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1. 发明申请

US20090115382A1 LINEAR REGULATOR CIRCUIT, LINEAR REGULATION METHOD AND SEMICONDUCTOR DEVICE 有权
标题翻译：线性调节器电路，线性调节方法和半导体器件
公开(公告)号：US20090115382A1
公开(公告)日：2009-05-07
申请号：US12255356
申请日：2008-10-21
申请人： Morihito HASEGAWA , Hidenobu Ito , Kwok Fai Hui , Yat Fong Yung
发明人： Morihito HASEGAWA , Hidenobu Ito , Kwok Fai Hui , Yat Fong Yung
IPC分类号： G05F1/00
CPC分类号： G05F1/575
摘要： According to one aspect of the embodiment, a linear regulator circuit includes an output transistor outputting an output current based on a input voltage, an error amplifier outputting a control signal based on an electric potential difference between an output voltage based on the output current and a reference voltage, a buffer circuit coupled between the error amplifier and the output transistor, and a drive capability adjustment circuit adjusting a load drive capability of the buffer circuit in synchronization with the output current.
摘要翻译：根据本实施例的一个方面，线性调节器电路包括输出晶体管，其基于输入电压输出输出电流;误差放大器，基于输出电流的输出电压和基于输出电流的电位差输出控制信号; 参考电压，耦合在误差放大器和输出晶体管之间的缓冲电路，以及与输出电流同步地调节缓冲电路的负载驱动能力的驱动能力调整电路。

2. 发明授权

US08760133B2 Linear drop-out regulator circuit 有权
标题翻译：线性掉电稳压电路
公开(公告)号：US08760133B2
公开(公告)日：2014-06-24
申请号：US12255356
申请日：2008-10-21
申请人： Morihito Hasegawa , Hidenobu Ito , Kwok Fai Hui , Yat Fong Yung
发明人： Morihito Hasegawa , Hidenobu Ito , Kwok Fai Hui , Yat Fong Yung
IPC分类号： G05F1/40
CPC分类号： G05F1/575
摘要： According to one aspect of the embodiment, a linear regulator circuit includes an output transistor outputting an output current based on a input voltage, an error amplifier outputting a control signal based on an electric potential difference between an output voltage based on the output current and a reference voltage, a buffer circuit coupled between the error amplifier and the output transistor, and a drive capability adjustment circuit adjusting a load drive capability of the buffer circuit in synchronization with the output current.
摘要翻译：根据本实施例的一个方面，线性调节器电路包括输出晶体管，其基于输入电压输出输出电流;误差放大器，基于输出电流的输出电压和基于输出电流的电位差输出控制信号; 参考电压，耦合在误差放大器和输出晶体管之间的缓冲电路，以及与输出电流同步地调节缓冲电路的负载驱动能力的驱动能力调整电路。

3. 发明授权

US08203817B2 Power supply circuit, overcurrent protection circuit for the same, and electronic device 有权
公开(公告)号：US08203817B2
公开(公告)日：2012-06-19
申请号：US12369907
申请日：2009-02-12
申请人： Morihito Hasegawa , Hidenobu Ito , Kwok Fai Hui , Toshihiko Kasai , Katsuyuki Yasukouchi
发明人： Morihito Hasegawa , Hidenobu Ito , Kwok Fai Hui , Toshihiko Kasai , Katsuyuki Yasukouchi
IPC分类号： H02H9/08
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.

4. 发明申请

US20090201618A1 POWER SUPPLY CIRCUIT, OVERCURRENT PROTECTION CIRCUIT FOR THE SAME, AND ELECTRONIC DEVICE 有权
标题翻译：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
申请人： Morihito Hasegawa , Hidenobu Ito , Kwok Fai Hui , Toshihiko Kasai , Katsuyuki Yasukouchi
发明人： Morihito Hasegawa , Hidenobu Ito , Kwok Fai Hui , Toshihiko Kasai , Katsuyuki Yasukouchi
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。

5. 发明授权

US08233257B2 Power supply circuit, overcurrent protection circuit for the same, and electronic device 有权
标题翻译：电源电路，过流保护电路相同，电子设备
公开(公告)号：US08233257B2
公开(公告)日：2012-07-31
申请号：US12369907
申请日：2009-02-12
申请人： Morihito Hasegawa , Hidenobu Ito , Kwok Fai Hui , Toshihiko Kasai , Katsuyuki Yasukouchi
发明人： Morihito Hasegawa , Hidenobu Ito , Kwok Fai Hui , Toshihiko Kasai , Katsuyuki Yasukouchi
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。

6. 发明授权

US07777473B2 DC-DC converter and control circuit for DC-DC converter 有权
标题翻译： DC-DC转换器和DC-DC转换器的控制电路
公开(公告)号：US07777473B2
公开(公告)日：2010-08-17
申请号：US12257222
申请日：2008-10-23
申请人： Morihito Hasegawa , Chikara Tsuchiya , Hidenobu Ito
发明人： Morihito Hasegawa , Chikara Tsuchiya , Hidenobu Ito
IPC分类号： G05F1/575 , G05F1/656
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。

7. 发明申请

US20090051339A1 DC-DC CONVERTER AND CONTROL CIRCUIT FOR DC-DC CONVERTER 有权
标题翻译： DC-DC转换器的DC-DC转换器和控制电路
公开(公告)号：US20090051339A1
公开(公告)日：2009-02-26
申请号：US12257222
申请日：2008-10-23
申请人： Morihito Hasegawa , Chikara Tsuchiya , Hidenobu Ito
发明人： Morihito Hasegawa , Chikara Tsuchiya , Hidenobu Ito
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。

8. 发明授权

US07456623B2 DC-DC converter and control circuit for DC-DC converter 有权
标题翻译： DC-DC转换器和DC-DC转换器的控制电路
公开(公告)号：US07456623B2
公开(公告)日：2008-11-25
申请号：US11436534
申请日：2006-05-19
申请人： Morihito Hasegawa , Chikara Tsuchiya , Hidenobu Ito
发明人： Morihito Hasegawa , Chikara Tsuchiya , Hidenobu Ito
IPC分类号： G05F1/575 , G05F1/656
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。

9. 发明申请

US20070145961A1 DC-DC converter and control circuit for DC-DC converter 有权
标题翻译： DC-DC转换器和DC-DC转换器的控制电路
公开(公告)号：US20070145961A1
公开(公告)日：2007-06-28
申请号：US11436534
申请日：2006-05-19
申请人： Morihito Hasegawa , Chikara Tsuchiya , Hidenobu Ito
发明人： Morihito Hasegawa , Chikara Tsuchiya , Hidenobu Ito
IPC分类号： G05F1/00
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

US08856554B2 Information terminal and method of reducing information leakage 有权
标题翻译：信息终端和减少信息泄漏的方法
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
IPC分类号： G06F11/30 , G06F21/80 , G06F1/26 , G06F21/88
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。

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