/156 , H02M2001/0009
摘要： The DC-DC converter is disclosed, which has an output terminal connected to an external load, and produces a desired output voltage at the output terminal. An output capacitor in the converter has a first electrode connected to the output terminal and a second electrode. The charge/discharge regulator controls electrical connection between a DC power supply and the output capacitor to permit the capacitor to be charged or discharged. The DC-DC converter includes a first detecting circuit for detecting a change in the output voltage at the output terminal, and a second detecting circuit for detecting a variable load current flowing into the converter from the load via the output terminal. A voltage control circuit is provided in the converter, and controls a potential of the second electrode of the capacitor in such a manner as to nullify a variation in the output voltage, based on a result of detection of the output voltage by the first detecting circuit and on a result of detection of the load current by the second detecting circuit.
摘要翻译： 公开了一种DC-DC转换器，其具有连接到外部负载的输出端子，并且在输出端子处产生期望的输出电压。 转换器中的输出电容器具有连接到输出端子的第一电极和第二电极。 充电/放电调节器控制直流电源和输出电容器之间的电气连接，以允许电容器充电或放电。 DC-DC转换器包括用于检测输出端子处的输出电压变化的第一检测电路和用于检测经由输出端子从负载流入转换器的可变负载电流的第二检测电路。 在转换器中设置有电压控制电路，并且基于第一检测电路的输出电压的检测结果，以使得输出电压的变化无效的方式来控制电容器的第二电极的电位 并且由第二检测电路检测负载电流的结果。
-
公开(公告)号：US6163217A
公开(公告)日：2000-12-19
申请号：US292935
申请日：1999-04-16
CPC分类号： H03F3/3023 , H03F3/45183 , H03F2203/30021 , H03F2203/30036 , H03F2203/45508 , H03F2203/45658
摘要： A current charged into or discharged from a phase-compensating capacitor C1 in an output circuit is controlled by a level shift circuit so that the current is kept constant for input signals inputted to the input terminals IN+ and IN- of a differential amplifier circuit, and also a current charged into or discharged from a phase-compensating capacitor C2 is controlled by the current correcting circuit so that the current become equal to a constant current controlled by the level shift circuit, namely to a current charged into or discharged from the phase-compensating capacitor C1. Therefore, even if a quickly rising or falling signal is inputted into the differential amplifier circuit, the MOS transistor MP11 or MN11 is not set in an offset state, which prevents generation of an overshoot or an undershot in the output terminal.
摘要翻译： 通过电平移位电路来控制在输出电路中充入或从相位补偿电容器C1放电的电流，使得电流对于输入到差分放大器电路的输入端IN +和IN-的输入信号保持恒定，以及 另外，由电流校正电路控制充电到相位补偿电容器C2的放电电流，也可以由电平移位电路控制的电流变为等于从相位补偿电容器C2充放电的电流， 补偿电容器C1。 因此，即使快速上升或下降信号被输入到差分放大器电路中，MOS晶体管MP11或MN11也不被设置在偏移状态，这防止了在输出端子中产生过冲或欠压。
-
公开(公告)号：US08856554B2
公开(公告)日：2014-10-07
申请号：US13407929
申请日：2012-02-29
申请人： Kouichi Yasaki , Hidenobu Ito , Yousuke Nakamura , Kazuaki Nimura , Zhaogong Guo
发明人： Kouichi Yasaki , Hidenobu Ito , Yousuke Nakamura , Kazuaki Nimura , Zhaogong Guo
CPC分类号： G06F1/26 , G06F21/80 , G06F21/88 , G06F2221/2107 , G06F2221/2143
摘要： An information terminal includes: a storage unit to store information; a data encryption unit to encrypt the information and decrypt the encrypted information using an encryption key; a pre-deletion unit to delete the encryption key; a signal detection unit to detect an interruption signal; a pre-deletion setting unit to instruct the pre-deletion unit to delete the encryption key in response to the detection of the interruption signal; and a deletion stop unit to stop deletion of the encryption key by the pre-deletion unit.
摘要翻译： 信息终端包括：存储单元，用于存储信息; 数据加密单元，用于加密信息并使用加密密钥解密加密信息; 用于删除加密密钥的预删除单元; 信号检测单元，用于检测中断信号; 预删除设置单元，用于响应于所述中断信号的检测指示所述预删除单元删除所述加密密钥; 以及删除停止单元，用于停止通过预删除单元的加密密钥的删除。
-
公开(公告)号：US08476881B2
公开(公告)日：2013-07-02
申请号：US12778812
申请日：2010-05-12
申请人： Toshihiko Kasai , Hidenobu Ito
发明人： Toshihiko Kasai , Hidenobu Ito
摘要： A power control device for performing switching control for an output voltage of a power supply device includes a signal generation circuit for comparing a difference between a value of the output voltage and a value of a first reference voltage with a value of a second reference voltage, and for stopping the switching control when a value of the difference is less than or equal to the value of the second reference voltage, and an adjuster circuit for adjusting the second reference voltage based on a ratio between a value of an input voltage and the value of the output voltage.
-
公开(公告)号：US20120254637A1
公开(公告)日：2012-10-04
申请号：US13407929
申请日：2012-02-29
申请人： Kouichi YASAKI , Hidenobu Ito , Yousuke Nakamura , Kazuaki Nimura , Zhaogong Guo
发明人： Kouichi YASAKI , Hidenobu Ito , Yousuke Nakamura , Kazuaki Nimura , Zhaogong Guo
CPC分类号： G06F1/26 , G06F21/80 , G06F21/88 , G06F2221/2107 , G06F2221/2143
摘要： An information terminal includes: a storage unit to store information; a data encryption unit to encrypt the information and decrypt the encrypted information using an encryption key; a pre-deletion unit to delete the encryption key; a signal detection unit to detect an interruption signal; a pre-deletion setting unit to instruct the pre-deletion unit to delete the encryption key in response to the detection of the interruption signal; and a deletion stop unit to stop deletion of the encryption key by the pre-deletion unit.
摘要翻译： 信息终端包括：存储单元，用于存储信息; 数据加密单元，用于加密信息并使用加密密钥解密加密信息; 用于删除加密密钥的预删除单元; 信号检测单元，用于检测中断信号; 预删除设置单元，用于响应于所述中断信号的检测指示所述预删除单元删除所述加密密钥; 以及删除停止单元，用于停止通过预删除单元的加密密钥的删除。
-
8.发明申请POWER SUPPLY CIRCUIT, OVERCURRENT PROTECTION CIRCUIT FOR THE SAME, AND ELECTRONIC DEVICE 有权电源电路，相同的过电流保护电路和电子设备公开(公告)号：US20090201618A1
公开(公告)日：2009-08-13
申请号：US12369907
申请日：2009-02-12
IPC分类号： H02H9/08
CPC分类号： G05F1/573 , H03K17/0822
摘要： A power supply circuit includes an output transistor including a source coupled to power supply voltage, and a drain from which output voltage is outputted; a first error amplifier powered by the power supply voltage and outputting a signal based on a potential difference between the output voltage and a reference voltage; a buffer transistor including a gate coupled to the output of the first error amplifier, and a source coupled via a constant current source to the power supply voltage and coupled to a gate of the output transistor; a current detection transistor coupled to the output transistor such that a gate and source are shared; and an overcurrent protection circuit configured to limit the drain current of the buffer transistor based on the increase of the drain current of the current detection transistor and thereby control the output current of the output transistor.
摘要翻译： 电源电路包括：输出晶体管，其包括耦合到电源电压的源极和从其输出输出电压的漏极; 由所述电源电压供电的第一误差放大器，并且基于所述输出电压和参考电压之间的电位差输出信号; 缓冲晶体管，其包括耦合到所述第一误差放大器的输出的栅极，以及经由恒定电流源耦合到所述电源电压并耦合到所述输出晶体管的栅极的源极; 耦合到输出晶体管的电流检测晶体管，使得门和源被共享; 以及过电流保护电路，其被配置为基于电流检测晶体管的漏极电流的增加来限制缓冲晶体管的漏极电流，从而控制输出晶体管的输出电流。
-
公开(公告)号：US20090051339A1
公开(公告)日：2009-02-26
申请号：US12257222
申请日：2008-10-23
IPC分类号： G05F1/618
CPC分类号： H02M1/38 , H03K2017/307
摘要： A DC-DC converter prevents through current from flowing in an output transistor. A first transistor receives an input voltage. A second transistor is connected to the first transistor. A comparator is connected to the second transistor. The comparator detects current flowing through a choke coil based on the potential difference between two terminals of the second transistor to generate a switching control signal for turning the second transistor on and off. The second transistor and the comparator form an ideal diode. A control circuit of the DC-DC converter generates an activation signal for turning the first transistor on and off based on a pulse signal to keep an output voltage constant. A through current prevention pulse generation circuit generates a pulse signal for turning off the second transistor from before the first transistor is turned on to after the first transistor is turned on.
摘要翻译： DC-DC转换器防止直流电流流入输出晶体管。 第一晶体管接收输入电压。 第二晶体管连接到第一晶体管。 比较器连接到第二晶体管。 比较器基于第二晶体管的两个端子之间的电位差来检测流过扼流线圈的电流，以产生用于使第二晶体管接通和关断的开关控制信号。 第二个晶体管和比较器构成一个理想的二极管。 DC-DC转换器的控制电路基于脉冲信号产生用于使第一晶体管导通和截止的激活信号，以保持输出电压恒定。 通过电流防止脉冲产生电路在第一晶体管导通之后到第一晶体管导通之后产生用于使第二晶体管截止的脉冲信号。
-
10.发明授权Early effect cancelling circuit, differential amplifier, linear regulator, and early effect canceling method 有权早期效应消除电路，差分放大器，线性稳压器和早期效应消除方法公开(公告)号：US07352163B2
公开(公告)日：2008-04-01
申请号：US11132172
申请日：2005-05-19
CPC分类号： G05F1/575 , H03F3/345 , H03F3/45273 , H03F2200/303 , H03F2200/91
摘要： In an input transistor of current mirror circuit, it is intended to prevent the current generated by Early effects from appearing in the output current of the current mirror circuit. Having an Early voltage detector 22 of same connection and structure as a driver circuit 21, and connected in parallel to the driver circuit 21, the current flowing in input transistor Q9 of the Early voltage detector 22 is detected. Output current (current IQ11) of Early voltage detector 22 is added to input current (current IQ5) of driver circuit 21. As a result, in input current (current IQ7) of current mirror circuit 25, current α due to Early voltage effects can be canceled. At the same time, current α due to Early voltage effects generated in input transistor Q5 of current mirror circuit 25 is prevented from appearing in output current (current IQ8) of current mirror circuit 25.
摘要翻译： 在电流镜电路的输入晶体管中，旨在防止由早期效应产生的电流出现在电流镜电路的输出电流中。 具有与驱动电路21相同的连接和结构的早期电压检测器22并且并联连接到驱动器电路21，检测在早期电压检测器22的输入晶体管Q 9中流动的电流。 早期电压检测器22的输出电流（电流IQ11）被加到驱动电路21的输入电流（电流IQ 5）。 结果，在电流镜电路25的输入电流（电流IQ 7）中，可以消除由于早期电压效应引起的电流α。 同时，由于电流镜电路25的输入晶体管Q 5中产生的早期电压效应的电流α被防止出现在电流镜电路25的输出电流（电流IQ 8）中。
-
-
-
-
-
-
-
-
-
搜索结果
66 条记录 (耗时 0.019 秒)
